Rozprawy doktorskie na temat „Sewage – Purification – Nitrogen removal”
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Sprawdź 50 najlepszych rozpraw doktorskich naukowych na temat „Sewage – Purification – Nitrogen removal”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Przeglądaj rozprawy doktorskie z różnych dziedzin i twórz odpowiednie bibliografie.
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.
Pełny tekst źródłaYan, Qingmei, i 嚴慶梅. "Biological nitrogen removal of saline wastewater by ammoniumoxidizers". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42182116.
Pełny tekst źródłaChen, 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.
Pełny tekst źródła楊龍元 i Lung-yuen Christopher Yeong. "Removal of wastewater cod and nitrogen using fibrous packing media". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1991. http://hub.hku.hk/bib/B31210636.
Pełny tekst źródłaCao, Keping. "Simultaneous Removal of Carbon and Nitrogen by Using a Single Bioreactor for Land Limited Application". Thesis, Water Resources Research Center, University of Hawaii at Manoa, 1998. http://hdl.handle.net/10125/22230.
Pełny tekst źródłaClayton, John Andrew. "Denitrification kinetics in biological nitrogen and phosphorus removal activated sludge systems". Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/21139.
Pełny tekst źródła黃金華 i Kam-wah Wong. "Deritrification in the activated sludge process with controlled anoxicconditions in the aeration tank". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1987. http://hub.hku.hk/bib/B31208423.
Pełny tekst źródłaHijazi, Amal. "Nitrogen and phosphorus transformations in fixed-film biofilters subjected to aeration/no-aeration cycles". Thesis, Queensland University of Technology, 1998. https://eprints.qut.edu.au/36070/6/36070_Digitised_Thesis.pdf.
Pełny tekst źródłaGuo, Lei. "Optimization of BNR from wastewater using SBR and A²O processes". Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2493027.
Pełny tekst źródłaHanson, Carter Curtis. "Temporal effect on nitrogen removal in a subsurface flow constructed wetland". Virtual Press, 1996. http://liblink.bsu.edu/uhtbin/catkey/1027117.
Pełny tekst źródłaDepartment of Natural Resources and Environmental Management
朱潔嫻 i Kit-han Kristin Chu. "Biotreatment of waste water by Pistia stratiotes L. and its application in agriculture". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31214058.
Pełny tekst źródłaSchultz, Paul Eaton. "Nitrogen removal and biomass production from a harvested and unharvested scirpus wetland". Virtual Press, 1997. http://liblink.bsu.edu/uhtbin/catkey/1048389.
Pełny tekst źródłaDepartment of Natural Resources and Environmental Management
Degen, Marcia J. "Denitrification in low pressure distribution onsite wastewater disposal systems". Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/29272.
Pełny tekst źródłaZhang, Zhenhua. "Plant growth and nutrient removal in simulated secondary-treated municipal wastewater in wetland microcosmos". University of Western Australia. School of Earth and Geographical Sciences, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0141.
Pełny tekst źródłaKasmuri, Norhafezah. "The removal of ammonia-nitrogen and degradation of 17α-ethynylestradiol and mestranol using partial fixed bed continuous reactor (PFBR) and moving bed continuous reactor (MBBR)". Thesis, Swansea University, 2014. https://cronfa.swan.ac.uk/Record/cronfa42223.
Pełny tekst źródłaMcMillan, Morgan. "Biological treatment of source separated urine in a sequencing batch reactor". Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96047.
Pełny tekst źródłaENGLISH ABSTRACT: Urine contains up to 80% of nitrogen, 50 % of phosphates and 90 % of potassium of the total load in domestic wastewater but makes up less than 1% of the total volume (Larsen et al., 1996). The source separation and separate treatment of this concentrated waste stream can have various downstream advantages on wastewater infrastructure and treated effluent quality. The handling of undiluted source separated urine however poses various challenges from the origin onward. The urine has to be transported to a point of discharge and ultimately has to be treated in order to remove the high loads of organics and nutrients. Wilsenach (2006) proposed onsite treatment of source separated urine in a sequencing batch reactor before discharging it into the sewer system. This study focused on the treatment of urine in a sequencing batch reactor (SBR) primarily for removal of nitrogen through biological nitrification-denitrification. The aim of the study was to determine nitrification and denitrification kinetics of undiluted urine as well as quantification of the stoichiometric reactions. A further objective was to develop a mathematical model for nitrification and denitrification of urine using experimental data from the SBR. The SBR was operated in 24 hour cycles consisting of an anoxic denitrification phase and an aerobic nitrification phase. The sludge age and hydraulic retention time was maintained at 20 days. pH was controlled through influent urine during volume exchanges. Undiluted urine for the study was obtained from a source separation system at an office at the CSIR campus in Stellenbosch. Conditions in the reactor were monitored by online temperature, pH and ORP probes. The OUR of the system was also measured online. One of the main challenges in the biological treatment of undiluted urine was the inhibiting effect thereof on nitrification rate. The anoxic mass fraction was therefore limited to 17 % in order to allow longer aerobic phases and compensate for the slow nitrification rates. Volume exchanges were also limited to 5% of the reactor volume in order to maintain pH within optimal range. Samples from the reactor were analysed for TKN, FSA-N, nitrite-N, nitrate-N and COD. From the analytical results it was concluded that ammonia oxidising organisms and nitrite oxidising organism were inhibited as significant concentrations of ammonia-N and nitrite-N were present in the effluent. It was also concluded that nitrite oxidising organisms were more severely inhibited than ammonia oxidising organisms as nitrate-N was present in very low concentrations in the effluent and in some instances not present at all. Ultimately the experimental system was capable of converting 66% of FSA-N to nitrite- N/nitrate-N of which 44% was converted to nitrogen gas. On average 48% of COD was removed. A mathematical model was developed in spreadsheet form using a time step integration method. The model was calibrated with measured online data from the SBR and evaluated by comparing the output with analytical results. Biomass in the model was devised into three groups, namely heterotrophic organisms, autotrophic ammonia oxidisers (AAO) and autotrophic nitrite oxidisers (ANO). It was found that biomass fractionation into these three groups of 40% heterotrophs, 30% AAO and 30% ANO produced best results. The model was capable of reproducing the general trends of changes in substrate for the various organism groups as well as OUR. The accuracy of the results however varies and nearexact results were not always achievable. The model has some imperfections and limitations but provides a basis for future work.
Tugtas, Adile Evren. "Effect of Nitrate Reduction on the Methanogenic Fermentation: Process Interactions and Modeling". Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-01122007-155216/.
Pełny tekst źródłaSotira Yiacoumi, Committee Member ; Patricia Sobecky, Committee Member ; Ching-Hua Huang, Committee Member ; Dr. Spyros Pavlostathis, Committee Chair ; Frank Loeffler, Committee Member.
Ferro, Thayse Nathalie. "Remoção de matéria carbonácea, nitrogenada e fosfatada em um sistema anaeróbio-aeróbio-anóxico (AOA) submetido a variações de cargas orgânicas e hidráulicas". Universidade Tecnológica Federal do Paraná, 2018. http://repositorio.utfpr.edu.br/jspui/handle/1/3117.
Pełny tekst źródłaNo Brasil, as estações de tratamento de esgoto têm suas configurações baseadas em processos anaeróbios seguidos ou não de pós tratamento, normalmente aeróbio. Estas configurações apresentam limitações como baixa eficiência de remoção de nutrientes. Assim, ao considerar aspectos técnicos, pretende-se avaliar a eficiência de remoção da matéria carbonácea, nitrogenada e fosfatada, em sistema de tratamento combinado anaeróbio (22,1 L), aeróbio (19,9 L) e anóxico (17,4 L) (AOA), tratando esgoto sintético. Anéis corrugados de Policloreto de Polivinila (PVC) foram utilizados como material suporte para fixação da biomassa. O comportamento do sistema foi avaliado em quatro etapas distintas, nas quais foram analisadas a influência da adição de carbono no reator anóxico e da redução do Tempo de Detenção Hidráulica (θh) nos reatores anaeróbios e aeróbios. O desempenho do sistema foi estudado por meio de perfis de amostragem temporal com determinação dos parâmetros físicoquímicos temperatura do líquido (TL), pH, alcalinidade total (AT), alcalinidade a bicarbonato (AB), ácidos voláteis (AV), oxigênio dissolvido (OD), potencial de oxirredução (REDOX), turbidez (UNT), demanda química de oxigênio (DQO) nitrogênio total kjeldahl (NTK), nitrogênio amoniacal (N-NH4 + ), nitrito (N-NO2 - ), nitrato (N-NO3 - ) e fósforo total (P-PO4 -3 ), em amostras do afluente e efluente de cada reator coletadas em intervalos de 3 h durante 24 h. Na Etapa 1 foram obtidas eficiências de remoção de matéria carbonácea, nitrogenada e fosfatada de 97%, 57% e 50%, respectivamente, para o sistema operado com θh de 8 h para o reator anaeróbio, 7,3 h para o reator aeróbio e 6,4 h para o reator anóxico. Na Etapa 2 com adição de 20% da vazão afluente de esgoto bruto (fonte de carbono) e manutenção dos valores de θh, as eficiências de remoção de carbono e nitrogênio total foram de 95% e 55%, não sendo reportada eficiência de remoção de fósforo. Na Etapa 3 com a retirada da fonte de carbono e redução do θh nos reatores anaeróbio e aeróbio para 4 h, foram obtidas eficiências de remoção de 96% de matéria carbonácea, 51% de nitrogênio total e 40% de fósforo. Na Etapa 4 com manutenção do θh de 4 h para o reator anaeróbio, 7,3 h para o reator aeróbio e 6,4 h para o reator anóxico, as eficiências de remoção resultaram em 97% de matéria carbonácea, 43% de nitrogênio total e 41% de fósforo. Com o estudo cinético foi possível verificar que a redução da relação C/N influenciou positivamente o desempenho dos microrganismos nitrificantes e desnitrificantes. Por fim, conclui-se que o sistema AOA apresentou eficiência de remoção de matéria carbonácea superior ao limite exigido na legislação e proporcionou remoção simultânea de nitrogênio e fósforo.
In Brazil, sewage treatment plants have their configurations based on anaerobic processes followed or not by post-treatment, usually aerobic. These configurations have limitations such as low nutrient removal efficiency. Thus, when considering technical aspects, it was intended to evaluate the efficiency of removal of carbonaceous, nitrogenous and phosphate in an anaerobic (22.1 L), aerobic (19.9 L) and anoxic (17.4 L) (AOA) treating synthetic wastewater. Polyvinyl chloride corrugated rings (PVC) were used as support material for biomass fixation. The behavior of the system was evaluated in four different stages in order to analyze the influence of the addition of carbon in the anoxic reactor and the reduction of Hydraulic Retention Times (θh) in the anaerobic and aerobic reactors. The performance of the system was studied by means of temporal sampling profiles with determination of the physicchemical parameters temperature, pH, alkalinity total (AT) and bicarbonate (AB), volatile acids (VA), dissolved oxygen (OD), oxidation potential (REDOX), turbidity (UNT), chemical oxygen demand (COD), total nitrogen kjeldahl (NTK), ammoniac nitrogen (N-NH4 + ), nitrite (N-NO2 - ), nitrate (N-NO3 - ), and total phosphorus (P-PO4 -3 ) in samples of the influent and effluent from each reactor collected at intervals of 3 h for 24 h. In Stage 1, the removal efficiency of 97%, 57% and 50% of carbonaceous, nitrogenous and phosphate matter was obtained for the system operated with θh of 8 h for the anaerobic reactor, 7.3 h for the aerobic reactor and 6.4 h for the anoxic reactor. In Stage 2 with the addition of 20% of the raw sewage inflow (carbon source) and maintenance of the θh values, the carbon and total nitrogen removal efficiencies were 95% and 55%, with no reported removal efficiency phosphor. In Stage 3, with the removal of the carbon source and reduction of the θh in the anaerobic and aerobic reactors for 4 h, removal efficiencies of 96% of carbonaceous matter, 51% of total nitrogen and 40% of phosphorus were obtained. In Stage 4 with the maintenance of the θh of 4 h for the anaerobic reactor, 7.3 h for the aerobic reactor and 6.4 h for the anoxic reactor, the removal efficiencies resulted in 97% of carbonaceous matter, 43% of total nitrogen and 41% phosphorus. With the kinetic study, it was possible to verify that the reduction of the C/N positively influenced the performance of the nitrifying and denitrifying microorganisms. Finally, it can be concluded that the AOA system presented removal efficiency of carbonaceous matter higher than the limit required by the legislation and provided simultaneous removal of nitrogen and phosphorus.
Vargas, Lara Jose Maria. "Identificação de modelos para controle preditivo : aplicação a uma planta de lodos ativados". [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260341.
Pełny tekst źródłaTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
Made available in DSpace on 2018-08-04T02:32:56Z (GMT). No. of bitstreams: 1 VargasLara_JoseMaria_D.pdf: 1539805 bytes, checksum: cb3f1db3ea06ddceb5dac7d0f33c587c (MD5) Previous issue date: 2005
Resumo: Este trabalho trata da síntese de um controlador preditivo adaptativo, baseado em modelos reduzidos obtidos mediante identificação orientada para controle preditivo. A metodologia proposta envolve duas áreas importantes para o sucesso do experimento de identificação. Na primeira, projeto de sinais de excitação, é mostrado como sinais de excitação pseudo-aleatórios multi-níveis podem ser projetados para atender com eficácia requisitos que sinais de excitação relevantes para controle devem satisfazer. Na segunda, modelagem de preditores, é abordada a modelagem por identificação de preditores de horizonte estendido. O objetivo central da metodologia proposta é o controle da remoção de matéria nitrogenada de uma planta de tratamento de esgotos por lodos ativados com pré-desnitrificação. A metodologia é aplicada para controlar a concentração de amônia mediante o controle do set-point de oxigênio dissolvido. A metodologia também é aplicada para o controle da concentração de nitrato no reator desnitrificante. Os controladores são avaliados em um estudo de simulação, mostrando a eficácia da metodologia proposta para o controle das concentrações de amônia e nitrato
Abstract: This work deals with the synthesis of an adaptive predictive controller, based on reduced models obtained via identification oriented to predictive control. The methodology proposed involves two important areas for the success of the identification experiment. In the first one, excitation signal design, it is shown how pseudo-random multilevel signals can be designed to effectively satisfy the requirements that excitation signals relevant for control should satisfy. In the second, predictor modelling, the identification of long-range horizon predictors is approached. The main objective of the proposed methodology is the control of the nitrogen removal in an predenitrifying activated sludge wastewater treatment plant. This methodology is applied to control the ammonium concentration in the denitrifying reactor. The controllers are evaluated in a simulation study, showing the effectiveness of the proposed methodology to control ammonium and nitrate concentrations
Doutorado
Automação
Doutor em Engenharia Elétrica
Yan, Qingmei. "Biological nitrogen removal of saline wastewater by ammonium oxidizers". Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B42182116.
Pełny tekst źródłaYeong, Lung-yuen Christopher. "Removal of wastewater cod and nitrogen using fibrous packing media /". [Hong Kong : University of Hong Kong], 1991. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13193429.
Pełny tekst źródłaChen, Wen. "A membrane bioreactor(MBR) for an innovative biological nitrogen removal process". Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B39557959.
Pełny tekst źródłaCopp, John B. "COD balances in biological nutrient (nitrogen and phosphorus) removal activated sludge systems /". *McMaster only, 1998.
Znajdź pełny tekst źródłaSun, Feiyun, i 孙飞云. "A membrane bioreactor (MBR) for a biological nutrient removal system: treatment performance, membrane foulingmechanism and its mitigation strategy". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44903856.
Pełny tekst źródłaMorrison, 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.
Pełny tekst źródłaApplied Science, Faculty of
Civil Engineering, Department of
Graduate
Lindawati. "Operational strategies for optimal carbon, nitrogen and phosphorus removal using sequencing batch reactor /". View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?CENG%202004%20LINDAW.
Pełny tekst źródłaZhao, 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.
Pełny tekst źródłapublished_or_final_version
Civil Engineering
Master
Master of Philosophy
凌偉忠 i Wai-chung Jackson Ling. "Biological nutrient removal in sequencing batch reactors using fibrouspacking medium". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31213388.
Pełny tekst źródłaLee, N. P. (Nelson Paul). "The affect of anaerobic volume reduction on the University of Cape Town (UCT) biological phosphorus removal process". Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29631.
Pełny tekst źródłaApplied Science, Faculty of
Civil Engineering, Department of
Graduate
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.
Pełny tekst źródłaApplied Science, Faculty of
Civil Engineering, Department of
Graduate
Brannan, Kenneth P. "Substrate stabilization in the anaerobic stage of a biological phosphorus removal system". Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49992.
Pełny tekst źródłaZeng, Raymond Jianxiong. "The role of intracellular storage products in biological nutrient removal /". St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16445.pdf.
Pełny tekst źródłaShetty, Ameesha R. "Metal anion removal from wastewater using chitosan in a polymer enhanced diafiltration system". Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-050406-115241/.
Pełny tekst źródłaMann, Robert A., of Western Sydney Hawkesbury University i Faculty of Science and Technology. "Phosphorus removal by constructed wetlands : substratum adsorption". THESIS_FST_XXX_Mann_R.xml, 1996. http://handle.uws.edu.au:8081/1959.7/333.
Pełny tekst źródłaDoctor of Philosophy (PhD)(Environmental Science)
Rubidge, Gletwyn Robert. "Evaluation and optimization of selected methods of arsenic removal from industrial effluent". Thesis, Port Elizabeth Technikon, 2004. http://hdl.handle.net/10948/230.
Pełny tekst źródłaCronje, Martin. "Investigation of electrochemical combustion plant for rural water disinfection and industrial organic effluent removal". Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16292.
Pełny tekst źródłaENGLISH ABSTRACT: Recent years have seen the development of various treatment methods for the purification of industrial waste waters due to the increased demand for reduced pollutant effluents. Aqueous waste streams containing toxic organic compounds are of special interest, since conventional treatment methods such as biological waste treatment can not always be used. Other popular treatment methods are often ineffective. Catalytic oxidation of organic wastes has been investigated since the 1960s with varying degrees of success. A major problem associated with this method is the high temperatures and pressures required to improve the activation energies involved. Electrochemical oxidation has become a popular method in the literature of treating these wastes, since the applied voltage determines the activation energy, and therefore the process can often be performed at ambient conditions. This thesis investigates the capability of a unique reactor system in the treatment of these wastes. The reactor utilises proton-exchange membrane technology to eliminate the requirement of conductivity in treated waste streams; thus the membrane serves as a solid electrolyte. The reactor system has therefore been referred to as a solid-polymer-electrolyte reactor. Novel metal oxide anodes are responsible for the oxidation of the organic molecules. These metal oxide catalysts show promise in the treatment of a wide variety of organic wastes. A SnO2 catalyst doped with ZrO2 is used as anode in this study. Dopants are added to the catalyst to improve properties such as catalytic activity and conductivity. Kinetic data was obtained on a wide range of values for the chosen experimental parameters (current density and flow rate). Phenol, an organic molecule often referred to in the literature as model contaminant due to its resistance to oxidation,was also used as contaminant in this study. The use of the reactor system in the disinfection of water containing selected pathogens, were included in the experimental work. This kinetic data served in the development of a simple model of the process, and provided the basis for a full analysis regarding potential scale-up and economic feasibility. A requirement of the study was the accurate determination of the various oxidation breakdown products of phenol. This led to the refinement of an HPLC analytical method in order to quantitatively determine these products. The full analysis showed that the current reactor system would not be economically viable — mainly due to very long reactor lengths required for the complete removal of all organic material. Both mass transfer and charge transfer at the chosen experimental conditions influenced the electrochemical oxidation of phenol. High pressure drops, causing low flow rates in the reactor, accounted for this because of the narrow flow channels required in the reactor. Some catalyst deactivation was also suspected to affect the overall reaction, but the full extent of the deactivation was not investigated thoroughly. There is still room for improvement in the electrochemical oxidation of organic wastes. The design of the flow channels, a factor that was not investigated, can significantly improve efficiency. Another aspect that was not investigated was the catalyst type. The catalyst has been identified in the literature as the main contributing factor to the success of the oxidation reaction. A wide variety of metal oxide catalysts are currently being researched and may improve the kinetics of the process even further. Further improvement needs to be made on the membrane/electrode assembly to improve current density distribution. Every improvement of the process in terms of the reactor design and catalyst will impact on the economics of the process, thus making the process more competitive with current treatment technologies.
AFRIKAANSE OPSOMMING: In die afgelope paar dekades, is daar ’n wye verskeidenheid metodes ontwikkel wat gebruik kan word om industri¨ele afvoer strome te behandel. Hierdie ontwikkeling het plaasgevind as gevolg van die verhoogde eis aan skoner afvoerstrome. Wateragtige afvoerstrome wat organiese verbindings bevat, is van besonderse belang omdat hierdie tipe strome soms besonders moeilik kan wees om te behandel. Gebruiklike metodes is in die meeste gevalle ongeskik vir behandelings-doeleindes. Katalitiese oksidasie is sedert die 1960’s gebruik, maar hierdie prosesse benodig dikwels ho¨e drukke en temperature om suksesvol te wees. Elektrochemiese oksidasie het intussen ’n populˆere behandelingsmetode geword, aangesien die aktiveringsenergie vir die oksidasieproses hoofsaaklik afhanklik is van die aangewende potensiaal en dus kan die proses by atmosferiese toestande gebruik word. In hierdie tesis word die geskiktheid van ’n unieke reaktorstelsel vir water-suiwering ondersoek. Die reaktor gebruik ’n proton-uitruilings-membraan om die behoefte vir konduktiwiteit in die water uit te skakel. Die membraan dien dus as ’n tipe soliede elektroliet en as gevolg hiervan word na die reaktorstelsel verwys as ’n soliede-polimeer-elektroliet reaktor. Nuwe metaal-oksied anodes word in die reaktor gebruik aangesien hulle belowende resultate toon in die oksidasie van organiese verbindings. In die navorsing, is ’n SnO2 katalis wat klein hoeveelhede ZrO2 bevat gebruik. Oksiede soos ZrO2 word dikwels gebruik om die aktiwiteit en konduktiwiteit van hierdie kataliste te bevorder. Kinetiese data is oor ’n wye bereik van parameter waardes ingesamel. Die hoof parameters in die eksperimentele werk was stroom digtheid en vloeitempo. Fenol, ‘n komponent wat volgens die literatuur in hierdie tipe van werk gebruik word, isas die besoedelende komponent gekies. Die doeltreffendheid van die reaktor in die ontsmetting van water, wat met ’n verskeidenheid skadelike mikro-organismes besmet is, is ook getoets. ‘n Eenvoudinge model is opgestel m.b.v. die kinetiese data, waarna ’n volledige analise met betrekking tot grootskaalse bedryf en ekonomiese uitvoerbaarheid gedoen is. ‘n Vereiste van die studie was om die konsentrasie van die afbreek-produkte van die oksidasie akkuraat vas te stel. As gevolg hiervan is ‘n ho¨e-druk-vloeistofchromatografie analitiese metode verfyn. Die analise het getoon dat die reaktorstelsel nie ekonomies sou wees nie. Een van die hoofredes hiervoor is die onrealistiese reaktorlengtes wat benodig sou word. Resultate het getoon dat die reaksie deur beide massa-oordrag en lading-oordrag be¨ınvloed word. Ho¨e drukvalle in die reaktor wat gelei het tot lae vloeitempo’s was hiervoor verantwoordelik. Die deaktivering van die katalis be¨ınvloed waarskynlik die reaksie, maar die deaktiveringsverskynsel is nie ten volle ondersoek nie. Die reaktorstelsel kan verder verbeter word deur verskeie elemente van die reaktor te ondersoek. Die ontwerp van die vloeikanale in die reaktor is nie ondersoek nie en kan die werksverrigting van die reaktor verhoog. Uit die literatuur is gevind dat die tipe metaaloksied wat as katalis gebruik word, die reaksie direk be¨ınvloed. Dus kan navorsing wat tans op die kataliste gedoen word nuwe kataliste na vore bring wat meer doeltreffend sal wees. Laastens, is die huidige membraan/elektrode samestelling nog oneffektief en kan die reaktor-opstelling dus nog verbeter word. Elke verbetering wat op die bogenoemde faktore van die reaktor ontwerp verkry word, sal die ekomoniese uitvoerbaarheid van die proses be¨ınvloed. So, sal die proses al meer kompeterend met huidige behandelingsmetodes word.
Lau, Yip Hang. "Maximization of treatment capacity of a full-scale biological nitrogen removal plant through model simulation and full-scale stress test /". View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?EVNG%202005%20LAU.
Pełny tekst źródłaCaglia, Stefania. "Nitrogen Removal in the Pilot Plant ITEST (Increased Technology in Sewage Treatment)". Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171846.
Pełny tekst źródłaPokethitiyook, Prayad. "Nitrate utilization as the final electron acceptor in a biological phosphorus removal system". Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03122009-040836/.
Pełny tekst źródłaCameron, Kimberley A. "The efficiency and mechanisms for pollutant removal in biological wastewater treatment systems /". Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33724.
Pełny tekst źródłaPattarkine, Vikram Madhao. "The role of metals in enhanced biological phosphorus removal from wastewater". Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08082007-120247/.
Pełny tekst źródłaScott, Daniel. "Biological Nitrogen Removal in a Gravity Flow Biomass Concentrator Reactor". University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1298323356.
Pełny tekst źródłaMcClintock, Samuel Alan. "Effects of temperature and mean cell residence time on the performance of high-rate biological nutrient removal processes". Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-08252008-162825/.
Pełny tekst źródłaBeard, Kelly Marie. "Role of oxidants in the removal of iron and organics from Harwood's Mill Reservoir". Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/104292.
Pełny tekst źródłaLee, Samuel H. "The influence of nitrogen and sludge age change in reactor performance and biopolymer production in activated sludge". Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/91041.
Pełny tekst źródłaM.S.
Hughes, Leonie. "Multistage and multiple biomass approaches to efficient biological nitrogen removal using biofilm cultures". Thesis, Hughes, Leonie ORCID: 0000-0001-6496-988X (2008) Multistage and multiple biomass approaches to efficient biological nitrogen removal using biofilm cultures. PhD thesis, Murdoch University, 2008. https://researchrepository.murdoch.edu.au/id/eprint/674/.
Pełny tekst źródłaHughes, Leonie. "Multistage and multiple biomass approaches to efficient biological nitrogen removal using biofilm cultures". Hughes, Leonie (2008) Multistage and multiple biomass approaches to efficient biological nitrogen removal using biofilm cultures. PhD thesis, Murdoch University, 2008. http://researchrepository.murdoch.edu.au/674/.
Pełny tekst źródłaAshworth, Robert Frederick. "The factors determining nitrogen removal from sewage using a gravel bed hydroponic treatment system". Thesis, University of Portsmouth, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305673.
Pełny tekst źródłaHart, Vincent S. "An examination of biological phosphorus removal using bacterial counting and poly-β-hydroxybutyrate analysis in batch and continuous flow systems". Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/40652.
Pełny tekst źródłaMaster of Science
Abu-Ghararah, Ziad. "The effect of influent organic compounds on the performance of biological nutrient removal systems". Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/77907.
Pełny tekst źródłaPh. D.