Dissertations / Theses: 'Waste paper'

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Short, Joe. "Composting and vermicomposting waste paper sludge." Thesis, Open University, 1999. http://oro.open.ac.uk/58000/.

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Increasing legislative and economic pressure to find more sustainable methods of organic waste management has fuelled innovation in biological treatment technology. By-products of paper manufacturing industries provide a large source of organic waste, which is known to have a high environmental impact. This waste paper sludge has been shown to be amenable to biological treatment. Recent research has confirmed that windrow-composting and vermicomposting techniques have potential to treat these wastes and share many economic and environmental benefits. Many authors have suggested that sludge specific composting methods need to be developed and this research aims to provide fundamental data in this respect. The treatment of specific waste paper sludges was investigated through small and larges calee xperimentsw ith the aim of optimising thesep rocessesw ith minimal intervention. Identical samples of a selected waste paper sludge feedstock were used in large scale investigations into the application of each composting technique, and the performance of each process and resulting products was evaluated. Windrow composting and vermicomposting were found to stabilise and enhance waste paper sludge in very different ways, producing unique products. In terms of processing, windrow composting resulted in more rapid rates of stabilisation and although the performance of the vermicomposting process was less effective in these respects, it afforded additional benefits as a treatment of waste paper sludge. Both processes were found to stabilise and enhance waste paper sludge but the selection of one system or the other will depend largely on the objectives of the project and the criteria required of the finished product.

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Ng, U.-hong Angela. "Paper balance for Hong Kong : consumption, waste generation, recovery and disposal /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18734911.

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3

Thomas, Christine. "Waste paper recycling : a community technology approach." Thesis, Open University, 1986. http://oro.open.ac.uk/57015/.

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This research project aims to explore the hypothesis that a Community Technology approach can be considered appropriate for reclamation and recycling activities, and to investigate the opportunities for reclaiming and recycling domestic wastes viably at a 'community' scale. A framework is first established to define a Community Technology approach, and then used to assess the compatibility of reclamation and recycling technologies to this approach. 'Community '-scale reclamation and recycling in Britain, together with some examples from the USA, is examined and the 'state of the art' for both areas of activity described. 'Community'-scale is interpreted as relating to groups of people of less than 10,000, defined as neighbourhoods (of between 100 and 1,000 people) and communities (of 1,000 to 10,000 people). Initial analysis identified only three recycling processes with potential as 'community'-scale activities; all concerned with waste paper recycling. One of these, a neighbourhood-scale technology, was chosen for a detailed feasibility study. The process involves recycling waste paper into sheets of drawing or printing paper suitable for use as 'art' paper, in particular as speciality printing paper, or as sugar paper in schools. The feasibility study was carried out using design and evaluation methods, to evaluate the technical and economic feasibility of the process and to investigate what role it might play in the community, in particular in relation to promoting greater community self-reliance. The results show that this technology would not be financially or economically viable as an independent enterprise but indicated additional non-quantified social benefits and hence a possible non-economic role in the community. Some possibilities of educational and job creation roles are explored.

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Sivasundaram, Mathumathi. "Glass ceramics from pulp and paper waste ash." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0032/MQ64248.pdf.

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Voigt, Paul George. "Bioethanol production from waste paper through fungal biotechnology." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1013447.

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Bioethanol is likely to be a large contributor to the fuel sector of industry in the near future. Current research trends are geared towards utilizing food crops as substrate for bioethanol fermentation; however, this is the source of much controversy. Utilizing food crops for fuel purposes is anticipated to cause massive food shortages worldwide. Cellulose is the most abundant renewable resource on earth and is subject to a wide array of scientific study in order to utilize the glucose contained within it. Waste paper has a high degree of cellulose associated with it, which makes it an ideal target for cellulose biotechnology with the ultimate end goal of bioethanol production. This study focussed on producing the necessary enzymes to hydrolyse the cellulose found in waste paper and using the sugars produced to produce ethanol. The effects of various printing inks had on the production of sugars and the total envirorunental impact of the effluents produced during the production line were also examined. It was found that the fungus Trichoderma longibrachiatum DSM 769 grown in Mandel's medium with waste newspaper as the sole carbon source at 28 °C for 6 days produced extracellular cellulase enzymes with an activity of 0.203 ± 0.009 FPU.ml⁻¹, significantly higher activity as compared to other paper sources. This extracellular cellulase was used to hydrolyse waste newspaper and office paper, with office paper yielding the highest degree of sugar production with an end concentration of 5.80 ± 0.19 g/1 at 40 °C. Analysis by HPLC showed that although glucose was the major product at 4.35 ± 0.12 g/1, cellobiose was also produced in appreciable amounts (1.97 ± 0.71 g/1). The sugar solution was used as a substrate for Saccharomyces cerevisiae DSM 1333 and ethanol was produced at a level of 1.79 ± 0.26 g/1, the presence of which was confirmed by a 600 MHz NMR spectrum. It was found that cellobiose was not fermented by this strain of S. cerevisiae. Certain components of inks (the PAHs phenanthrene and naphthalene) were found to have a slight inhibitory effect (approximately 15% decrease) on the cellulase enzymes at very high concentrations (approximately 600 μg/1 in aqueous medium), while anthracene had no effect. Whole newsprint ink was shown not to sorb glucose. The environmental analysis of the effluents produced showed that in order for the effluents to be discharged into an aqueous ecosystem they would have to be diluted up to 200 times. They were also shown to have the potential to cause severe machinery damage if reused without proper treatment.

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James, Aaron. "Development of composites materials from waste paper and plastic." Australian Digital Thesis Program, 2006. http://adt.lib.swin.edu.au/public/adt-VSWT20070130.165426/index.html.

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Thesis (PhD) - Swinburne University of Technology, Industrial Research Institute Swinburne - 2006.
A thesis submitted for the degree of Doctor of Philosophy, Industrial Research Institute Swinburne, Swinburne University of Technology - 2006. Typescript. "August 2006". Includes bibliographical references (p. 361-389).

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Owen, Icarus Jason. "Agronomic consequences of paper mill waste incorporation into soil." Thesis, University of Aberdeen, 1995. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU603180.

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The aims of this thesis were to study the agronomic impact of paper sludge incorporation on agricultural soil. through investigation of crop physiological response to paper sludge incorporation, nutrient cycling, soil parameters, soil moisture retention and then attempting to combine this multidisciplinary approach to the study of paper sludge into one empirical model, or management tool. Paper sludge (from Federal Tait Paper, Inverurie) was characterised to determine its composition and variability. In particular, the concentrations of nitrogen, cellulose and calcite were found to vary greatly. Prior to large scale field scale application and biomass-N studies a preliminary germination trial and biomass-N feasibility study were undertaken. The germination trial assessed the potential for paper sludge incorporation into soil to cause germination failure, due to the production of phytotoxic compounds, (e.g. acetic acid). It concluded that there was no risk of germination failure. However, it also indicated possible crop chlorosis associated with those seedlings grown on soil with paper sludge additions, suggesting N immobilisation. A preliminary biomass-N experiment concluded that large cores were unsuitable for biomass-N determinations and concluded that small sealed flasks with a well homogenised soil and paper sludge matrix would be more suitable for biomass-N determinations. To assess the agronomic effects of paper sludge incorporation into agricultural soil, a series of field experiments were carried out. Soil samples were regularly removed to assess soil parameters (e.g. soil pH). The incorporation of high N-concentrations of paper sludge was associated with no reduction in crop growth, harvest index, grain weight or grain numbers per ear. However, grain N-concentration and straw N-concentration were significantly increased as compared to those plots receiving no paper sludge additions. The increase in grain N-concentration approached that permissible by the malting industry of Scotland. The incorporation of low N-concentration paper sludge into soil was associated with significant decreases in crop growth, harvest index, grain numbers per ear and grain and straw N-concentrations, as compared to grain from those plots receiving no paper sludge additions. The decrease in crop growth and grain and straw N-concentrations suggest that N was limiting crop growth. Supplementary inorganic-N additions reinforced this hypothesise that N was limiting, as inorganic-N additions partly negated the reduction in crop growth associated with those plots receiving low N-concentration paper sludge additions. However, significant crop growth reductions were also associated with those plots receiving lime additions ( 8 t ha-1), suggesting that over liming of the soil could also cause crop growth reductions. As the paper sludge has a calcite component it was not possible to distinguish between the influence of the paper sludge affecting soil-N cycling and soil pH alterations in reducing crop growth. Paper sludge significantly increased soil pH. The moisture release characteristics of soil on plots receiving paper sludge applications were also significantly affected so that soil in plots receiving paper sludge additions held more moisture (at particular moisture tensions) than control soils. The biomass-N / N-immobilisation study demonstrated the rapid rise in biomass-N associated with paper sludge incorporation. Significant increases in biomass-N after 3 days of incubation, were associated with the soil receiving paper sludge. The potential for paper sludge to increase soil biomass-N was clearly demonstrated. To analyse the effect of individual paper sludge components on crop growth, a core experiment investigated the relationship between total biological yield (TBY) and those properties of the paper sludge considered to affect the crop growth (i.e. N-concentration, calcite concentration and cellulose concentration) using multiple linear regression techniques. Statistical modelling of the effect paper sludge incorporation into soil had upon crop TBY, explained 74.3% of the observed variation. The NCON (N-concentration of the paper sludge) variable was the largest influencing factor in determining the TBY (r=0.803).

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Min, Byeongcheol. "Enzymatic Hydrolysis of Cellulosic Fibers in Paper Mill Waste." Thesis, State University of New York Col. of Environmental Science & Forestry, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10270832.

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The waste fines (WF) rejected by paper mill are one of the good resources of lignocellulosic biomass to produce sugars. The potential of hydrolysis yield was around 95% (reducing sugars g/g of digestible fibers). The inhibitory effects of the substrate were studied since the enzyme demand for the hydrolysis was not economically feasible.

The major inhibitor of WF was the high portion of ash for enzymatic hydrolysis. The CaCO₃ among the ash was the strongest inhibitor with three different inhibiting effects. The first inhibition was related to reduced free enzyme in bulk solution resulted by non-productive enzyme adsorption on CaCO₃. The binding mechanism could be explained by the electrostatic and hydrogen bonding interaction between the enzyme and CaCO₃. The major mechanism of the enzyme – CaCO₃ binding differ with the enzyme – lignin binding which has been reported that the hydrophobic interaction is the major mechanism for the enzyme – lignin binding. The different mechanisms are due to the hydrophobic property: CaCO₃ is hydrophilic and lignin is hydrophobic. The application of a nonionic surfactant, Tween 80, could be a solution to free enzyme in bulk solution via competitive bond on CaCO₃ with a higher affinity than the enzyme. A study of CaCO₃ of particle size and Tween 80 adsorption on CaCO₃ provided evidence of this Tween 80 effect. The second inhibiting effect of CaCO₃ was pH level shift decreasing enzyme activity by dissolved Ca²⁺. pH adjustment (PAD) was tested with addition of acids to make the pH optimum for enzyme activity. PAD with extra acetic acid resulted in a positive effect but sulfuric acid did not improved hydrolysis yields. The combination application of Tween 80 and PAD yielded more than two times as much sugar release compared to the non-treated waste fines with a 10 FPU enzyme dose. The final inhibitory effect of CaCO₃ was dissolved Ca²⁺ reduced of enzyme activity. This effect was supported by the reduction of hydrolysis yield of Avicel and unbleached kraft pulp (UKP), and documentation of particle size increase due to the aggregation of enzyme in the presence of Ca²⁺.

Some other approaches were studied to improve the hydrolysis yield of paper mill waste fines. These included using combinations of adding nonionic surfactant, high consistency hydrolysis, buffer substitution, and deinking flotation. Each method improved the productivity or reduced the cost of production and may be combined in one process to get synergetic effects.

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Ammineni, Chandini Muniratnam. "Design of Lignin Sensor for Identification of Paper Grades for an Automatic Waste Paper SortingSystem." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20010907-181312.

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AMMINENI, CHANDINI MUNIRATNAM. Design of Lignin Sensor forIdentification of Paper Grades for an Automatic Waste Paper SortingSystem. (Under the direction of Dr. M. K. Ramasubramanian.)The purpose of this research has been to design a lignin sensor fornon-destructive, real-time identification of waste paper grades, toaid in automating a waste paper sorting process. The sensor iscapable of identifying about 500 papers in one second. It is based onthe principle that fluorescence light emitted from paper followingabsorption of visible light has a wavelength distribution determinedby the chemical composition of the paper. The sensor is the most critical part in waste paper sorting, whichhas hitherto not been automated due to the inability to design asensor that distinguishes paper grades. This sensor is vastlysuperior to all other sensors previously designed for this purposebecause, it does not use the conventional reflective type opticalproperties of paper, and this is the only sensor that can identifyall grades unlike the previous sensors that could identify only whiteledger papers.

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Unuofin, Frank Oshioname. "Optimization of the vermidegradation of cow dung – waste paper mixtures." Thesis, University of Fort Hare, 2014. http://hdl.handle.net/10353/d1021276.

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Vermicomposting is an eco-friendly waste management strategy. Its successful performance necessitate that key functioning parameters like earthworm stocking density, nutrient enrichment be established for each target waste/waste mixture. One main target waste mixture in South Africa, and in the University of Fort Hare in particular is waste paper mixed with cow dung and rock phosphate (RP) for phosphorus (P) enrichment. This study was carried out to address the following specific objectives, to determine (i) the effect of Eisenia fetida stocking density on the bioconversion of cow dung waste paper mixtures enriched with rock phosphate, (ii) an optimum application rate of low grade South African Rock Phosphate and time required for efficient vermicomposting of cow dung-waste paper mixtures, and (iii) to determine if the phosphorus in RP is responsible for improved biodegradation during the vermicomposting of cow dung-waste paper mixtures. Results of this study revealed that bioconversion of cow dung waste paper mixtures enriched with RP was highly dependent on E. fetida stocking density and time. The stocking density of 12.5 g-worms kg-1 feedstock of the mixtures resulted in highest earthworm growth rate and humification of the waste mixture as reflected by a C: N ratio of < 12, polymerization index (PI) or humic acid/fulvic acid ratio of > 1.9, and a humification index of >13 for the cow dung waste paper mixtures. A germination test carried out also revealed that the resultant vermicompost had no inhibitory effect on the germination of tomato, carrot, and radish. Extractable P increased with stocking density up to 22.5 g-worm kg-1 feedstock, suggesting that for maximum P release from RP enriched wastes, a high stocking density should be considered. Informed by an earlier study which demonstrated that RP improved vermidegration, a follow up study was done to determine the optimum amount of rock phosphate necessary for efficient vermidegradation of cow dung waste paper mixtures while ensuring a phosphorus rich vermicompost. The results showed that addition of RP at rates ≤ 1% P as RP efficiently enhanced the bioconversion of cow dung waste paper mixtures as reflected by low C: N ratio, high polymerization index (PI), HI and HR used as maturity indicators for matured compost. Final vermicompost products obtained at minimum amounts of RP application rates resulted highly humified vermicompost with finer morphological structure, with no inhibitory effect on the germination of tomato, carrot, and radish similar to the ones obtained at higher RP rates. The findings suggest that 1%P as RP application rate is optimum for efficient vermidegradation of cow dung waste paper mixtures. Since P or Ca happen to be the most prevalent elements in most rock phosphate used for compost enrichment, a study was carried out to determine if P or Ca in RP is predominantly responsible for the improved biodegradation of cow-dung waste paper mixture observed during vermicomposting. Phosphorus sources in form of triple superphosphate (TSP), phosphoric acid (PHA) and Ca in form of calcium chloride (CaCl2) salt were compared with rock phosphate. The results from the study indicated that TSP, a water soluble P source, resulted in greater and faster degradation of the waste mixtures than RP while the Ca source had the least effect. With TSP incorporation the compost maturity C: N ratio of 12 was reached within 28 days while RP, PHA and CaCl2 needed 42, 56 and more than 56 days, respectively. The results indicated that P was largely responsible for the enhanced bioconversion of the waste mixtures. This appeared linked to the effect of P to stimulate microbial growth as reflected by higher microbial biomass carbon levels where water soluble P sources were applied. The C: N ratios of the final vermicomposts at day 56 were 10, 11.5, 13, 14, and 23 for TSP, RP,PHA, Control (No P added) and CaCl2 treatments, respectively. Although TSP gave superior superior performance, RP may still be the preferred additive in the vermicomposting of cow dung waste paper mixtures as it is cheaper and produces mature compost in a shorter period of 8 weeks. Generally, the results of this study have shown that the vemidegradation of cow dung waste paper mixtures can be optimized through adoption of an E. fetida stocking density of 12.5g- worm kg-1 and an RP incorporation rate of 1% P as RP. However, higher rates of RPincorporation may be adopted where final vermicomposts with higher P fertilizer value are desired. Phosphorus appears to be the RP constituent responsible for its ability to enhance the vermidegradation of cow dung waste paper mixtures. Future studies should explore the effectiveness of other P-bearing minerals for their effectiveness in enhancing vemidegradation.

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Malm, Catharina, and Mika Silfver. "Investigating the complex problems of waste paper at Larsson Offsettryck." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-95276.

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Waste paper is a big problem in the graphic arts business, both from an environmental point of view and from a financial one. Since focus is often put on obtaining low costs and high production speed, the work of reducing the amount of waste paper becomes a secondary issue for many companies. In this master thesis we have looked for reasons for waste paper generation in the beginning of the printing process, the adjustment phase, by studying the printing press Heidelberg Speedmaster CD 102-5 at the printing house Larsson Offsettryck AB in Linkoping. We have found suggestions on how to reduce the amount of waste paper by observing and interviewing the staff members at Larsson Offsettryck AB, measuring print quality and perform analyses based on the theoretical knowledge we have obtained through our studies at Linkoping University. For our test printings we used one coated paper quality, Tom&Otto Silk 150 g, and one uncoated paper quality, Maxi Offset 170 g. To analyse the printing result we used both objective and subjective evaluations. The result from our study is that the adjustments made in the beginning of the printing process, to achieve correct colour level, can be finished earlier than the printing press indicates. A total of 40-60 sheets can be saved for each adjustment. According to our research the number of sheets per adjustment at Larsson Offsettryck AB today is approximately 140, which means that the number of adjustment sheets for Larsson Offsettryck AB can be decreased by roughly 35 % through this simple alteration of the printing process. We have also examined the ICC profiles used at the printing house and concluded that the grey balance for uncoated paper is not satisfactory and should be improved.
Pappersmakulatur ar ett stort problem inom den grafiska branschen, bade ur miljoperspektiv och ur en ekonomisk synvinkel. Eftersom fokus ofta laggs pa att halla laga priser och hog produktionshastighet blir arbetet med att minska mangden pappersmakulatur en sekundar fraga for manga foretag. I detta examensarbete har vi sokt orsaker till makulaturuppkomst i borjan av tryckprocessen, installningsfasen, genom att studera tryckpressen Heidelberg Speedmaster CD 102-5 pa tryckeriet Larsson Offsettryck AB i Linkoping. Vi har tagit fram forslag pa hur mangden makulatur kan minskas genom att observera och intervjua personalen pa Larsson Offsettryck AB, mata tryckkvalitet och utfora analyser baserade pa den teoretiska kunskap vi inforskaffat under var utbildning vid Linkopings universitet. For vara testtryckningar har vi anvant oss av en bestruken typ av papper, Tom&Otto Silk 150 g, och en obestruken typ av papper, Maxi Offset 170 g. For att analysera vara resultat har vi anvant oss av bade objektiva och subjektiva utvarderingsmetoder. Vara resultat visar att de justeringar som gors i borjan av tryckprocessen, for att astadkomma ratt fargbalans i tryckpressen, kan avslutas tidigare an vad tryckpressen indikerar. Under varje justering kan 40-60 ark sparas. Enligt var undersokning kravs det idag omkring 140 ark per justering pa Larsson Offsettryck AB, vilket innebar att antalet installningsark kan minskas med cirka 35 % genom denna enkla forandring av tryckprocessen. Vi har aven undersokt Larsson Offsettryck AB:s ICC-profiler och slutit oss till att den grabalans som aterfinns i profilen for obestruket papper inte ar optimal och kraver forbattring.

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Rezaee, Arash [Verfasser]. "Analysis of Waste Paper Processing through Disc Screen / Arash Rezaee." Aachen : Shaker, 2017. http://d-nb.info/1138178608/34.

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Okeyinka, Oriyomi M. "The applicability of recycled waste paper as lightweight building materials." Thesis, University of Wolverhampton, 2016. http://hdl.handle.net/2436/620495.

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In this era of increasing standard of living and rapid growth of civil engineering construction, environmental issues pertaining to natural resources depletion, global warming, energy crisis, waste pollution and greenhouse gas emission have been major issues of concern throughout the world and most especially in the construction industry. This research was conducted to investigate the applicability of recycled wastepaper as lightweight building materials with focus on contributing to sustainability in the creation of the built environment. The major aim was to develop an eco-friendly lightweight non-loadbearing block from recycled wastepaper without the use of cement as binder. This study specifically addressed the drawback of low strength development that usually occur with increasing wastepaper content in the existing cement-based-wastepaper blocks. It also indirectly addresses; the environmental impacts associated with the construction industry (including; high consumption of natural resources, greenhouse gas emission, high energy consumption and so on), the environmental pollution resulting from unsustainable waste generation, and the generic drawback of high water absorption that plagues wastepaper-based blocks. To achieve this, research methods including; laboratory experimentation and simulation modelling were employed. The research outcome is an eco-friendly block unit designated as Cement-less Wastepaper-based Lightweight Block (CWLB) which contains 75% waste content and exhibiting properties that satisfy the requirements for application as non-loadbearing lightweight blocks in building construction. CWLB displayed compressive strength that far outweighs those recorded for the existing cement-based wastepaper blocks available in the literature. The properties recorded for the optimal CWLB includes; 2.71 MPa average compressive strength, 901.5 kg/m3 average density, 0.19 W/m.k thermal conductivity, 989.9 m/s ultrasonic pulse velocity, 0.0026 g/m2.S0.5 average coefficient of capillary water absorption and 883.38 MPa estimated elastic modulus. The approximate compressive strength of 2.38 MPa and 1.58 MPa were respectively predicted and recorded for the solid and hollow finite element model samples of CWLB. The impressive satisfactory properties of CWLB for the intended application and its eco-friendliness in terms of natural resources conservation and improved compressive strength suggests that CWLB shall indeed serve as a more sustainable alternative to the reigning/existing cement-based-wastepaper blocks and to the conventional masonry blocks of the same category. Amongst other things, future work will address the validation of the approximate compressive strength predicted for the solid and hollow CWLB insitu samples in order to take further the subject matter.

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Snyder, Bret Alan. "De-inking toner-printed paper by selective agglomeration /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/9886.

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Emerson, Zachery Ian. "Particle and bubble interactions in flotation systems." Auburn, Ala., 2007. http://repo.lib.auburn.edu/2007%20Spring%20Dissertations/EMERSON_ZACHERY_45.pdf.

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Filová, Dagmar. "Optimalizace bioprodukce ethanolu z odpadních materiálů metodou SSF." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-217143.

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Presented diploma thesis is dealing with the problematics of fuel ethanol production. Relevant basic terminology is explained in the theoretical part, methods of lignocellulose pre-treatments and their conversion to bioethanol are introduced. Attetion is also given to microorganisms used for bioethanol production on industrial scale, as well as analytical instrumental techniques for glucose and ethanol detection. In experimental part, we are focusing on substrate composition analysis – contents of dry matter, cellulose and ash was investigated. Waste paper was chosen as substrate, as it does not find any other use beside recycling these days. Chosen production microorganism, that conversts sugars into etanol was the unknown strain of Saccharomyces cerevisiae. Primal substrate pre-treatment – removal of rigid parts was performed in several physical and physical – chemical ways. Substrate with such pre-treatment was ready for enzymatic hydrolysis, during which monomers from polymer matrix were formed. Ethanol was produced using method of simultaneous saccharification and fermentation, when enzymatic hydrolysis and fermentation take place at the same time and the same container.

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Szeinbaum, Nadia. "Assessment of anaerobic treatment of select waste streams in paper manufacturing operations." Thesis, Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/34847.

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The most common strategy for handling paper mill solid waste is typically disposal in landfills. However, several drawbacks are associated with this type of solid waste management, such as increasing costs due to oil price rise, governmental restrictions on land use, and environmental concerns such as leaching of disposed contaminants into groundwater, as well as methane generation of and release to the atmosphere, thus contributing to global warming. An alternative to reduce solids prior to disposal and to recover methane as a renewable fuel is anaerobic digestion, but it is not yet clear whether such an approach is feasible in paper mills. In this study, the anaerobic digestion of paper mill waste streams was evaluated for a paper plant located in Belen, Costa Rica, to investigate up to what extent certain waste streams can be anaerobically digested, to what extent energy can be produced in the form of methane for implementation in a wastewater treatment plant and to evaluate the conditions that will favor methane generation from select waste streams. Batch assays were performed to evaluate the biodegradability of single and combined waste samples under ideal, laboratory conditions. Samples were obtained from the manufacturing plant as well as the wastewater treatment plant at the paper mill under study. The ultimate biodegradability ranged 25 to 85% in terms of volatile solids destruction, corresponding to the waste activated sludge (WAS) and Flotation Cell rejects, respectively. The COD destruction of single samples ranged from 45 to 63%, corresponding to WAS and wastewater treatment plant (WWTP) dissolved air flotation (DAF) skimmings, respectively. Methane generation ranged from 80 to 190 ml at 35oC/g COD added for all single samples (excluding underflows). In combination Feed 1 was reduced by 46 and 52% and Feed 2 by 27 and 38%, respectively. Two combinations of two single samples each (Feed 1 and 2), formulated according to plant operational data, and their solids and COD destruction as well as methane generation in semicontinuous flow anaerobic digesters were evaluated at different solids retention times (30, 20, 15, and 7 days). Nutrients (N, and P) availability as well as alkalinity in the plant waste streams were evaluated and minimum supplements were used to support an efficient anaerobic digestion process. The reactors reached stable operation at all retention times evaluated. Methanogenesis was the predominant, terminal metabolic process under anaerobic, mesophilic conditions, but the overall process rate was determined by the hydrolysis of the particulate substrate. Reactors fed with Feed 1 achieved the highest level of destruction, which amounted to 85% of phosphorus that is typically present in paper mill wastes. Alkalinity addition to the feed (3.5 mg NaHCO3/L) was necessary to maintain the reactors pH above 6.9.

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Backlund, Per. "Återvinning av dryckeskartonger : En studie som syftar till att öka återvinningsgraden av Tetra Paks förpackningar i Indonesien." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-90672.

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People of the modern world consume more than they ever used to do. Because of the close correlation between consumption and the amount of waste, the waste volume is also expected to increase. The purpose of this study is to examine if some measures in the recycling process from Sweden could be implemented in Indonesia. In fact, Indonesia is one of the countries in which the waste management system is struggling. Tetra Pak, one of the world leading producer of food packaging, is studied in this report. Tetra Paks recycling rate of their beverage cartons is relatively low, 8.42 %, in Indonesia compared with their recycling rate in other countries. To answer the purpose, information was collected from scientific reports, by interviews carried out in both Sweden and Indonesia and by study visits in Indonesia. The results of the study shows that there are measures which could be made in the recycling process to increase the recycling rate in Indonesia. School projects and deposit systems could increase the collection rate and a drumscreen and a buffertank could make the recycling process more profitable for the papermills. There is also some alternative end products which could make the whole recycling process more public visible. One of the conclusions of this study is that the paper mills should adjust their drumscreens, this to increase the fibre yield which is crucial for the recycling value. Another conclusions is that Tetra Pak should consider to initiate a recycling business by their own, in order to reduce the burden on the environment.

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Ng, U.-hong Angela, and 吳如虹. "Paper balance for Hong Kong: consumption, waste generation, recovery and disposal." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31253842.

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Elliston, Adam. "The exploitation of municipal solid waste (MSW) and related waste paper streams in the production of bioalcohol." Thesis, University of East Anglia, 2012. https://ueaeprints.uea.ac.uk/42366/.

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An organic fraction from municipal solid waste (MSW) comprised 38.9% (w/w) glucose (cellulose and starch) indicating its potential as a substrate for bioalcohol production. Microscopy indicated that the fraction was rich in waste paper fibres. Much paper waste comes from shredded office paper (50.4% w/w glucose) which is unrecyclable because of poor fibre length. This, and microbiological hazards associated with the use of MSW led to its choice as model substrate for study. Saccharification of shredded paper waste was optimised by selection of Accellerase® and additional beta-glucosidase enabling digestion of 99.27% of cellulose. Sequential batch-addition of substrate permitted substrate “concentrations” equivalent to 25-30% (w/v). Saccharification was enhanced by detergent, but reduced by the presence of alcohols at over 3-4% (v/v). Steam explosion of paper slightly enhanced saccharification. However, the approach was rejected due to high energy cost, production of fermentation inhibitors at high severities, and lack of clear benefit regarding ethanol yield. Interestingly, levels of inhibitors were low compared to other pre-treated substrates and addition of paper to other substrates greatly reduced their own production of inhibitors during pre-treatment (wheat straw 60%, filter paper 95%). Larger pilot-scale (1.5-5 L) operations involved developing the batch-addition regime with a high-shear stirring capacity vessel. Additions equating to final substrate concentrations of ~65% (w/v) were achieved (from an initial 5% w/v) and facilitated high ethanol concentrations (11.6% v/v) with minimal enzyme input (3.7 FPU/g substrate). Thermal tolerance of a range of yeast strains was investigated by developing a rapid screening approach with liquid-handling robotics. This identified strains able to endure temperatures up to 40°C. Evolutionary engineering may improve tolerances to temperatures nearer to enzyme optimums (50°C). Some previously unused strains exhibited superior growth to referenced industrial strains. The above findings were integrated into a process design along with recommendations for further enhancement.

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Ryder, Kathryn. "The development of paper-based materials from low-grade apparel waste." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/the-development-of-paperbased-materials-from-lowgrade-apparel-waste(9aef77c7-57ac-4cf1-8d4b-0d6952dd4f19).html.

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The recycling rate of post-consumer apparel waste is low. This is compounded by our limited understanding of the fibre recovered from apparel waste and a lack of development in novel applications. Motivated by the growing rate of accumulation in unwanted clothing, this study focused on a number of integrated research themes aimed at understanding the nature of reclaimed cotton fibre, its use in paper-based materials and its utilisation in apparel related applications. Initially, the investigation characterised reclaimed cotton fibres from two different recovery machines (pinned air-layer and cutting mill). The results showed that neither process was capable of producing adequate fibre quality for fine yarn manufacture. The fibres exhibited extensive surface damage, length shortening and an increase in length distribution. After the initial characterisation, studies were undertaken to investigate the use of paper technology to increase the possibility of using reclaimed fibre in apparel. Strength is an important property in apparel related applications, therefore, the strength of reclaimed cotton-based paper was enhanced. The effects of a 4% sodium hydroxide pre-treatment on the beating performance and resultant sheet properties of reclaimed fibre pulp were investigated. At low beating levels, the results showed a significant 35% and 39% increase in tensile strength and energy absorption, respectively. With the treatment it is, therefore, possible to obtain a strong paper with high bulk, which can be further utilised to improve surface softness. Optimum dry and wet strength enhancement of the resultant paper was obtained with the combined addition of 1% carboxymethyl cellulose and 2% polyamideamine-epichlorhydrin. The development of wet strength was vital in order to facilitate uniform twist insertion in subsequent paper yarn manufacture. This study was one of the first to test the viability of using reclaimed cotton fibre in the production of paper yarns suitable for apparel manufacture. The wet-strengthened reclaimed-fibre paper was slit into 3 mm width ribbons, dampened, then twisted into yarns. The resultant yarns (46–193 tex) were uniform but lacked sufficient strength for use in weaving and knitting processes. Analysis of a commercial paper yarn, OJO+ , suggested that strength could be improved if fibre orientation was increased in the machine direction. A further application, in the form of a jacket, was trialled. The focus here was to test sewability using a variety of seam and stitch formations to sew together denim-derived cotton paper. A simple design using lap seams with straight stitching was established as the most effective construction. The final jacket satisfied industry requirements on seam strength and efficiency, however, further investigation into improving comfort and wear-ability will be essential.

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22

Johansson, Ingrid, and Walter Deltin. "Utilization of Pulp and Paper Waste Products in the Metal Industry : Initial testing of carbon-containing waste material briquettes." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231792.

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Today, a huge part of waste products from pulp and paper industries ends up in landfill which is both economically and environmentally adversely. This report examines the possibilities of using those products as a slag foamer and fuel in different furnaces in the metal industry. The waste products contain valuable elements, especially carbon. Therefore, there is an increased interest in finding possible use for the waste products in the metal industry. The reuse would contribute to preservation of energy as fossil fuel can be replaced. In the report, two waste materials called mixed biosludge and fiber reject are examined. The experiments are performed with the waste products pressed together with a base material and cement forming a briquette. The requirements examined are strength needed for both transportation and use in furnaces and ability to create a foaming slag. The results in strength were ambiguous, no waste material based briquettes met the set criteria. As of now, the briquettes are probably not strong enough to be transported. No foaming occurred during the experiment, but only one experiment was performed. Therefore, further experiments are needed before any conclusions can be drawn. The briquettes can possibly replace coke and coal in applications where strength is not as important. Nevertheless, it is uncertain if the briquettes affect the steel quality.
Idag läggs en stor del av restprodukter från pappers och massaindustrin på deponi, vilket innebär såväl ekonomiska som miljömässiga nackdelar. Den här rapporten undersöker möjligheterna att använda dessa restprodukter som slaggskummare och bränsle i de olika ugnarna inom metallindustrin. Restprodukterna innehåller värdefulla ämnen, framförallt kol. Därför finns det ett ökat intresse för att hitta möjliga användningsområden för restprodukterna inom metallindustrin. Denna återanvändning skulle bidra till energibevarande eftersom fossila bränslen kan ersättas. I den här rapporten undersöks två restmaterial, blandat biologiskt slam och fiberavfall. Experimenten utfördes med dessa restprodukter pressade samman med ett basmaterial och cement till en brikett. Kraven som undersöks är styrka för både transport och användning i ugnarna samt förmågan att skumma en slagg. Resultaten för briketternas styrka var tvetydiga, inga av briketterna innehållande restprodukter satisfierade det uppsatta kriteriet. Styrkan är troligtvis för låg för att transport ska vara möjlig. Ingen skumning skedde under experimentet, men endast ett experiment genomfördes. Därför behöver ytterligare experiment genomföras innan några slutsatser kan dras. Men briketterna tros kunna ersätta koks och kol där styrkan inte är viktig. Men det är osäkert om briketterna påverkar stålkvaliteten.

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Jordan, Alexander Thomas. "Liquid phase plasma technology for inkjet separation." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47543.

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Currently most deinking technologies are dependent upon flotation and dissolved air flotation (DAF) technology in order to separate inkjet ink from fiber and water. Much of this technology is based on ink that is extremely hydrophobic. This made flotation and DAF very easy to use because the ink in the water would very easily move with the air in flotation and be brought to the surface, after which the ink can be skimmed and the pulp can be used. Now that small scale printing has become the norm, there has been a move to high quality, small scale printing. This involves the use of a hydrophilic ink. Hydrophilic ink cannot be easily separated from water and fiber the same way the hydrophobic ink can be. With low concentrations of hydrophilic ink in the process water stream, it can be absorbed into the process but as the hydrophilic ink concentration rises alternative methods will be needed in order to separate inkjet ink from water. One solution is to find a method to effectively increase ink particle size. This will enable the ink particles to be filtered or to have an increase ecacy of removal during flotation. In this thesis, one solution is discussed about how electric field and electric plasma technologies can be used to increase particle size and help purify process water in recycle mills. This plasma treatment can very effectively bring ink particles together so that they may be separated by another method. There are two methods by which this may take place. One is polymerization and the other is electro-coagulation. These processes can work side by side to bring ink particles together. This plasma treatment process creates free radicals by stripping off hydrogen atoms from surrounding organic matter. These free radicals then react with the high alkene bond content within the ink to create a very large covalently bonded molecule. This is the new mechanism that is being investigated in this thesis. The other action that is taking place is electro-coagulation. Plasma treated ink can be filtered out using a cellulose acetate or cellulose nitrate membrane or they can be filtered using paper or fiber glass filters as well. The extent at which these can be filtered out is dependent on the size of the pores of the filter. In this study, it was shown that the plasma treatment was able to clean water with a fairly small amount of energy. It was also found that treatment time and concentration had very little eect on the outcome of the treatment ecacy. One factor that did have an effect was the pH. At very high pH values the process became noticeably less eective. The high pH essentially eliminated the electro-coagulation aspect of the treatment process and also hurt the polymerization aspect as well because of lower amount of hydrogen atoms available for the plasma to create free radicals. A model of the process was used to try to give the reader an idea of the ecacy that the process would have in an industrial scale process. The model assumes that two types of ink particles exist. One is ink that has a radical and another in which the ink does not have a radical. The model also assumes that if ink is at all polymerized, ink is filtered out with the 0.8 micron filter. The model assumes three reactions; initialization, propagation and partial termination. The partial termination is a result from the general chemical structure of ink. Ink has many double bonds in its general structure which makes termination very unlikely to occur, so the model assumes that on average when two radials interact that only one is eliminated. This model is only supposed to give the reader an idea of the ecacy of the process. The numbers provided in the model will change very significantly in a different system. The evidence behind polymerization aspect of the process comes from two main sources. One is the small molecule analysis from methanol after being exposed to the plasma and the other from the plasma being exposed to allyl alcohol. The small molecule analysis shows that the process generates free radicals on organic molecules. Methanol was exposed to the plasma and then the resulting GC/MS analysis showed that 1,2-ethanediol was present, this showed that the electric discharge process was able to create free radicals on organic molecules in the liquid phase. Using a similar process the plasma discharge process was exposed to a mixture of allyl alcohol, water and propanol and water in two separate experiments. The difference between these two molecules is an alkene bond that is between the carbon two and carbon three atoms. The particle size of both samples was then analyzed and it was shown that the solution with allyl alcohol had an average particle size about an order of magnitude larger than the solution with propanol in it. Because of all the evidence discussed here and in the rest of the thesis we believe that the plasma treatment of ink has both polymerization and electro-coagulation aspect. This process could also be a potential solution to the water soluble ink problem that will soon face the recycling industry.

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24

Knutson, Kristina Parks. "Enzymatic Biobleaching of Recalcitrant Paper Dyes." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7959.

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Modern manufacturing processes assume efficient utilization and recycling of natural resources whenever possible. Over the past decade paper recycling has progressed from 33.5% in 1990 to just above 48% in 2002.1 Indeed, for certain select grades, (newspaper and old corrugated containers) greater than 70% is currently being recycled. In contrast, mixed office waste and colored directory papers are often underutilized. A major difficulty in recycling these grades of paper is the problems associated with decolorizing the dyes present in the paper.2 Of the commonly used paper dyes, the stilbene dye Direct Yellow 113 and methine dye Basazol 46L are notorious4 for poor bleachability with the commonly used chemical bleaching agents including chlorine dioxide, oxygen, hydrogen peroxide and sodium dithionite. The ability of white-rot fungi to decolorize colored effluents containing textile dyes is currently the subject of intensive research efforts. The secreted enzymes involved in dye decolorization include manganese peroxidase, lignin peroxidase and laccase. Laccase, a lignolytic enzyme, has also been studied for many years for the biobleaching of wood pulps. The ability of laccase to delignify pulp is greatly enhanced by the addition of small molecule mediators such as 2-2´ azinobis (3-ethylbenzthiazoline-6-sulfonate) (ABTS) and 1-hydroxybenzotriazole (HBT). This research project focused on applying laccase combined with a mediator to decolorize C.I. Direct Yellow 11 and Basazol 46L. Three mediators were tested: ABTS, HBT and violuric acid. Laccase/ABTS was most effective with 60% of the color being removed. The level of color removal was maintained at 60% even when ABTS concentration was lowered from 5 mM to 0.01 mM. When laccase/1 mM ABTS was applied to Direct Yellow 11 in solution, the majority of color loss occurred within 60 minutes. The ability of soybean (SBP) and horseradish (HRP) peroxidases and laccase to decolorize Direct Yellow 11 and Basazol 46L in solution was also examined. The results demonstrated that these two recalcitrant dyes could be effectively decolorized by enzymatic treatments by horseradish peroxidase, soybean peroxidase, and laccase with ABTS as mediator. SBP is effective from pH 4.5 to 8.5. The stilbene dye Direct Yellow 11 responded to both SBP and laccase/ABTS. For the methine dye Basazol 46L, SBP was a more effective treatment than HRP or laccase/ABTS. Basazol 46L responded quickly to SBP treatment with 74% reduction in signal intensity within 5 minutes. To evaluate the effectiveness of laccase/ABTS treatment, pulp dyed with Direct Yellow 11 and three commercial colored pulps were subjected to seven different bleaching treatments. These treatments consisted of 1)laccase/ABTS; 2)laccase/ABTS followed by alkaline extraction; 3)laccase/ABTS followed by bleaching with sodium dithionite; 4)oxygen bleaching; 5)oxygen bleaching followed by dithionite treatment; 6)alkaline hydrogen peroxide bleaching; and 7)alkaline peroxide bleaching followed by dithionite treatment. The best results were obtained by including reductive bleaching with sodium dithionite. For Direct Yellow 11 dyed pulp, laccase/ABTS followed by dithionite yield comparable reduction in color to oxygen or peroxide followed by dithionite.

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25

Schmidt, Dale C. "Flotation deinking of toner-printed papers /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/9828.

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Joyce, Jim. "Color and TOC removal from pulp and paper wastes by ultrafiltration." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/91035.

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Ultrafiltration studies were conducted to determine a treatment approach to remove color and organic carbon from the pulp and paper wastewaters at the Union Camp Corporation, Franklin, VA. Analysis of data collected during this research indicate that ultrafiltration can produce an effluent with less than 5 color units and less than 5 mg/L TOC (99% and 97% removal respectively). The data also indicate that biotreatment of the wastes prior to ultrafiltration removes the smaller molecular weight organic compounds, making ultrafiltration more effective. Pretreatment by pH adjustment and alum coagulation were not effective in improving ultrafiltration performance. Concentration studies indicate that volume reductions up to 95% may be accomplished without excessive membrane fouling. Membrane cleaning with caustic, hypochlorite and detergent produced identical results. It is expected that ultrafiltration would be a more cost effective method of color and TOC removal than coagulation, and would not require sludge disposal.
M.S.

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27

López, González Néstor David. "Secagem convectiva de papel reciclado com incorporação de corantes naturais." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266710.

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Orientadores: Melissa Gurgel Adeodato Vieira, Sandra Cristina dos Santos Rocha
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química
Made available in DSpace on 2018-08-21T04:23:24Z (GMT). No. of bitstreams: 1 LopezGonzalez_NestorDavid_M.pdf: 6381922 bytes, checksum: e497b1236a95bb6095b1c33957146b02 (MD5) Previous issue date: 2012
Resumo: O papel está presente em muitas das atividades do cotidiano que vão desde usos sanitários, passando pelas embalagens até fins educativos. Este material que teve sua origem há quase 2000 anos, continua sua evolução na procura de alternativas limpas para seu reaproveitamento. Novos processos de reciclagem, secagem e a incorporação de materiais alternativos para melhorar as propriedades do papel fazem desta área de pesquisa a base para a criação de novas tecnologias e produtos com apelo ambiental. Neste contexto, este trabalho teve como objetivo a avaliação da reutilização de papel de escritório na forma de papel cartão com adição de extratos corantes naturais Carmim de cochonilha, Cúrcuma e Urucum, implementando um processo de destintagem dos papéis a serem reciclados e secando o papel em um secador convectivo em escala laboratorial para obter papel cartão artesanal colorido. Para isto, foi determinada uma formulação para cada uma das três polpas a serem tingidas com os corantes naturais e construídas as curvas de secagem para diferentes condições de secagem. Efetuou-se uma análise comparativa da qualidade dos papéis obtidos em diferentes condições de secagem e avaliou-se a degradação da cor dos papéis obtidos sob diferentes condições de iluminação. O estudo da secagem mostrou que as polpas fabricadas com cada um dos três corantes apresentaram processos de secagem equivalentes apesar de ter formulações diferentes. Além disso, uma análise estatística mostrou que a velocidade e a temperatura do ar de secagem influenciam positivamente o processo, afetando a duração deste. Na avaliação da qualidade dos papéis verificou-se que esta pode ser afetada por variações nas condições de secagem. Uma menor qualidade foi obtida em papéis secos sob condições mais drásticas de velocidade e temperatura do ar. Os testes de colorimetria realizados nas amostras evidenciaram que as condições de secagem podem modificar a saturação das cores dos papéis, gerando diferenças colorimétricas nos papéis obtidos e apresentando cinéticas de degradação diferentes para cada papel fabricado. Os extratos corantes de Carmim de cochonilha, Urucum e Cúrcuma apresentaram boa estabilidade no teste de abrigo à luz, mas nos testes realizados com luz ultravioleta e fluorescente a estabilidade das cores foi baixa. O carmim de cochonilha se apresentou como o corante com maior estabilidade e poder tintorial. Os corantes naturais analisados nesta pesquisa mostraram potencial para serem utilizados na fabricação de papéis reciclados artesanais
Abstract: The paper is present in many everyday activities from sanitary uses, through the packaging until educational purposes. This material was originated almost 2000 years ago, and continues its evolution in the search of environmental alternatives to be reused. New processes to recycling, drying and the incorporation of alternative materials carry out an important role for the creation of new products and new technologies with environmental appeal. In this context, this work aimed the evaluation of office paper in the form of cardboard with the addition of natural extracts dyes such as Cochineal Carmine, Turmeric and Annatto, using a de-inking process of paper and drying in a convective-scale laboratory dryer for obtain a colorful handmade paper card. For this, a formulation was determined for each of the three paper pulp to be dyed with natural dyes, the drying curves were analyzed for different drying conditions, moreover a comparative analysis of the quality of the paper obtained under different conditions of drying was accomplished and the degradation of color paper obtained under different lighting conditions was evaluated. The study showed that drying of the paper pulp manufactured for each of the three dyes present equivalent drying processes, despite that these had different formulations; in addition, a statistical analysis showed that the air velocity and temperature of the drying air have a positively influence in the process. In the study of quality of paper, it has been demonstrated that variations in the drying conditions affects the quality of paper, such as reducing these with the increase in velocity and air temperature. The colorimetric test showed that the drying conditions can change the color saturation of the paper, causing colorimetric differences in the papers obtained and having different degradation kinetics for each paper produced. The extracts of cochineal carmine, Annatto and Turmeric dyes showed good stability under the test of light; however, the stability for the test performed with ultraviolet and fluorescent light. The results using cochineal carmine dye presented greater stability and tinctorial power. Natural dyes tested in this study showed potential to be used in the manufacture of handmade recycled paper
Mestrado
Processos em Tecnologia Química
Mestre em Engenharia Química

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28

Miroshnikova, Olga. "The Effect of Temperature on Lignin Degradation in Municipal Solid Waste." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/44891.

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Paper and paperboard are the major constituents found in US landfills. Typically paper consists of 79% to 98% of lignocellulose which is considered to be the most abundant source of natural carbon on earth. Lignocellulose decomposition depends on the association of biodegradable cellulose and hemicellulose with lignin. Lignin is a recalcitrant material which hinders cellulose degradation in conventional landfills. Because of this property of lignin cellulose to lignin ratio (C/L) is a common landfill stabilization parameter. Refuse degradation in landfills is a microbiological process and is highly dependent on temperature, moisture, and pH. Bioreactor landfills are designed to enhance biodegradation of refuse by providing favorable conditions for microorganisms. Effect of elevated temperature and moisture on possibility of lignin degradation is studied in this work. Synthetic and newspaper lignin were preheated and then inoculated with anaerobically digested sludge. Newspaper in distilled water exposed to 95Â°C for 48 hours released 8 times more of solubilized lignin then non preheated newspaper. Moreover lignin monomers were detected as a result of 95Â°C pretreatment indicating the positive effect of high temperature on the providing lignin in more bioavailable form for microbes. Digested sludge inocula was found to be capable of lignin monomers degradation as well as low but significant mineralization of synthetic lignin with approximately 6% of carbon originated from lignin mineralized into methane and carbon dioxide. An exponentially increasing trend for lignin monomers solubilization as a function of temperature was observed for three types of substrate, synthetic lignin, cardboard, and newspaper with the highest rate of solubilization for newspaper. Results of this study suggest that some lignin degradation can occur at conditions typical for bioreactor landfills.
Master of Science

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29

Zichová, Miroslava. "Příprava mikrobiálních metabolitů z odpadních surovin." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-295715.

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In this thesis the use of waste materials for the microbial production of important metabolites is reported. The first part is focused on the use of waste paper (a lignocellulosic material) as a non-traditional source for the production of bioethanol. The second part is focused on the immobilization of cellulolytic enzymes, which are used for the hydrolysis of lignocellulosic materials. First, the waste paper (cardboard) was pre-treated using a blender and a vibratory mill. The pre-treated cardboard was used for the production of ethanol by the method of simultaneous saccharification and fermentation. This method was optimized with free cells of Saccharomyces cerevisiae. Then strains suitable for the immobilization were selected. Strains of S. cerevisiae and Pichia kudriavzevii were immobilized by encapsulation into the polyvinyl alcohol carrier and tested again for the ethanol production by simultaneous saccharification and fermentation. In the second part of the work a carrier from waste polyethylene terephthalate bottles was prepared and used for the immobilization of the cellulolytic complex. The basic characteristics were determined, such as optimal pH and optimal temperature, storage, operational and thermal stability, enzyme kinetics and the mode of action of the enzyme. Compared to two other commercial carriers this carrier showed to be suitable for the immobilization of the cellulolytic complex.

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Brummer, Vladimír. "Enzymatická hydrolýza odpadní papíroviny - zdroj suroviny pro výrobu kapalných biopaliv." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2010. http://www.nusl.cz/ntk/nusl-216578.

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This master’s thesis is aimed at process of enzymatic hydrolysis of lignocellulosic material – waste paper as a source of raw material for production of liquid biofuels. In the theoretical part of this work are summarized previously used methods of hydrolysis and lignocellulosic materials used for the process of hydrolysis as a source of fermentable sugars for fermentation technology. The different types of waste paper are evaluated from the composition and usability with consideration to the papermaking process in order to select the appropriate type of waste paper for the enzymatic hydrolysis process. In the next part of this work are suggested technological premises and procedures for the preparation of raw materials and the subsequent enzymatic hydrolysis of these pre–treated materials. In the experimental part were optimized parameters of enzymatic hydrolysis using the Novozymes company enzyme package. Enzymatic degradation of cellulose to reducing sugars was observed using Somogyi – Nelson method. For the verification of hydrolysis conditions were used model materials with high cellulose content – pulp and filter paper. Conditions, which seems to be the best after testing on the model materials, were verified on specific waste paper materials – offset cardboard, recycled paper, matte MYsol paper and for comparison again on model materials – pulp and filter paper. The highest yields was achieved with the use of cardboard, which was further tested using various combinations of pretreatment to material for purpose of increase the yields of hydrolysis.

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31

Lane, Jonathan. "An investigation into the novel application of high power ultrasound on the deinking of mixed office waste paper." Thesis, Open University, 1998. http://oro.open.ac.uk/57872/.

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The current paper recycling processes are surveyed pointing out the major stages and the variety of chemical/mechanical treatments the fibres undergo. The reduction or replacement of chemical/mechanical treatments presents possible advantages in prolonging fibre life. The results from recycled office waste which has been treated with ultrasound show a change in the particle size distribution of toner particles - making these particles easier to remove using established flotation techniques. Particle size distributions were measured using image analysis on thin (20gsm) paper handsheets. To establish the affect of sonication on fibres, a variety of virgin fibres were obtained from UK Paper, Sittingbourne. Results from virgin fibres which have been treated using ultrasound indicate an absence of cutting compared to conventional techniques. Fibres were found to have the same average length (0.6mm) after ultrasound treatment as the control sample, refined fibres were reduced to approximately 0.3 mm in length. Freeness decreased in both virgin sonicated and refined sonicated samples. The decrease in freeness was accompanied by an increase in the strength properties of both categories of fibres. Experiments with a prepared office waste furnish showed that ultrasonic treatment could decrease the size distribution of fused toner particles. The control sample had an average size of 80.9 um, after 1 minute sonication this was decreased to 54.9) um, decreasing further to 46.8)um after 2 minutes sonication. After demonstrating that ultrasound could decrease the particle distribution of the prepared office waste a more realistic and variable furnish was used. The experiments were conducted at room temperature, 50°C and 75°C. These temperatures were chosen to study the behaviour of fused toners as it approaches and exceeds its glass transition point, essentially the melting point of an amorphous polymer. It was found that the toner is easier to remove as the glass transition temperature is approached. Ultrasound is effective in breaking up large toner particles and detaching particles smaller than 25 microns in diameter.

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32

Bhinge, Deepak. "Color removal from pulp and paper wastes by coagulation." Thesis, Virginia Tech, 1986. http://hdl.handle.net/10919/41569.

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Coagulation studies were conducted to determine an appropriate treatment approach to remove color and organic carbon from the pulp and paper wastes from the Union Camp Corporation, Franklin, Va.

Based on a preliminary analysis of the data collected during this research, either alum or ferric chloride may be used to remove color from pulp and paper wastes. An effluent with final residual color less than 5 color units can be generated using PAC treatment after flocculating certain waste streams with alum or ferric chloride. Higher molecular weight organics (above 5K mass units) showed a near complete removal by coagulation.

It is expected that alum coagulation would involve a lesser cost in pH adjustment as compared to ferric chloride coagulation. Alum sludge dewatered and thickened more rapidly than the iron sludge; however, after mechanical dewatering, the alum cake had a slightly greater moisture content than the sludge produced after ferric chloride coagulation.

Master of Science

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33

Hanan, Deirdre. "The best practicable environmental option for paper waste management in geographically isolated communities." Thesis, Open University, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.552799.

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Waste management generally, and paper waste specifically, are important issues. The problems finding suitable landfill sites and the legislative and environmental needs for alternatives to landfill make research into this field important. Isolated communities have specific issues related to the treatment of waste. Available sites for landfill are limited, the community is often economically dependent on tourism and local alternatives to landfill are limited, whilst transport across the barrier is expensive. The aims of the research were to find the Best Practicable Environmental Option (BPEO) for paper waste management in isolated communities and to produce a tool that could be used by other areas to assess their own paper waste management practices. During this research, three geographically isolated areas were chosen as study areas and the financial, environmental and legislative aspects of the current household waste management systems were examined. A financial model was produced and used in the case study areas. The environmental emissions were modelled by the use of WRA TE, a Life Cycle Analysis programme developed by the Environment Agency for England and Wales. The financial, legislative and environmental impacts social factors of the six scenarios were examined by a Multi-Criteria Decision Analysis workshop consisting of residents from one of the case study areas. The conclusions of the research were that: • MCDA can be used to combine LCA, financial, legislative and social information to assist in determining BPEO for managing waste in isolated communities, • The use of the MCDA panel allowed the local community to be involved in the decision-making process, • Isolated communities have specific issues in regard to waste management, • The research tool was valuable in finding the most sustainable paper waste management solution for the area, • Local solutions are to be preferred financially, environmentally and socially although local or national taxes can distort the financial position.

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ORTEGA, JULIO CESAR BIZARRETA. "EVALUATION OF THE POTENTIAL USE OF WASTE PAPER SLUDGE IN CAPILLARY BARRIER SYSTEMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=15396@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE APOIO A NÚCLEOS DE EXCELÊNCIA
Esta pesquisa esta orientada a avaliar o potencial de uso de um resíduo da indústria da fabrica de papel, localizada no estado de Rio de Janeiro, em sistemas de barreiras capilares para aterros sanitários. A utilização do resíduo da indústria de papel (RIP) trace um beneficio ambiental e econômico, pois na atualidade os materiais comumente usados como cobertores têm elevados custos. Neste estudo se realizam uma caracterização do RIP e uma simulação numérica usando o programa VADOSE/W 2007. O RIP é constituído por uma parte mineral e outra de fibra orgânica. A parte mineral é aproximadamente 70%, composto principalmente de calcita e aragonita, atuando como cimento e cobrindo quase por completo as fibras. O RIP tem um elevado teor de umidade inicial e uma elevada contração sim apresentar trincas no processo de secagem. Ensaios de laboratório mostram valores de permeabilidade saturada na ordem de 10-8 m/s para amostras no lado úmido da curva de compactação. Ensaios de curva de retenção de umidade usando a técnica de papel de filtro mostram uma diferença substancial em relação a outros RIPs encontrados na literatura pelo elevado valor de entrada de ar da ordem de 1000kPa. Simulações numéricas baseadas nas propriedades não saturadas do RIP mostram que ele pode ser utilizado como material fino de uma barreira capilar; sendo o contraste de permeabilidades não saturadas e sucção inicial chaves na seleção do material grosso. O programa VADOSE/W 2007 constitui uma ferramenta útil para á avaliação do funcionamento de sistemas de barreiras capilares onde se incluem condições climáticas.
This research is oriented to evaluate the potential use of a waste industry manufactures of paper, in the state of Rio de Janeiro for capillary barrier systems for sanitary landfills. The use of waste paper industry (WPI) brings an environmental and economic benefit, because in actuality the cover materials have high costs. In this study, is made a characterization and a numerical simulation of WPI using the program VADOSE/W 2007. WPI is composed of one part mineral and other organic fiber. The mineral part is about 70%, composed mainly of calcite and aragonite, acting as cement and covering almost completely the fibers. RIP has high initial moisture content and high contraction but does not have cracks in the drying process. Laboratory tests show values of saturated permeability in the order of 10-8 m/s for samples in the wet side of compaction curve. Testing curve moisture retention using the filter paper method shows a substantial difference compared to other WPIs in the literature by the high Air Entry Value (AEV) of the order of 1000kPa. Numerical simulations based on the properties of saturated RIP show that it can be used as fine material for a capillary barrier, and the contrast of unsaturated permeability and suction initial key in the material selection. Numerical simulations based on unsaturated properties of WPI showed that it can be used as material for a capillary barrier, and was verified that the contrast of unsaturated permeability and suction initial are key in the material selection, and was verified that the program VADOSE/W 2007 is a useful tool for evaluating the operation of capillary barrier systems which include climatic conditions.

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35

Ajersch, Michael. "Mechanisms of pulp loss in flotation deinking /." *McMaster only, 1997.

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36

Mfenyana, Nondumiso Gloria. "An investigation into conditions that enable or constrain sustainable paper usage at Rhodes University." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1004217.

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The interest in this study was initiated by the rapid global transition of paper usage to digital systems in teaching and learning at tertiary institutions, particularly those that are signatories to the Talloires Declaration, which include Rhodes University (RU). It was discovered that there are two earlier studies (Leslie et al. 2009; Amutenya et al. 2009) that investigated and proposed recommendations towards sustainable paper usage at Rhodes University (RU). This study then investigated the response of RU to the proposed recommendations of the above mentioned studies and evaluated the conditions that promote and constrain sustainable paper usage in teaching and learning, and the attitudes of users thereof.

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Zimmerman, Sara Phyllis. "An Analysis of Socioeconomic Effects on Scrap Paper Recycling Participation." PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/5058.

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The greatest appreciation is extended to all who contributed valuable time to assist with this project. In particular, Barry Messer, from the Recycling Education Project at Portland State University, who recommended study ideas and provided integral information; Bruce Walker, from the City of Portland, who granted many interviews and was always willing to answer questions; Steve Apotheker, from Resource Recycling, who invited me to use the office library and spent time discussing current recycling issues; Deborah Adams, from Metro, who furnished me with essential data; and Wess Brenner, from the Academic Computing Center, who contributed substantial time to help in the analysis of the data. Additionally, Mara Tableman, from the Mathematical Sciences Department and Dr. Robert Fountain, from the Statistics Consulting Laboratory provided considerable advise about statistical procedures. I also deeply thank my parents, Rob Allerman, Jennifer Wheelan, and other friends and family who supported me throughout the completion of this document. Joel Freedman particularly, provided continual encouragement, unending patience and sound counsel. From the Geography department, I extend my sincere gratitude to Carolyn Perry and my committee, Joseph Porascky, Thomas Harvey and most importantly, my advisor, Dr. Teresa Bulman.

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Schirmer, Matthias. "Biomass and waste as a renewable and sustainable energy source in Vietnam: Review paper." Technische Universität Dresden, 2014. https://tud.qucosa.de/id/qucosa%3A28885.

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Due to Vietnam’s economic development its energy demand will continue to rise by 12–16% annually over the next few years. The government has realized that supply problems in the energy sector pose a significant threat to further development. Therefore, it is making concerted efforts to modernize the existing energy sector and expand the generating structure. There are ambitious expansion plans in the field of renewable energy sources, too. Owing to its very high potential, biomass could play a key role in energy production. This paper attempts to analyze the current status of biomass based energy production in Vietnam addressing variety of aspects such as biomass potential, legal framework as well as financial aspect. Section 4 contains an overview of ongoing bioenergy projects. Instead of providing a complete picture, these examples are intended to illustrate the various ways in which biomass can be used in different economic sectors. Finally existing barriers as well as action to incentivise bioenergy are discussed.
Do phát triển kinh tế, nhu cầu năng lượng của Việt Nam sẽ tiếp tục tăng 12-16% mỗi năm trong vài năm tới. Chính phủ đã nhận ra rằng vấn đề cung cấp trong lĩnh vực năng lượng gây ra một mối đe dọa đáng kể cho sự phát triển tiếp theo. Vì vậy, có các nỗ lực để hiện đại hóa ngành năng lượng hiện có và mở rộng cấu trúc sản sinh năng lượng. Cũng có những kế hoạch mở rộng đầy tham vọng trong lĩnh vự nguồn năng lượng tái tạo. Do có tiềm năng rất cao, sinh khối có thể đóng một vai trò quan trọng trong sản xuất năng lượng. Bài viết này cố gắng phân tích tình trạng hiện tại của sản xuất năng lượng sinh khối tại Việt Nam giải quyết nhiều khía cạnh nhưtiềm năng sinh khối, khuôn khổ pháp lý cũng như các khía cạnh về tài chính. Tổng quan về các dự án năng lượng sinh học đang diễn ra được trình bày trong phần 4. Thay vì cung cấp một bức tranh hoàn chỉnh, các ví dụ được dùng để minh họa cho những cách khác nhau, trong đó sinh khối có thể được sử dụng trong các lĩnh vực kinh tế khác nhau. Rào cản cuối cùng hiện tại cũng nhưhành động để khuyến khích năng lượng sinh học sẽ được thảo luận.

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Shakourian, Gelareh. "Enhanced De-inking and Recyclability of Laser Printed Paper by Plasma-Assisted Fiber Coating." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10572.

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Office waste paper is one of the fastest growing segments of the recycled fiber industry. Toner particles are rigid, insoluble and difficult to disperse and detach from fibers. Therefore papers made from recycled office waste having high toner content will contain noticeable ink particles. This work will consider an alternative way of efficient de-inking using plasma polymers which will not affect the fibers chemically or mechanically. The focus is development and characterization of plasma-deposited films to serve as a barrier film for the adhesion of ink toner to the paper fibers and thereby enhance ink lift off from the fibers. The plasma treated paper is coated with fluorocarbon (PFE) and polyethylene glycol (PFE) films, with constant thickness of PFE and varying the thickness of PEG by 1500, from 1500 to 4500, for the three cases studied (PFE greater than PEG, PFE=PEG, PFE less than PEG). Handsheets were made using virgin fibers to eliminate effects of fillers. Once the sheets were coated and printing performed, they were re-pulped and both the slurry and the de-inking surfactant were placed in a flotation cell. Handsheets were made from the collected foam and stock and were scanned for particle count. The results indicated higher ink loss for the cases with increased thickness of polymer films. A handsheet with a 7500 film (PFE = 3000 and PEG = 4500) showed 61% ink removal compared to 38% for handsheets with no film deposited. There was also less material loss for the cases with higher polymer film thickness.

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Rothpfeffer, Caroline. "From wood to waste and waste to wood : aspects on recycling waste products from the pulp mill to the forest soil /." Uppsala : Dept. of Forest Soils, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200783.pdf.

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Méndez-Sánchez, Noemi C. Lange Clifford R. "Biodecolorization of paper mills wastewater using anaerobic composting." Auburn, Ala, 2009. http://hdl.handle.net/10415/1862.

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42

Neufeld, Josh D. "Development of a quantitative method for functional gene detection in pulp and paper wastewater treatment systems." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33430.

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The recent development of culture-independent methods has revolutionized the study of complex microbial communities such as those present in activated sludge treatment systems. DNA probes that hybridize to genes coding for key enzymes that catalyze microbial processes have been widely used. Can such probes be used to quantify target genes and thus quantify the potential of a microbial community to carry out a reaction of interest?
Optimal conditions for DNA extraction, probe validation, hybridization, and activity measurements were determined for the pulp and paper treatment system environment under study. Using gene probes for key denitrification genes (nirS, nirK), the correlation between denitrifiers and denitrification activity in an enrichment culture and activated sludge samples was tested. The same correlation between nitrogen fixation and nitrogen-fixing bacteria in primary clarifiers was assessed using a probe for the gene encoding a component of the nitrogenase enzyme (nifH). This work was successful in establishing the correlation between gene numbers and their corresponding enzymatic activity and thus supports the quantitative hybridization approach for the monitoring of microbial communities. (Abstract shortened by UMI.)

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43

Shen, Jiacheng. "Modeling and Production of Bioethanol from Mixtures of Cotton Gin Waste and Recycled Paper Sludge." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/30264.

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In this study, the hydrolytic kinetics of mixtures of cotton gin waste (CGW) and recycled paper sludge (RPS) at various initial enzyme concentrations of Spezyme AO3117 and Novozymes NS50052 was investigated. The experiments showed that the concentrations of reducing sugars and the conversions of the mixtures increased with increasing initial enzyme concentration. The reducing sugar concentration and conversion of the mixture of 75% CGW and 25% RPS were higher than those of the mixture of 80% CGW and 20% RPS. The conversion of the former could reach 73.8% after a 72-hour hydrolysis at the initial enzyme loading of 17.4 Filter Paper Unit (FPU)/g substrate. A three-parameter kinetic model with convergent property based on enzyme deactivation and its analytical expression were derived. Using nonlinear regression, the parameters of the model were determined from the experimental data of hydrolytic kinetics of the mixtures. Based on this kinetic model of hydrolysis, two profit rate models, representing two kinds of operating modes with and without substrate recycling, were developed. Using the profit rate models, the optimal enzyme loading and hydrolytic time could be predicted for the maximum profit rate in ethanol production according to the costs of enzyme and operation, enzyme loading, and ethanol market price. Simulated results from the models based on the experimental data of hydrolysis of the mixture of 75% CGW and 25% RPS showed that use of a high substrate concentration and an operating mode with feedstock recycle could greatly increase the profit rate of ethanol production. The results also demonstrated that the hydrolysis at a low enzyme loading was economically required for systematic optimization of ethanol production. The development of profit rate model points out a way to optimize a monotonic function with variables, such as enzyme loading and hydrolytic time for the maximum profit rate. The study also investigated the ethanol production from the steam-exploded mixture of 75 wt% cotton gin waste and 25 wt% recycled paper sludge at various influencing factors, such as enzyme concentration, substrate concentration, and severity factor, by a novel operating mode: semi-simultaneous saccharification and fermentation (SSSF) consisting of a pre-hydrolysis and a simultaneous saccharification and fermentation (SSF). Four cases were studied: 24-hour pre-hydrolysis + 48-hour SSF (SSSF 24), 12-hour pre-hydrolysis + 60-hour SSF (SSSF 12), 72-hour SSF, and 48-hour hydrolysis + 12-hour fermentation (SHF). SSSF 24 produced higher ethanol concentration, yield, and productivity than the other operating modes. The higher temperature of steam explosion favored of ethanol production, but the higher initial enzyme concentration could not increase the final ethanol concentration though the hydrolytic rate of the substrate was increased. A mathematical model of SSSF, which consisted of an enzymatic hydrolysis model and a SSF model including four ordinary differential equations that describe the changes of cellobiose, glucose, microorganism, and ethanol concentrations with respect to residence time, was developed, and was used to simulate the data for the four components in the SSSF processes of ethanol production from the mixture. The model parameters were determined by a MATLAB program based on the batch experimental data of the SSSF. The analysis to the reaction rates of cellobiose, glucose, cell, and ethanol using the model and the parameters from the experiments showed that the conversion of cellulose to cellobiose was a rate-controlling step in the SSSF process of ethanol production from cellulose.
Ph. D.

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44

Ganta, Madhuri. "Anaerobic digestion of pulp and paper mill solid wastes : evaluation of operational parameters and microbial diversity." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/27081.

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45

Brandao, Clarissa P. "Trashures." Atlanta, Ga. : Georgia State University, 2009. http://digitalarchive.gsu.edu/art_design_theses/41/.

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Thesis (M.F.A.)--Georgia State University, 2009.
Title from title page (Digital Archive@GSU, viewed July 20, 2010) Stan Anderson, committee chair; Constance Thalken, Joseph Peragine, committee members. Includes bibliographical references (p. 55).

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46

Holbery, James D. "Recycle polymer characterization and adhesion modeling /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/10586.

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47

Lee, Patrick Seo Thin. "A feasibility study of a recycled paper scoop, a dosing device for synthetic powder laundry detergents /." Online version of thesis, 1993. http://hdl.handle.net/1850/11592.

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48

Frigon, Dominic. "Molecular and phenotypic characterization of the microbial communities in two pulp and paper wastewater treatment systems." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29803.

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Phylogenetic hybridization and phenotypic fingerprinting were applied to the analysis of bacterial communities in wastewater treatment systems. These approaches were aimed at (i) developing monitoring tools able to foresee operational problems, and (ii) providing the rationale to optimize the operation of bioreactors. The work presented is intended to first describe the community found in two reactors treating pulp and paper mill effluent, and second evaluate the possibilities of these techniques with respect to the development of new monitoring tools.
Phylogenetic membrane hybridization showed that the bacterial communities were dominated by Alpha and Beta Proteobacteria, a structure probably linked to the low F:M ratio. Other important factors determining the community structure were the proportion of COD in the high molecular weight fraction, the sludge age, phosphate addition, and the concentration of specific compounds (alcohols, phenols, volatile fatty acids) in the influent. The community structure partly determined the sludge characteristics demonstrating its potential value in the assessment of reactor performance. The results obtained by phylogenetic membrane hybridization suggest that the probes used in a monitoring tool would not need to be targeted to the species level to provide relevant information. However, they also suggest that the technique is more sensitive to changes in population density as opposed to changes in bacterial metabolism.
Phenotypic fingerprinting measured a smaller difference between the communities of the two reactors studied than what was measured by phylogenetic membrane hybridization. However, differences in heterotrophic activities observed between the two communities were linked to differences in influent composition.

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Do, Thi Kim Chi. "Plastic Waste Management and Policy in the Fast Food Industry in Vietnam." Thesis, Griffith University, 2021. http://hdl.handle.net/10072/403642.

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The fast food industry (FFI) has been rapidly developing over the past few decades due to economic development and an increase in the "on the go" consumption culture. This industry consumes a considerable number of single-use items (SUIs), including single-use plastic items (SUPIs) and single-use paper items (SUPaIs), for the takeaway culture, which treats plastics as waste rather than a valuable resource. The frequent use of SUPIs leads to a significant amount of plastic waste ending up in the ocean. Within this context, Vietnam is one of the focus countries contributing considerably to plastic ocean (Akenji et al., 2019b). While regulations and policy interventions related to plastic packaging waste or SUPIs in the FFI have been limited, research into SUPIs in the FFI also has not been undertaken in Vietnam. This research aims to improve plastic waste management and the use and disposal of SUPIs in the FFI in Vietnam. First, the research reviewed intervention policies on the management of SUPIs in selected regions (the EU, Singapore, India, Indonesia) to recommend policy measures to manage plastic waste in the FFI in Vietnam. Second, this research determined the components and weight of SUPIs consumed and disposed of in the FFI in Ho Chi Minh City (HCMC), Vietnam. The results show that six fast food companies (Lotteria, KFC, Jollibee, Popeyes, Texas Chicken, and McDonald's) in HCMC generated approximately six tons of waste per day. Among them, SUPIs presented from 1.1 t/d to 2.2 t/d and SUPaIs were around 1.4 t/d to 1.6 t/d. Third, the research also surveyed 273 customers and 77 managers on their Knowledge, Attitude, and Practice (KAP) about the use and the disposal of SUPIs in the FFI in HCMC, with the results showing that the knowledge of customers and managers about the impacts of the use of SUPIs on the environment is positive but still limited. The next step, the research examined key stakeholders' choices on the recommended policy measures for SUPIs in the FFI, which were implicated from the first, second, and third objectives of the thesis. This fourth objective of the thesis was carried out by interviewing 37 people in five stakeholder groups (customers, restaurant managers in FFI, plastic manufacturers, and policymakers). Finally, the research also calculated the impacts of the two recommended policy interventions, including ceasing the use of the identified unnecessary SUPIs in the six studied FFCs and standardising the weight of each type of SUPI in the FFI. Consequently, the study is optimistic that by adopting the policy recommendations, a substantial amount of plastic waste which is currently being generated by the FFI and released into the environment each year will be prevented.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Eng & Built Env
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50

Thompson, Gill. "Development of strategies to control bulking in activated sludge treatment of paper and board mill waste." Thesis, University of Birmingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425964.

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Dissertations / Theses on the topic 'Waste paper'

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