Gotowe bibliografie tematyczne / Sewage – Purification – Biological treatment

Gotowa bibliografia na temat „Sewage – Purification – Biological treatment”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 26 stycznia 2023

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Artykuły w czasopismach na temat "Sewage – Purification – Biological treatment"

Dzhumagulova, Nazira, Ilya Svetkov, Vladimir Smetanin i Nguyen Dinh Dap. "Fractal analysis of biological wastewater treatment efficiency". MATEC Web of Conferences 251 (2018): 06005. http://dx.doi.org/10.1051/matecconf/201825106005.

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The purpose of the present research was to enhance the efficiency of biological wastewater treatment through the direct impact on the metabolism of activated sludge. In the course of research, species and quantitative composition of biological community of activated sludge in aeration tanks during wastewater purification process was studied. Comparative analysis was carried out for linen production wastewater and household sewage. Possible application of biological treatment in linen production was evaluated. Proposals were developed on creation of controllable biological treatment facility. In this paper, biological methods are shown to be efficient for household sewage treatment. Comparative analysis was carried out for linen production wastewater and household sewage. Possible application of biological treatment in linen production was evaluated. Proposals were developed on creation of controllable biological treatment facility.

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Voigtländer, G., i E. P. Kulle. "An improved small sewage treatment plant for biological purification of wastewater". Water Science and Technology 29, nr 12 (1.12.1994): 23–29. http://dx.doi.org/10.2166/wst.1994.0575.

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The paper presents a small sewage treatment plant (package plant) operating without additional energy. Purification of sewage is achieved in a three-step process: sedimentation tank, anaerobic reactor and wastewater pond or aerobic reactor. The efficiency of the anaerobic reactor - in contrast to the efficiency of a common septic tank - is significantly increased by using fixed biomass systems. Further degradation of sewage compounds by adhering microorganisms occurs in pond or aerobic reactor. The bed for the aerobic biomass is made of a semipermeable plastic film and arranged in order to ensure simultaneous supply of oxygen. The three pilot plants are showing different results. The main aims of research i.e. lowering of operational costs, energy supply, minimizing of maintenance expenditure and cleaning work, reliability of degradation efficiency have been achieved so far for the anaerobic reactor.

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Heinzmann, B. "Phosphorus recycling in sewage treatment plants with biological phosphorus removal". Water Science and Technology 52, nr 10-11 (1.11.2005): 543–48. http://dx.doi.org/10.2166/wst.2005.0734.

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In this paper, phosphorus balances are calculated for the wastewater purification and sludge treatment stages for wastewater treatment plants (WWTPs) applying Enhanced Biological Phosphorus Removal (EBPR). The possible P-recovery potential is then estimated and evaluated regarding different locations along the process of wastewater purification and sludge treatment, taking the different phosphorus bonding forms into account. Caused by the more favourable bonding forms in the excess sludge as well as possibly also in the sludge ash a recovery of the phosphorus seems especially favoured for WWTPs with EBPR. The processes available for a P recycling are named, and special regard is given to the Phostrip-process, which is a possible recycling process already tested in practice. Further R&D demand consists in basic research regarding disintegration, fermentation or acidic total digestion of excess sludge followed by phosphorus precipitation including separation of the precipitates, MAP-precipitation and separation from digested sludge and on the ability to extract phosphorus and heavy metals from sewage sludge ash. These investigations are a precondition to enable purposeful process developments. At the present state the cost of recycled phosphorus earned from wastewater, sludge and ash, respectively, are a multiple higher than the costs for raw phosphate taking into account the suitable processes. Thus, up to now no phosphorus recycling with a defrayal of costs is possible. The future importance of phosphorus recycling will depend on the market price for raw phosphate, the recycling costs and, furthermore, on the general political framework.

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MURADYaN, Yu V., i S. Yu TEPLYKh. "AFTER TREATMENT DOMESTIC SEWAGE WITH ERSHOVA LOADING". Urban construction and architecture 2, nr 2 (15.06.2012): 59–62. http://dx.doi.org/10.17673/vestnik.2012.02.11.

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Widespread now technological scheme and construction technology of wastewater do not provide normative qualitative parameters that correspond to the requirements of the water fish-economical ponds.The limited financing of construction of new sewage is the main method of improving the reconstruction and/or intensification of existing sewage systems.Now for the intensification of the process of purification of biologically treated wastewater purification filter with the proposed design of the load which ershov fully satisfies modern requirements on quality of discharged waste water into a reservoir.

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Wu, Rui, Li Gang Xu i Dan Chen. "Study on Biological Purification Effect on Tail Water from Sewage Treatment Plant at Small-Scaled Town, South Jiangsu". Applied Mechanics and Materials 641-642 (wrzesień 2014): 384–89. http://dx.doi.org/10.4028/www.scientific.net/amm.641-642.384.

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As a cost-effective technology, using biological treatment technology to treat tail water has been gradually promoted in and abroad. Biological treatment technology uses the organic combination of water ecosystem to remove the organic pollutants and pollutants such as N and P which cause water eutrophication. This paper takes Jiangyin City Xinqiao Town Sewage Treatment Plant as example to construct bio-ecological combined constructed wetlands system near natural river course to treat tail water from sewage treatment plant and investigates the removal efficiency of combination process for COD, ammonia, TN and TP in tail water. The research indicates that bio-ecological combined constructed wetlands system has good removal efficiency for pollutants in tail water. And the average removal rate of COD, ammonia, TN and TP are 29%, 31%, 18%, and 8%; the average effluent concentration of them are 35.54mg/L, 0.97mg/L, 10.77 mg/L, and 0.11 mg/L. The result exactly matches the first grade A standard of Urban Sewage Treatment Plant Pollutant Discharge Standard (GB18918-2002). It has great potential for tail water treatment and is suitable for rural regions. The research result provides both the data and theoretical basis for improvement of biological treatment technology of tail water from sewage treatment plant, and also provides direct theoretical basis and practical experience for promotion and research of wetlands ecosystem.

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Kettern, J. T. "Biological or Chemico-Physical Landfill Leachate Purification - An Alternative or a Useful Combination". Water Science and Technology 26, nr 1-2 (1.07.1992): 137–45. http://dx.doi.org/10.2166/wst.1992.0394.

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The passing of the “General Administrative Regulations on Minimum Requirements for the Discharge of Sewage to Waters”, and particularly Annex 51, has far-reaching implications for landfill leachate treatment. The administrative regulations prescribe limits which entail treatment according to good engineering practice and state-of-the-art technology. The paper describes leachates from different types of landfill, discusses state-of-the-art leachate treatment technology and presents some recent developments.

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Fesik, L. A., N. V. Sorokina, E. А. Geraskina i T. S. Airapetian. "AN ANAEROBIC-AEROBIC BIOLOGICAL TREATMENT OF WASTEWATER AT THE LOW-PRODUCTIVITY PLANT". Bulletin of Odessa State Academy of Civil Engineering and Architecture, nr 80 (3.09.2020): 122–31. http://dx.doi.org/10.31650/2415-377x-2020-80-122-131.

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Abstract. The urgency of the problem of local biological treatment of domestic wastewater from housing in non-canalized areas with improving the quality of treated wastewater to the level of requirements for discharge into fishery bodies of water is considered. The analysis of the state of local wastewater treatment is given. Existing technological schemes and methods of local sewage, which are used for sewage treatment, are considered. The results of theoretical and experimental studies of a complex of a local anaerobic-aerobic biological treatment of domestic wastewater from housing in non-canalized areas at the low-productivity plants are presented. The results of theoretical and experimental researches of complex of local anaerobic-aerobic biological purification of domestic wastewater of habitation in non-canalized areas at the low-productivity plants are given. On the basis of the analysis of work and embodiment of low-productivity plants, used in home and foreign practice of local treatment of domestic wastewater the expediency of application flowing multistage anaerobic-aerobic biological purification of domestic wastewater with use of communities of attached and free-swimming microorganisms is shown. The proposed low-productivity plant, which includes a three-stage aerobic biological treatment of anaerobically treated wastewater is described. The use of ruff fillers for the retention of hydrobionts gives the opportunity to clear salvo discharge, rapid restoration of the activity of the ruff fillers (for example, in power outages). The ruff fillers make it possible to organize an appropriate trophic chain of hydrobionts, which dramatically reduces the amount of excess biomass and the removal of suspensions in treated wastewater. Using the experiments in laboratory conditions and at real industrial treatment plant of a new design there were received parameters of work of stages of anaerobic and aerobic biological purification, the law of nitrification and denitrification processes, the law of specific speed of oxidation of organic pollution in specific conditions of anaerobic-aerobic technology; the opportunity of reception of quality of treated wastewater at the level of the requirements of the specifications for dump of drains in fishing reservoirs is proved.

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STEPANOV, S. V., Yu E. STAShOK i N. V. NOEV. "RESEARCHES ON BIOMEMBRANE PURIFICATIONAND DEMINERALIZATION OF WASTE WATERS AT SYZRAN OIL REFINERY". Urban construction and architecture 2, nr 1 (15.03.2012): 55–58. http://dx.doi.org/10.17673/vestnik.2012.01.10.

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There are given the research results of biomembrane waste water purification at Syzran Oil Refinery and demineralization of biologically treated sewage waters by the method of reversible electrodialysis. We compared the purification eﬃciency on the membrane bioreactor with ethanol dosing (in order to get deeper denitrification) and without it and the purification without adding household drain as well. It is shown that biomembrane technology combined with sorption tertiary treatment makes it possible to meet the requirements of the Russian Federation norms to the quality of treated sewage. The results of the experiment on the demineralization of biologically treated sewage waters using the method of reversible electrodialysis are given. We have concluded that the recycle systems of the plant can be fed with demineralised desalted water.

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Csépai, L. "Fully Biological Wastewater Treatment without Energy Consumption". Water Science and Technology 22, nr 3-4 (1.03.1990): 331–34. http://dx.doi.org/10.2166/wst.1990.0219.

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By two Sewage Treatment Plants it is demonstrated that a fully biological wastewater treatment without external energy supply is possible provided there is a sufficient natural gradient to guarantee a free flow through the entire plant. Both plants have now been in operation for more than 2 years. Test results show a very good purification efficiency. Elimination of BOD5 is over 93%, of COD 84%, of TOC 86%, of NH4 66 % and that of nitrogen totals 29%. The results of the two-year operation of both plants prove that also smaller units allow for meeting all requirements to obtain a good purification efficiency. Especially pre-settling and final clarifying ponds with interposed trickling filters represent a very simple but economic addition to the ample variety of modern wastewater techniques. It has also been demonstrated that, when planning wastewater treatment plants, every effort should be made to adjust the hydraulic longitudinal section to the existing area conditions, even at the risk of increased building costs. As far as economic considerations are concerned, a unit operating without energy consumption certainly proves advantageous. At the same time it offers a running guarantee, which is equally important, especially in case of smaller units. Particularly if local communities experience prolonged economic difficulties such considerations gain increasing priority. In addition to all these advantages the plants show a high buffering efficiency, minimum maintenance requirements and very low running costs.

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Su, Rong Jun. "Study on Treatment of Canteen Wastewater Using Rotating Biological Contactor". Advanced Materials Research 113-116 (czerwiec 2010): 1597–600. http://dx.doi.org/10.4028/www.scientific.net/amr.113-116.1597.

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Rotating biological contactor (RBC) has good effect for treating wastewater, while it is rarely reported to be used for treating canteen wastewater in frigid area as in this paper. After having cultivated the biofilm, this article studied the purification effect on disposing of sewage from dinning hall by RBC and its affecting factors such as input organic loading, stages and temperature. The results indicated that even in low ambient temperature, the COD removal rate can achieve an average value of 70% and NH4-N elimination rate is over 80% in average which displayed better effects. Microscopic observations showed that there were plenty of and varies kinds of microorganisms displayed in order in bio-discs.

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Rozprawy doktorskie na temat "Sewage – Purification – Biological treatment"

Whitehead, Alan Joseph. "Experimental culture of duckweed (Lemnaceae) for treatment of domestic sewage". Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26665.

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The culture of the floating aquatic plant, duckweed (Lemna minor), as an agent of domestic sewage treatment was studied in a clarification lagoon at Duncan, British Columbia, during the summer of 1986. Duckweed was grown in plastic fabric tanks (3700 L volume, 1.85 m deep, 2.25 m² water surface area) receiving 290 L of sewage per day or 12.8 d hydraulic retention time. Three treatments were tested: cropped duckweed, uncropped duckweed, and no duckweed. Water quality, plant growth and tissue composition were monitored on the basis of weekly sampling. Removals of VSS, COD, total-N and total-P were greater in the presence than in the absence of duckweed. Unmeasured imports of N and P masked the effect of plant uptake on reducing nutrient concentrations in the tank effluents. Sustainable duckweed yields were possible at both cropping rates, despite a severe infestation of aphids. Dry matter yields of 2.0 g/m².d and 6.4 g/m².d were obtained at the 15%/week and 50%/week cropping rates, respectively. Duckweed contained 6.1 - 6.4% N and 1.1 - 1.4% P (dry wt.). Plant harvest removed 0.14 g N/m².d and 0.03 g P/m².d at the 15%./week and 0.31 g N/m².d and 0.07 g P/m².d at the 50%/week cropping rates. Cropping increased the fraction of total-N and total-P loading that could be removed via plant uptake. Performance of the experimental treatments is analyzed in the light of concentration data, mass balances, and mass flux estimations. Possible sources of unmeasured N and P imports are discussed, and recommendations for future research are provided. The results suggest that duckweed may hold promise under certain conditions as a means of polishing sewage lagoon effluent.
Applied Science, Faculty of
Chemical and Biological Engineering, Department of
Graduate

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Palazolo, Paul Joseph. "Use of genetic algorithms in bounded search for design of biological nitrification/denitrification waste treatment systems". Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/32777.

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Morrison, Kirk Murray. "An assessment of the potential for biological phosphorus removal in Canadian wastewater treatment plants". Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28507.

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This thesis assesses the potential for enhanced biological phosphorus (Bio-P) removal in Canadian wastewater treatment plants. Retrofit designs incorporating Bio-P removal were prepared for nine wastewater treatment plants across Canada, and were compared against chemical phosphorus removal technologies. Incremental capital and operating costs were calculated and internal rates of return (IRR's) for the capital investment required to install the Bio-P removal facilities were calculated. Based on these results, an assessment of the potential use for the technology in Canada is made. Of the nine plants studied, results indicate that Bio-P removal is economically superior to chemical phosphorus removal for the Calgary Bonnybrook, Edmonton Gold Bar, Saskatoon Mclvor Weir and Regina wastewater treatment plants. In general, Bio-P removal appears to offer significant economic advantages to plants located in Alberta and Saskatchewan because of the high cost of phosphorus removal chemicals in these provinces. The present low cost of phosphorus removal chemicals in Ontario and Quebec likely limits the viability of Bio-P removal to large (greater than 300,000 m³/d), suitably configured plants. In British Columbia, where Bio-P removal is presently used in the Okanagan Valley, the absence of widespread provincial phosphorus removal standards makes future Bio-P installations unlikely. The potential for Bio-P removal in Manitoba, the Maritimes and the Yukon and Northwest Territories is again limited by the absence of phosphorus removal standards in these parts of Canada. Results also indicate that the use of an anoxic/anaerobic/ aerobic process in the bioreactor, in conjunction with primary sludge fermentation through gravity thickening, is very applicable to Canadian plants and offers potential capital and operating cost savings relative to other Bio-P processes. The common practice of anaerobic sludge digestion, combined with sludge dewatering and land application, was found to be unfavourable from a Bio-P perspective unless the resulting supernatant/filtrate streams can be re-used or disposed of outside of the mainstream treatment process. Through the preparation of the retrofit designs, it was determined that certain aspects of Bio-P technology require additional research in order to optimize treatment plant design. These include kinetic modelling; short SRT Bio-P removal; the anorexic/anaerobic/aerobic process; the use of gravity thickening for primary sludge fermentation; and phosphorus release during anaerobic digestion.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate

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Chen, Wen, i 陳雯. "A membrane bioreactor(MBR) for an innovative biological nitrogen removal process". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39557959.

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Zhao, Kang, i 趙鈧. "An iron-facilitated chemical and biological process for phosphorus removal and recovery during wastewater treatment". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/196027.

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Phosphorus (P) is an important pollutant of concern in wastewater that causes eutrophication and algal blooms in water body. On the other hand, P is a valuable natural resource for agricultural and industrial use. With the rapid depletion of mineral phosphorus on earth, there is a need to recover phosphorus from wastewater. In this study, a new chemical and biological process facilitated with iron dosing has been developed for P removal and recovery during wastewater treatment. The system consists of a main stream identical to the conventional activated sludge process in an aerobic sequencing batch reactor (SBR) for P removal and a side stream of sludge recirculation through an anaerobic SBR (AnSBR) for P release and recovery from the P-rich sludge. In the aerobic SBR treating a synthetic domestic wastewater, Fe(III) (FeCl3) was dosed to remove P by precipitation and adsorption. Fe(III) dosing at a Fe/P molar ratio of 1.5:1 could reduce the P concentration from more than 10 mg/L to below 1 mg/L in the final effluent. Compared to other dosing periods, dosing Fe(III) right before the SBR settling could achieve the best result in sludge flocculation and P removal. Meanwhile, organic removal was well maintained as 90% of the chemical oxygen demand (COD) was degraded in the aerobic SBR. In the AnSBR, phosphate precipitated with ferric iron in the sludge was released owing to microbial Fe(III) reduction, and a positive correlation was found between the phosphate and ferrous iron concentrations in the sludge suspension. Chemical tests showed that significant P release from Fe(III)-P occurred only if the acidic condition and the reducing condition were combined. For the AnSBR sludge, a higher organic loading, lower pH and higher biomass concentration resulted in a higher level of Fe(III) reduction and P release. Organic acidogenesis prevailed in the reactor and lowered the pH to ~4.5, which facilitated the P release from the solid phase into the liquid phase. With a solids retention time (SRT) of 10 days, the anaerobic supernatant contained a phosphate concentration of up to 70 mg/L, while the settled sludge was returned to the aerobic SBR. The phosphate could be readily recovered from the supernatant with Fe-induced precipitation by aeration and pH adjustment, and the overall P recovery could be achieved at about 70%. In addition to the treatment performance, the speciation of P in the aerobic sludge and the anaerobic sludge also was investigated. A significant change in the immediately available P and the redox-sensitive P was found in the sludge through the aerobic-anaerobic cycle. Such chemical transformation is believed to be crucial to the P removal and recovery during the wastewater treatment process.
published_or_final_version
Civil Engineering
Master
Master of Philosophy

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Mao, Yanping, i 毛艷萍. "Biological removal of phosphorus and nitrogen from wastewater : new insights from metagenomic and metatranscriptomic approaches". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206323.

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Stephenson, Robert John. "A comparison of retained biomass anaerobic digester designs". Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26740.

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The principles behind anaerobic digestion are fairly well understood, but the limits of application of each digester design are not known. Because there are significant differences in the properties of the many wastewaters requiring treatment optimal anaerobic digester performance requires the matching of feed characteristics to a digester design and mode of operation. No consensus has yet emerged on digester design, operating conditions or feed/digester match-ups. In this study, three bench scale retained biomass anaerobic digester designs were examined for their response to a sequence of varied hydraulic retention times (HRTs) and influent wastewater concentrations. The digester designs studied were the upflow anaerobic filter, the upflow anaerobic expanded bed and the upflow anaerobic sludge bed. The wastewater was screened and diluted dairy cow manure obtained from the UBC dairy barn. The parameters monitored included the total and soluble chemical oxygen demand (TCOD and SCOD), volatile and suspended solids (VS and SS), total volatile fatty acids (VFAs), total Kjeldahl and ammonia nitrogen (TKN and NH₃-N), pH, biogas production, and the methane (CH₄) and carbon dioxide (C0₂) content of the biogas. Wastewater treatment efficiencies, measured in terms of TCOD, SCOD, VS, and TVFA removals, and methane productivity and methane yield for each of the digester designs were examined for the range of the operating conditions. The anaerobic filter digester effected a mean TCOD removal efficiency of 47% ± 14% at a mean 4.0 day HRT, 51% ± 9% at a mean 2.3 day HRT and 35% ± 11% at a mean 1.3 day HRT. The expanded bed digester effected a mean TCOD removal of 45% ± 15% at a mean 4.3 day HRT, 38% ± 12% at a mean 2.5 day HRT and 28% ± 9% at a mean 1.3 day HRT. The sludge bed digester effected a mean TCOD removal of 53% ± 9% at a mean 3.8 day HRT, 45% ± 12% at a mean 2.2 day HRT and 32% ± 10% at a mean 1.2 day HRT. For all three digesters, the difference in the treatment efficiency over the range of HRTs tested, from 5 to 1.25 days was not in proportion to the change in HRT. Methane productivity, measured against either the removal or addition of substrate in terms of TCOD, SCOD, VS and TVFA, demonstrated considerable variability. Methane production increased with both substrate addition and substrate removal. Methane yield increased with increasing HRT. The sludge bed digester generally exhibited the greatest but most variable methane yields. It produced 0.095 L CH₄/g VS added at a mean 3.8 day HRT and 0.037 L CH₄/g VS added at a mean 1.2 day HRT. The anaerobic filter delivered the greatest methane yield at the intermediate HRT, 0.044 L CH₄/g VS added at a mean 2.3 day HRT. The expanded bed demonstrated low methane yields over the range of feed strengths and HRTs tested. Biogas composition averaged 62.1% methane and 17.1% carbon dioxide for the anaerobic filter, 43.6% methane and 5.3% carbon dioxide for the expanded bed. and 61.1% methane and 18.9% carbon dioxide for the sludge bed.
Applied Science, Faculty of
Graduate

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Yang, Ying, i 楊穎. "Characterization of broad-spectrum antibiotic resistance genes in wastewater treatment reactors through metagenomic approaches". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206338.

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Fradler, Katrin. "Improving bio-electricity production and waste stabilization in Microbial Fuel Cells". Thesis, University of South Wales, 2015. https://pure.southwales.ac.uk/en/studentthesis/improving-bioelectricity-production-and-waste-stabilization-in-microbial-fuel-cells(91c2db18-126b-4610-9bdb-42d7e42ae5e9).html.

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Biological wastewater treatment is typically aerobic and an energy intensive process, mainly due to the required aeration. Alternative sustainable processes are sought, such as Microbial fuel cells (MFC) where electrogenic bacteria can degrade organic matter present in the waste stream while simultaneously generating electricity. MFCs represent an emerging technology which may deliver the capability to reduce the pollution potential of low strength wastewaters (< 1500 mg COD l-1) while generating electricity which could be used to self-power the process. Waste streams high in volatile fatty acids (VFAs) with high conductivity are particularly preferred substrate streams. These may include the effluent from two stage bio-hydrogen and bio-methane systems, which in this study were treated in a four-module tubular MFC (V=1 l) to reduce the chemical oxygen demand (COD) and recover further energy from the substrate. It was shown that the power increased with increasing organic loading rate (0.036-0.572 g sCOD l-1 d-1), but COD removal efficiency decreased. The Coulombic Efficiency (CE) was found to decrease significantly at OLR ˃ 0.6 g sCOD l-1 d-1 and the energy recovery was 92.95 J l-1 (OLR=0.572 g sCOD l-1 d-1). Also, wash-down waters from a chilled food producing company were treated in the same tubular MFC, reducing the soluble COD content by 84.8%. The low power (≈ 30 W m-3) and cell potential (≈ 0.5 V) makes it necessary to investigate methods such as external capacitors, DC/DC converters or serial and parallel connection to improve the power quality. In this thesis, the use of the intrinsic capacitance was tested by switched mode, open and closed circuit (OC/CC) operation of a 2-module tubular MFC with high surface area carbon veil anode. The charge accumulated during OC and released when switched to CC was dependent on the external resistor (R = 100-3 kΩ) and duty cycle. Short period OC/CC switching further increased potential due to the pseudo-capacitance of the reactor, but only at the expense of energy efficiency, compared to continuous operation (CC) under constant load. Another approach to enhance the practical implementation of MFCs is integration with other processes such as reverse electrodialysis to increase MFC’s cell potential or e.g. desalination. In this study a MFC was integrated with supported liquid membrane technology (SLM) for the first time, for the removal of metal ions of wastewater. A three chamber reactor, with a common cathode/feed phase containing 400 mg Zn2+ l-1, enabled V the simultaneous treatment of organic- and heavy metal containing wastewaters. The MFC/SLM combination produces a synergistic effect which enhances the power performance of the MFC significantly; 0.233 mW compared to 0.094 mW in the control. It is shown that the 165±7 mV difference between the MFC/SLM system and the MFC control is partially attributable to the lower cathode pH in the integrated system experiment, the consequent lower activation overpotential and higher oxygen reduction potential. The system demonstrates that within 72 h, 93±4% of the zinc ions are removed from the feed phase. A further study, with continuously operated cathode/feed chamber (100 mg Zn2+ l-1), showed that an enhanced effect on increasing cell potential was possible and could also be maintained in continuous operation.

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Casher, Thomas Christopher. "Biological excess phosphorus removal under high rate operating conditions in a suspended growth treatment process". Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29464.

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The primary objective of this research was to determine if efficient biological phosphorus removal could be established under low sludge retention time of 2 days and a nominal hydraulic retention time of 4 to 6 hours. The two-stage Phoredox process was selected because of the practical application of retrofitting high rate treatment plants to achieve bio-P removal without the additional tankage required for an anoxic section and the additional expense of a recycle system. It has been shown that nitrate recycled into the anaerobic reactor impacts on bio-P removal and the two-stage Phoredox process provides no control over nitrates entering the anaerobic reactor. Therefore a secondary objective of this research was to determine if a low sludge retention time mode of operation could be used as an effective way to prevent nitrification in the activated sludge treatment process. Another objective was to observe mixed liquor settling characteristics of the two-stage Phoredox process operated under high rate conditions. A pilot scale two-stage Phoredox activated sludge treatment process operating under high rate conditions was used to meet these objectives. The desired bio-P removal biomass was not observed under SRT operating conditions of 2, 3 and 5 days. Partway into the research a sludge bulking condition developed which was identified as filamentous growth. On two occasions this severe filamentous growth resulted in the process failing and the system being restarted. On one occasion after the system was restarted using a seed sludge from a three-stage Phoredox pilot plant, a bio-P removal biomass was present. This condition only lasted for a short period and ended as filamentous growth began to become dominant. The process failed because of this phenomenon. The system was restarted using a seed sludge and again filamentous growth dominated. Chlorine addition was found to be the only method to control this phenomenon and was continued to the end of the research. The desired bio-P removal biomass was not observed even during the last period of the research when the SRT was increased to 8 days. During this research a stable bio-P removal biomass was not established. For a short period a bio-P removal biomass was present but failed to persist. Nitrification never became established at any time. Sludge settleability was poor due to filamentous growth which developed partway into the research and was present throughout the remainder of the study. Chlorine addition was the only method found that remedied this settling problem.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate

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Książki na temat "Sewage – Purification – Biological treatment"

T, Daigger Glen, i Lim Henry C. 1935-, red. Biological wastewater treatment. Wyd. 2. New York: Marcel Dekker, 1999.

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Biowaste and biological waste treatment. London: James & James, 2001.

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Biological wastewater treatment systems: Theory and operation. Chichester: Wiley, 1990.

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Wolicka, Dorota. Sulphate-reducing bacteria in biological treatment wastewaters. Hauppauge, N.Y: Nova Science Publishers, 2009.

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Winkler, M. A. Biological treatment of waste-water. Chichester: Horwood, 1997.

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Winkler, M. A. Biological treatment of waste-water. Chichester: Ellis Horwood, 1998.

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C, Reed Sherwood, i Middlebrooks E. Joe, red. Natural wastewater treatment systems. Boca Raton, FL: CRC/Taylor & Francis, 2006.

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Biological treatment of solid waste: Enhancing sustainability. Toronto: Apple Academic Press, 2015.

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Scott, Wallace, red. Treatment wetlands. Wyd. 2. Boca Raton, FL: CRC Press, 2009.

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Kadlec, Robert H. Treatment Wetlands. London: Taylor and Francis, 2008.

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Części książek na temat "Sewage – Purification – Biological treatment"

Bhadrecha, Pooja, Shilpy Singh, Indu Kumari i Deepika Bhatia. "Biological and Thermo-chemical Treatment Technologies for Sustainable Sludge Management". W Sustainable Management and Utilization of Sewage Sludge, 97–123. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-85226-9_5.

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Riaz, Sobia, Zia Ur Rahman Farooqi, Predrag Ilic, Muhmmad Saad Bin Zafar, Hanan Ahmad, Moaz Khursheed, Noman Gulzar, Mohsin Raza i Rizwan Mehmood. "Biological and Thermo-chemical Treatment Technologies for Sustainable Sludge Management". W Sustainable Management and Utilization of Sewage Sludge, 403–25. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-85226-9_19.

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Barbour, E. K., N. H. Nabbut i H. M. Al-Nakhli. "Reduction of Bacterial Contamination in Sewage Effluents and Soils of Saudi Arabia: Impact of Sewage Treatment Technology and Natural Self-Purification". W Perspectives in Biotechnology and Applied Microbiology, 241–50. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4321-6_18.

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Dobele, Galina, Nicolay Bogdanovich, Galina Telysheva i Uldis Viesturs. "Application of Sorbent Obtained by Pyrolysis of Sewage Sludge for Biological Treatment of Waste Water". W Seventeenth Symposium on Biotechnology for Fuels and Chemicals, 857–67. Totowa, NJ: Humana Press, 1996. http://dx.doi.org/10.1007/978-1-4612-0223-3_80.

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Bhunia, P. "Fundamentals of Biological Treatment". W Comprehensive Water Quality and Purification, 47–73. Elsevier, 2014. http://dx.doi.org/10.1016/b978-0-12-382182-9.00048-7.

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Gray, N. F. "Biological Aspects of Secondary Sewage Treatment". W Water Technology, 460–87. Elsevier, 2010. http://dx.doi.org/10.1016/b978-1-85617-705-4.00015-0.

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Gray, N. F. "Biological Aspects of Secondary Sewage Treatment". W Water Technology, 399–422. Elsevier, 2005. http://dx.doi.org/10.1016/b978-075066633-6/50016-x.

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". Biological Aspects of Secondary Sewage Treatment". W Water Technology, 474–501. CRC Press, 2017. http://dx.doi.org/10.1201/9781315276106-24.

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Gwebu, Lubelihle, i Canisius Mpala. "Application of Vermifiltration for Domestic Sewage Treatment". W Wastewater Treatment [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.103920.

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Climate change has led to water shortages in semi-arid regions. SDG 13 was advocates for wastewater reuse. Zimbabwe uses centralised conventional sewage treatment systems. Vermifiltration combines filtration process and earthworms in sewage water treatment. Vermifiltration is efficient, viable, requires less expertise and can be decentralised. Vermifiltration technique was used in treating domestic septic tank sewage water. Design parameters and efficiency were determined and characterised Vermifiltered water parameters were compared against the Environmental Management Agency Statutory Instrument 6 irrigation water standards. Vermifilter media contained gravel and composted soil with 20g Eseinia fetida earthworms per litre of soil. Treatments were septic tank raw water, vermifilter and control biofilter. A duplicate analysis was conducted. Hydraulic retention time was 1 hour 40 minutes and hydraulic loading rate 163l/m2/hour. Disposed wastewater did not meet required EMA standards. Both filters were effective in treating domestic sewage. There was a significant difference between untreated and treated wastewater. Vermifilter and the control, significantly (p < 0.01) treated pH, turbidity, total dissolved solids total suspended solids, biological oxygen demand, nitrates, phosphates and total coliforms properties. Vermifiltered water met EMA standards for irrigation and non-potable water uses. Phytoremediation can be incorporated in the designs to increase efficiency.

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Rastogi, Rupali. "Water Purification Using Different Chemical Treatment". W Advances in Environmental Engineering and Green Technologies, 338–67. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-6111-8.ch019.

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Water from surface sources is often contaminated by microbes, whereas groundwater is normally safer, but even groundwater can be contaminated by harmful chemicals from human activities or from the natural environment. The purification process of water may reduce the concentration of particulate matter including suspended particles, parasites, bacteria, algae, viruses, fungi, and a range of dissolved and particulate material derived from the surfaces. Water purification is the process of removing undesirable chemicals, materials, and biological contaminants from contaminated water. Most water is purified for human consumption (drinking water), but water purification may also be designed for a variety of other purposes, such as medical, pharmacology, chemical, and industrial applications. In general, the methods used include physical processes such as filtration and sedimentation, biological processes such as slow sand filters or activated sludge, chemical processes such as flocculation and chlorination, and the use of electromagnetic radiation such as ultraviolet light.

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Streszczenia konferencji na temat "Sewage – Purification – Biological treatment"

Yu, Feng, Hongqi Zhu i Yanjun Yin. "The Biological Purification Project Practice of the Sewage Treatment Station’s Odor". W 2015 Asia-Pacific Energy Equipment Engineering Research Conference. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/ap3er-15.2015.87.

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Wenquan Dai, Maoan Du, Zhongyi An i Huichao Zhang. "Anoxic/aerobic biological aerated filter for treatment of domestic sewage". W 2011 Second International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2011. http://dx.doi.org/10.1109/mace.2011.5987598.

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Ruhua, Zhang, Yin Niansheng, Wei Yuqing, Xu Dongliang i Song Jiahao. "Automatic control of sewage treatment process using biological reaction (iSPEC 2021)". W 2021 IEEE Sustainable Power and Energy Conference (iSPEC). IEEE, 2021. http://dx.doi.org/10.1109/ispec53008.2021.9735824.

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Yoshida, Masaho, Masakatsu Miyajima i Atsunori Numata. "Application of Liquefaction Countermeasure Technique by Log Piling for Water Purification and Sewage Treatment Plant". W Sixth China-Japan-US Trilateral Symposium on Lifeline Earthquake Engineering. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784413234.020.

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Chirikanova, Yu S. "MODELING OF WASTEWATER TREATMENT". W Всероссийская научная конференция, посвященная памяти доктора технических наук, профессора Александра Дмитриевича Потапова. Федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский Московский государственный строительный университет" (НИУ МГСУ), 2021. http://dx.doi.org/10.22227/978-5-7264-2875-8.2021.159-162.

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The paper deals with the problem of mathematical modeling of biological wastewater treatment. The peculiarity of the biological treatment system is that a block with activated sludge, called an aeration tank, is used for water purification. To describe the process of biological wastewater treatment in aeration tanksa mathematical model developed in the GPS-X software package is proposed.

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Piaskowski, K., i R. Świderska-Dąbrowska. "Application of iron sludge from water purification plant for pretreatment of reject water from sewage sludge treatment". W The Fifth National Congress of Environmental Engineering. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315281971-19.

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Shi, Dongwen, Jianbo Chen, Zhanjun Zhang, Yangjun Gao, Longhai Li i Danli Xi. "The Computer Control Experiment System for Biological Sewage Treatment Teaching Based on xPC-target". W 2006 Chinese Control Conference. IEEE, 2006. http://dx.doi.org/10.1109/chicc.2006.280722.

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Jing, Zhaoqian, Zheng Wang, Xiwu Lu i Xianning Li. "Performance of Biological-Ecological Process for Rural Domestic Sewage Treatment in Taihu Lake Region". W 2009 International Conference on Environmental Science and Information Application Technology, ESIAT. IEEE, 2009. http://dx.doi.org/10.1109/esiat.2009.129.

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Gliniak, Maciej, Tomasz Drozdz, Piotr Nawara, Anna Lis i Maria Szczuka. "The Effect of Static Magnetic Field on Chemical Properties of Sewage Sludge During Biological Treatment". W 2018 Progress in Applied Electrical Engineering (PAEE). IEEE, 2018. http://dx.doi.org/10.1109/paee.2018.8441041.

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Guo, Gaimei, i Huifen Qin. "Effect of Mineral Oil on Treatment of Sewage from Channel Discharge with Biological Accelerator-Biofilm Process". W 2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM). IEEE, 2011. http://dx.doi.org/10.1109/cdciem.2011.472.

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