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Dissertations / Theses on the topic 'Nitrification simultaneous'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Waltz, Kirk Hjelte. "Simultaneous Nitrification and Denitrification of Wastewater Using a Silicone Membrane Aerated Bioreactor." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/72.

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The purpose of this thesis is to investigate the use of a single reactor to biologically treat wastewater by simultaneously oxidizing ammonia, and reducing nitrate and nitrite. The Environmental Protection Agency (EPA) places strict discharge restrictions on these compounds due to their inherent toxicity to humans, wildlife, and ecosystems. The use of a simultaneous system can assist the conventional wastewater treatment technology that requires separate systems, by creating a system that needs less time and smaller size to reach effluent requirements. To conduct this research, a bench-scal

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2

Sager, Ann Elizabeth. "Experimental Studies of Simultaneous Nitrification Denitrification and Phosphorus Removal at Falkenburg Advanced Wastewater Treatment Plant." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6140.

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The discharge of point- and non-point source pollutants into surface waters resulting from industrial and/or municipal activities is a major focus of environmental regulation in the United States. As a result, the National Pollutant Discharge Elimination System (NPDES) permit program was established in 1972 in an effort to regulate discharges from industrial or municipal sources, including wastewater treatment plants (WWTP). To further protect Florida water quality, in 1978, State legislation enacted the Grizzle-Figg Act for Tampa Bay, which requires advanced wastewater treatment for any disch

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3

Aponte-Morales, Veronica Ester. "Ammonium Removal from High Strength Wastewater Using a Hybrid Ion Exchange Biological Process." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5901.

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Anaerobic digestion (AD) has been shown to be an effective technique for energy recovery and stabilization of livestock wastes, municipal sludges and industrial wastewaters. However, further treatment is required to remove nitrogen from AD effluents to avoid detriments to surface and ground waters. The high free ammonia (FA) concentrations present in AD effluents can inhibit nitrification processes in conventional biological nitrogen removal (BNR) systems. The overall goal of this research was to develop a process for removal of nitrogen from AD swine waste (ADSW) effluent. The proposed soluti

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4

Arakaki, Joelle. "Study of the Effect of BiOWiSH Aqua on Simultaneous Nitrification and Denitrification in a Membrane Aerated Bioreactor." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1893.

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This research entails the investigation of the effects of a bioaugmentation product from BiOWiSH® called Aqua, referred to as “Aqua” for the remainder of this paper, on the nitrogen removal rate in a membrane aerated bioreactor (MABR). This research was conducted using a MABR design that consisted of a silicone membrane and continuous flow airline with compressed air. The membrane system was designed to supply oxygen, creating an aerated layer at the membrane-biofilm interface and an anoxic layer at the biofilm-water interface. Laboratory experiments were conducted to compare the nitrogen remo

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5

Lo, Ing-Wei. "Nitrous oxide emission and nitrogen transformation dynamics in a hybrid simultaneous nitrification, denitrification and phosphorus removal system." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/5589.

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Nitrous oxide is a greenhouse gas with a global warming potential 310 times that of the contribution of CO₂. It is now recognized that the potential exists for N₂0 emission to be significant from some biological nutrient removal (BNR) processes. The control of N₂0 off-gas must therefore be considered when operating a BNR system. The main objectives of this research were to investigate the mechanisms involved in the production and reduction of nitrous oxide in biological wastewater treatment systems, and to use N₂0 off-gas as a real-time control parameter to assess ammonia oxidation in a simult

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6

Orman, Gavrielle. "A Study on the Simultaneous Nitrification and Denitrification Process of a Membrane Aerated Bioreactor Augmented by BiOWiSH Aqua." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2092.

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Nitrogen pollution is a growing problem that is detrimental to the environment and the economy. Traditional treatment of nitrogen is a multi-stage process, expensive, operationally intensive, and requires large land areas. This research studied the effects of BiOWiSH® Aqua (Aqua), a biological enhancement product, on the simultaneous nitrification and denitrification process in a membrane aerated bioreactor (MABR) to determine if it is a feasible application for wastewater treatment. The MABR used during experimentation was a small-scale batch reactor with a continuous flow of air through a si

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7

Beck, Jason Lee. "Optimization of Biological Nitrogen Removal From Fermented Dairy Manure Using Low Levels of Dissolved Oxygen." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/35593.

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A pilot scale nitrogen (N) removal system was constructed and operated for approximately 365 days and was designed to remove inorganic total ammonia nitrogen (TAN) from solids-separated dairy manure. An anaerobic fermenter, upstream of the N removal reactor, produced volatile fatty acids (VFAs), to be used as an electron donor to fuel denitrification, and TAN at a COD:N ratio of 18:1. However, sufficient amounts of non-VFA COD was produced by the fermenter to fuel the denitrification reaction at an average NO3- removal rate of 5.3 Â± 2 mg/L NO3--N. Total ammonia N was removed from the ferm

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8

Knapp, Leslie Ann. "Study of Process Control Strategies for Biological Nutrient Removal in an Oxidation Ditch." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5249.

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Advanced wastewater treatment plants must meet permit requirements for organics, solids, nutrients and indicator bacteria, while striving to do so in a cost effective manner. This requires meeting day-to-day fluctuations in climate, influent flows and pollutant loads as well as equipment availability with appropriate and effective process control measures. A study was carried out to assess performance and process control strategies at the Falkenburg Road Advanced Wastewater Treatment Plant in Hillsborough County, Florida. Three main areas for control of the wastewater treatment process are aer

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9

Mpongwana, Ncumisa. "Metabolic network modelling of nitrification and denitrification under cyanogenic conditions." Thesis, Cape Peninsula University of Technology, 2019. http://hdl.handle.net/20.500.11838/2982.

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Thesis (PhD (Chemical Engineering))--Cape Peninsula University of Technology, 2019<br>Simultaneous nitrification and aerobic denitrification (SNaD) is a preferred method for single stage total nitrogen (TN) removal, which was recently proposed to improve wastewater treatment plant design. However, SNaD processes are prone to inhibition by toxicant loading with free cyanide (CN-) possessing the highest inhibitory effect on such processes, rendering these processes ineffective. Despite the best efforts of regulators to limit toxicant disposal into municipal wastewater sewage systems (MWSSs), fre

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10

Son, Darin. "Dairy Manure Flushwater Treatment by Algae Raceway Ponds and Aerated Biofilm Reactors." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2222.

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Nitrogen removal technologies can help dairy industries meet their nutrient management needs. This thesis investigated two separate treatment technologies for total ammonia nitrogen (TAN) removal: algae raceway ponds and aerated biofilm reactors. Six 1000- liter algae raceway ponds and four 1000-liter tote tanks, each equipped with 10 sheets of nonwoven geotextile (i.e., thermally bonded or needle-punched) biofilm substrate, were used to treat the effluent from a flush dairy in central coastal California (TAN = 251 mg/L, cBOD5 = 204 mg/L). For the algae raceway ponds (TAN loading rate = 7 - 35

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11

Zhao, Hong Wang. "Oxidation-reduction potential and organic carbon sources as two control parameters for simultaneous nitrification and denitrification in biological nutrient removal processes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0002/NQ27274.pdf.

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Rathore, Komal. "Dynamic Modeling of an Advanced Wastewater Treatment Plant." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7354.

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Advanced wastewater treatment plants have complex biological kinetics, time variant influent rates and long processing times. The modeling and operation control of wastewater treatment plant gets complicated due to these characteristics. However, a robust operational system for a wastewater treatment plant is necessary to increase the efficiency of the plant, reduce energy cost and achieve environmental discharge limits. These discharge limits are set by the National Pollutant Discharge Elimination System (NPDES) for municipal and industrial wastewater treatment plants to limit the amount of n

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13

Filho, Weliton Freire Bezerra. "NitrificaÃÃo e desnitrificaÃÃo simultÃneas em biofiltros aerados com alta densidade de lodo." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=15029.

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Population growth and aspects related to management water resources, make it extremely important to search for simple wastewater treatment systems, low cost and simplicity operational, capable of producing effluent with potential use for compatible many purposes. In this scenario, the use of aerated reactors as post-treatment of anaerobic effluent is shown quite promising for Brazilian reality. This work contributes to the development of new biofilter system for aerobic treatment of sewage, which is being developed at the Federal University of Rio Grande do Norte. The reactor uses corrugated c

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Mota, Lincoln Soares. "Automatização e otimização de sistemas de lodo ativado em regime de bateladas sequenciais visando à remoção biológica de nitrogênio." Universidade Estadual da Paraíba, 2015. http://tede.bc.uepb.edu.br/tede/jspui/handle/tede/2237.

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Submitted by Jean Medeiros (jeanletras@uepb.edu.br) on 2016-03-03T12:40:27Z No. of bitstreams: 2 PDF - Lincoln Soares Mota.pdf: 2256154 bytes, checksum: fefc535e26fd0e60e8d3a07ab15ace28 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Made available in DSpace on 2016-03-03T12:40:27Z (GMT). No. of bitstreams: 2 PDF - Lincoln Soares Mota.pdf: 2256154 bytes, checksum: fefc535e26fd0e60e8d3a07ab15ace28 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2015-06-26<br>Coordenação de Aperfeiçoamento de Pessoa

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Gadêlha, Daví de Andrade Cordeiro. "Desempenho de reator vertical de fluxo contínuo e leito estruturado com recirculação do efluente, submetido à aeração intermitente, para a remoção de nitrogênio de efluente de UASB tratando águas residuárias domesticas." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-13112013-094928/.

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Um Reator com Aeração Intermitente e Leito Estruturado (RAILE) foi testado como pós- tratamento de UASB tratando efluente doméstico. O RAILE foi submetido a ciclos de uma hora de aeração e duas de anoxia, visando obtenção de Nitrificação e Desnitrificação Simultâneas (NDS) para remoção de nitrogênio. A recirculação aplicada foi de 3 vezes a vazão de entrada, para equalização da qualidade do efluente. O reator tem formato cilíndrico e seu meio suporte é espuma de poliuretano na forma de cilindros dispostos verticalmente, suportados por hastes de cloreto de polivinila (PVC) presas

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Murata, Kiemi de Brito. "Remoção de matérias orgânica e nitrogenada de esgoto sanitário em reator de leito estruturado, em escala piloto." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-10052016-143939/.

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O processo de nitrificação e desnitrificação simultâneas (NDS) permite alcançar a remoção combinada de matérias carbonácea e nitrogenada em uma única unidade. O reator de leito estruturado, com biomassa imobilizada e recirculação interna, apresenta características positivas para que estes processos envolvidos ocorram, tais como propiciar a formação de biofilme e evitar a colmatação do leito. Esta configuração tem sido estudada com êxito em reatores em escala de bancada para tratamento de esgoto. Nesta pesquisa foi utilizado um reator de leito estruturado em escala piloto com a finalidade de av

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17

Ersan, Yusuf Cagatay. "The Effects Of Seed Sludge Type And Anoxic/aerobic Period Sequence On Aerobic Granulation And Cod, N Treatment Performance." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615330/index.pdf.

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The aim of this master thesis study was improvement of the required operational conditions for aerobic granulation in sequencing batch reactors (SBRs). In the first part of the study, membrane bioreactor sludge (MBS) and conventional activated sludge (CAS), were used to investigate the effect of suspended seed sludge type on granulation in SBRs. The MBS granules were found to be advantageous in terms of size, resistance to toxic effects, stability and recovery compared to CAS granules. During non-inhibitory conditions, sCOD removal efficiencies were 70&plusmn<br>13% and 67&plusmn<br>11% for M

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18

Oliveira, Daniel Vieira Minegatti de. "Avaliação da remoção de nitrogênio via nitrificação e desnitrificação simultânea em um reator biológico com leito móvel (IFAS)." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3147/tde-03052016-154733/.

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O fenômeno conhecido como Nitrificação e Desnitrificação Simultânea (SND) significa que em um mesmo reator ocorre simultaneamente a nitrificação e a desnitrificação, sob condições de operações idênticas, podendo ser justificada principalmente pela teoria de microambiente no floco ou biofilme. Assim, em um único reator, sob condições controladas de oxigênio dissolvido (OD) e elevados tempos de residênciacelular épossível que ocorra a nitrificação e a criação de zonas anóxicas no interior dos flocos ou biofilme para a ocorrência da desnitrificação. Neste sentido, a tecnologia MBBR/IFAStem como c

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Bueno, Rodrigo de Freitas. "Avaliação na nitrificação e desnitrificação simultânea em estação de tratamento de esgoto em escala real." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3147/tde-13042017-093748/.

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Esta pesquisa teve por objetivo a produção de elementos para a avaliação da viabilidade de se agregar novas tecnologias a uma estação de tratamento de esgoto sanitário pelo processo de lodo ativado com aeração prolongada em escala real. O estudo foi desenvolvido na ETE Limoeiro da SABESP, localizada no Município de Presidente Prudente/SP. Foi estudado a remoção biológica de nitrogênio via nitrificação e desnitrificação simultânea (NDS), controlando-se a idade do lodo e o sistema de fornecimento de ar por meio de sensores de concentração de oxigênio dissolvido de luminescência (LDO), amônia e n

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Bueno, Rodrigo de Freitas. "Nitrificação e desnitrificação simultânea em reator com biomassa em suspensão e fluxo contínuo de esgoto." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/6/6134/tde-09092011-153620/.

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Recentemente foi desenvolvido na Europa o processo conhecido por Nitrificação e Desnitrificação Simultânea (NDS), em que o lodo ativado opera com tempo de retenção de sólidos suficientemente altos para que a nitrificação ocorra mesmo com baixa concentração de oxigênio dissolvido nos tanques de aeração, situação em que é possível a manutenção de condições anóxicas no interior dos flocos e a ocorrência da desnitrificação. Em países de clima tropical, muitas estações de tratamento de esgoto foram construídas ou estão sendo projetadas para operarem sob as condições da variante do processo de lodo

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Silva, Marina Victoretti. "Remoção de nitrogênio via Nitrificação e Desnitrificação Simultânea (NDS) em Biorreatores com Membranas Submersas (BRMS)." reponame:Repositório Institucional da UFABC, 2016.

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Orientadora: Prof.ª Dra Luisa Helena dos Santos Oliveira<br>Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Ciência e Tecnologia Ambiental, 2016.<br>Biorreatores com Membranas Submersas (BRMS) são, atualmente, reconhecidos como opção viável para o tratamento de esgotos sanitários e o reúso de águas. Apesar disso, a tecnologia é geralmente vista como de alto investimento quando comparado a sistemas convencionais de tratamento de esgoto, sobretudo pelo maior gasto energético com aeração do sistema. Porém, BRMS quando operados sob condições específicas para nitr

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Silva, Bruno Garcia. "Efeitos do tempo de aeração no desempenho de reator de leito estruturado e aeração intermitente usado para remoção de matéria orgânica e nitrogênio de efluente de reator UASB." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-25102016-164526/.

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Utilizou-se reator de leito estruturado e aeração intermitente (RLEAI) como pós-tratamento de efluentes de reator UASB tratando esgoto sanitário. O volume total e o tempo de detenção hidráulica (TDH) do reator UASB eram de 11,2 L e 9 horas, respectivamente. O RLEAI possuía volume total de 11,0 L e, devido às hastes cilíndricas verticais de espuma de poliuretano usadas como suporte para a biomassa, o volume útil foi de 9,6 L. Este reator foi operado com um TDH de 12 horas, razão de recirculação igual a 3 e foi alimentado continuamente com efluente do reator UASB. O objetivo deste trabalho foi a

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23

Almeida, Ricardo Gabriel Bandeira de. "Remoção de matéria orgânica residual e nitrogênio de efluente de reator UASB de indústria de insumos para ração animal em reator de leito estruturado." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-22032017-172648/.

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O objetivo do presente trabalho foi avaliar o desempenho de um reator de leito fixo e fluxo ascendente (RLFFA) em escala de bancada submetido à baixa aeração e recirculação. O reator foi utilizado como um sistema de pós-tratamento do efluente de indústria de fabricação de ração animal (INCOFAP) a partir de resíduos de abatedouro de aves, caracterizado por elevada carga de nitrogênio amoniacal. Para tanto, o RLFFA foi avaliado quanto à remoção da fração remanescente de matéria orgânica e de nitrogênio do efluente do reator UASB instalado na indústria. O RLFFA foi operado em con

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Santos, Carla Eloísa Diniz dos. "Influência da relação carbono/nitrogênio e da fonte de carbono no processo de nitrificação desnitrificação simultânea em reator de leito estruturado." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-01092014-092147/.

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Este trabalho buscou avaliar a influência da relação C/N e da fonte de carbono no processo de nitrificação e desnitrificação simultâneas em reator de fluxo contínuo e leito fixo estruturado. Foi utilizado um reator vertical de acrílico, com volume total de 11,0 L e volume útil de 5,5 L, com hastes cilíndricas verticais de espuma de poliuretano como suporte para a biomassa. O sistema foi operado com TDH de 11,2±0,6 horas, aeração intermitente (2 horas com aeração e 1 hora sem aeração) e razão de recirculação de efluente igual a 5. A carga carbonácea afluente foi mantida constante (1,07 kg DQO.m

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Salcedo, Alvaro Javier Moyano. "Remoção de nitrogênio e material orgânico via nitrificação e desnitrificação simultânea (NDS) em biorreator de membranas submersas com biofilme (BRMS-BF) para o tratamento de águas urbanas servidas." reponame:Repositório Institucional da UFABC, 2018.

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Orientador: Prof. Dr. Eduardo Lucas Subtil<br>Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Ciência e Tecnologia Ambiental, Santo André, 2018.<br>O lançamento de águas urbanas servidas (AUS) sem tratamento causa problemas associados à saúde pública e à deterioração dos recursos hídricos. Neste contexto, os Biorreatores com Membranas Submersas (BRMS) e Biofilme (BRMS-BF), operados sob condições específicas para nitrificação e desnitrificação simultâneas (NDS), são uma opção viável para o tratamento de água AUS e seu potencial reúso. Este projeto de pesquisa

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Moura, Rafael Brito de. "Remoção de matéria orgânica e nitrogênio de esgoto sanitário em reator de leito estruturado submetido à aeração intermitente e recirculação do efluente." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-07012015-101331/.

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O objetivo deste trabalho foi o de avaliar o desempenho de um reator de leito estruturado submetido à aeração intermitente (LEAI) na remoção de matéria orgânica e nitrogênio de esgoto sanitário. O reator apresentava um volume total de 11,6 L, com uma porosidade do leito de 52%. O leito estruturado era composto de 13 estruturas cilíndricas (diâmetro igual a 3 cm) de espuma de poliuretano, dispostas verticalmente no interior do reator. A alimentação do reator era feita continuamente com esgoto sanitário, sendo este proveniente de um interceptor de esgoto que passava próximo ao laboratório onde o

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Coma, Bech Marta. "Biological nutrient removal in SBR technology: from floccular to granular sludge." Doctoral thesis, Universitat de Girona, 2011. http://hdl.handle.net/10803/32025.

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Biological nutrient removal has been studied and applied for decades in order to remove nitrogen and phosphorus from wastewater. However, more anthropogenic uses and the continued demand for water have forced the facilities to operate at their maximum capacity. Therefore, the goal of this thesis is to obtain more compact systems for nutrient removal from domestic wastewater. In this sense, optimization and long-term stabilization of high volume exchange ratios reactors, treating higher volumes of wastewater, have been investigated. With the same target, aerobic granular sludge was proposed as

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Wang, Chih-Cheng, and 王至誠. "Development of Simultaneous Partial Nitrification, Anammox and Denitrification (SNAD) process." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/86972633032720955631.

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博士<br>國立交通大學<br>環境工程系所<br>99<br>The Simultaneous partial nitrification, anaerobic ammonium oxidation (Anammox) and denitrification (SNAD) process is an innovative biotechnology for the replacement of the traditional nitrification followed by denitrification. The advantage of the SNAD process include less than 60% of operation cost from aeration over the traditional nitrification followed by denitrification, because only half of ammonium stream is required to converting intonitrite and consequently couples the other half of ammonium stream to nitrogen gas. Moreover, the other merit of the SNAD

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Wu, Yiting, and 吳伊婷. "Application Hydroxylamine to Identify and Model Simultaneous Nitrification and Denitrification (SND) Process." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/45685315521347063824.

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碩士<br>東海大學<br>環境科學與工程學系<br>100<br>This study applying design of experiment (DOE) method to obtain the optimal formula to assembly the pellets rebuild the WAS into porous immobilized pellets, which can both reduce the organic and nutrient substance in wastewaters. Two different carrier ratio (20% and 40%) pellets added to SBBR systems, then, applying NH2OH to identify the model for simultaneous nitrification and denitrification (SND) process. The results indicate WAS content pellets, can obtain an optimal formula sludge 5: laterite 4: chemical additive: 1. The pellet has the compressive stre

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TU, CHE-HAO, and 杜哲豪. "Applying Sequencing Batch Biofilm Reactor (SBBR) to conduct Simultaneous Nitrification and Denitrification (SND)." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/53913779430381211417.

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碩士<br>東海大學<br>環境科學與工程學系<br>105<br>Wasted activated sludge was used to prepare bio-carrier for applying to SBBR bioreactor with different carrier-packing (20% and 40%) to conduct simultaneous nitrification and denitrification (SND) for nitrogen removal in this study. Sludge from Sinfong sanitary landfill leachate treatment plant which was capable of conducting anammox reaction were seeded into the SND system to help decrease carbon source used. The rate of nitrification, denitrification, anaerobic ammonium oxidation have effective due to real-time data (ORP, DO and pH) are further to investiga

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Paetkau, Michelle. "Comparison of Ethinylestradiol and Nitrogen Removal in a Conventional and Simultaneous Nitrification-Denitrification Membrane Bioreactor." 2011. http://hdl.handle.net/1993/4519.

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The purpose of this thesis was to compare ethinylestradiol (EE2) and nitrogen removal in a conventional membrane bioreactor (C-MBR) and a simultaneous nitrification-denitrification membrane bioreactor (SND-MBR). Two MBRs were operated in parallel for 450 days; various MBR operating parameters, total nitrogen removal, and estrogenic activity removal (EA) were measured. The SND-MBR was able to remove 59% of influent TN with an additional 21% removed via sludge wasting; the C-MBR had a TN removal efficiency of only 31%. The C-MBR and SND-MBR removed 57% and 58% of influent EA, respectively. Biode

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Lee, Li-Ling, and 李莉鈴. "The feasibility study of establishing automatic control strategy in simultaneous nitrification and denitrification (SND)." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/75722584200720492787.

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碩士<br>東海大學<br>環境科學系<br>92<br>Recently some laboratory results indicate that the nitrification and denitrification processes can proceed under low DO conditions in a process known as Simultaneous Nitrification and Denitrification (SND). If this cutting-edge SND technology is developed into a practical application technology, the traditional two-stage nitrification and denitrification processes can be replaced by a single-stage SND process and tremendous energy savings can be achieved. Additionally, the operation of the SND process may be controlled using the on-line ORP know-how to attain bet

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藍茜茹. "Development of simultaneous partial nitrification, anammox and denitrification (SNAD) process in a sequential batch reactor." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/16717443781925519459.

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碩士<br>國立交通大學<br>環境工程系所<br>99<br>Abstract To decrease the cost of nitrogen removal process, anaerobic ammonium oxidation (anammox) was developed and coupled with partial nitrification. However, significant quantity of nitrate released from anammox process (10%) is toxic to aquatic environment. Recently, simultaneous partial nitrification, anammox and denitrification (SNAD) process was developed in a sequential batch reactor (SBR) and the influence of hydraulic retention time (HRT) on the SNAD process was investigated in this study. Around 96% NH4+-N removal and 87% COD removal were observed at

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hsu, Zhen-Zong, and 徐振宗. "Influence of dissolved oxygen and hydroxylamine concentration on simultaneous nitrification and denitrification by Ochrobactrum strain THU." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/27869487046749951817.

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碩士<br>東海大學<br>環境科學與工程學系<br>95<br>Ochrobactrum strain THU is a bacterium capable of simultaneous nitrification and denitrification (SND) under high aerobic conditions. The NH4+ removal efficiency of Ochrobactrum strain THU can achieve 99.3% at 4.80 mg/L of dissolve oxygen (DO). The NH4+ removal efficiency by Ochrobactrume strain THU will decrease to 60-70% when DO is higher than 5.40 mg/L. When dissolved oxygen is lower than 3.84 mg/L, the NH4+ removal efficiency by Ochrobactrum strain THU will decrease to 1-60%. Ochrobactrum strain THU has the highest ability of nitrification when DO is 4.

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HO, CHIH CHENG, and 何志誠. "Nitrogen removal through simultaneous nitrification and denitrification in an aerated biological filter using oyster shell medium." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/17647755540524905431.

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碩士<br>國立臺南大學<br>生態科學與技術學系環境生態碩士班<br>105<br>Due intensive discharge of nutrient-containing wastewater, eutrophication has become a common problem of many surface waters. Nitrogen removal from wastewaters is a primary solution for easing eutrophication of these waterbodies. Biological nitrogen removal is commonly adopted for nitrogen removal due to its low cost and environmental friendliness. The various biological nitrogen removing processes can be broadly categorized as suspended growth and attached growth systems. Although suspended growth process such as activated sludge systems has been pop

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Yang, Yun-Wei, and 楊昀尉. "Study and modeling simultaneous nitrification and denitrification (SND) phenomenon in sequencing batch membrane bioreactor (SBMBR) systems." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/95908155562714180681.

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碩士<br>東海大學<br>環境科學系<br>93<br>Nowadays, some scholars reported that nitrification and denitrification can occur concurrently in one reactor under low DO condition (ex. DO: 0-1 mg/L), this is so-called simultaneous nitrification and denitrification (SND). SND reaction can solve the problems for alternating oxic and anoxic period in conventional process. The intermediates, which are potentially harmful to human health, were not accumulated during SND reaction. The objective of this study is to analyze SND phenomenon in sequencing batch membrane bioreactors (SBMBRs) with online monitoring param

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Lin, Yen-chih, and 林彥志. "Simultaneous Nitrification-Denitrification in a Contact Aeration System Using Different Media for the Treatment of Swine Wastewater." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/29809595953675740240.

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碩士<br>國立臺南大學<br>環境生態研究所碩士班<br>100<br>Biological nitrogen removal using simultaneous nitrification-denitrification (SND) process can greatly minimize system requirements and the complexity of system operation. It has gained much attention in recent years. In this study, the SND efficiency of a contact aeration system in the treatment of swine wastewater has been investigated using oyster shells, gravels and quartz ceramics as biofilters. Results show that reasonable hydraulic retention time for the system was 16 hours. Further improvement on nitrogen removal was limited by the lack of organic c

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Ho, Ying-Tsang, and 何盈蒼. "Isolation, characterization and investigation of strain THU, an aerobic denitrifying bacterium capable of simultaneous nitrification-denitrification reaction." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/52040050913520259471.

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碩士<br>東海大學<br>環境科學系<br>89<br>Several strains of denitrifying bacteria were isolated from wastewater treatment plant of Taichung industrial park and Men-Shen sewage treatment plant in this study. In order for further investigation of the characteristics of denitrifying bacteria and denitrification process, an isolate, tentatively named strain THU was chosen and its biochemical characteristics were investigated in this study. Immobilization of strain THU for nitrate removal was done to improve the denitrification efficiency. Strain THU was a gram-negative, strictly aerobic bacterium

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LIN, SHANG-EN, and 林上恩. "Nitrogen Removal from Domestic Wastewater through Simultaneous Nitrification and Denitrification in a Polyeurathane Foam Biological Aerated Filter." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/85278009222357041393.

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碩士<br>國立臺南大學<br>生態科學與技術學系環境生態碩士班<br>104<br>The discharge of excessive nutrients has caused eutrophication of surface waterbodies throughout the world. Nutrient removal has become a necessary procedure for wastewater treatment. In nitrogen removal, biological processes are currently the major technology employed in wastewater treatment. Biofilm technologies has been extensive studied for use in nitrogen removal from wastewater. Simultaneous nitrification and denitrification (SND) using biofilm reactors has the advantage of small size, low sludge production, and system stability. In this study,

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Su, Sin-Han, and 蘇信翰. "Application of Simultaneous Partial Nitrification and Anammox Process for Treatment of High Strength Nitrogen Containing Opto-electronic." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/07204802586028461474.

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碩士<br>國立交通大學<br>環境工程系所<br>100<br>Treatment of two optoelectronic industrial wastewaters (wastewater containing high ammonium concentration (WW1) and wastewater with C/N ratio of 0.2 (WW2)) were achieved using partial nitrification and Anammox processes in a single reactors. 18 L and 2.5 L lab scale sequencing batch reactors (SBR) were used to treat WW1 and WW2, respectively. Essential nutrients and trace elements were added in the influent wastewaters to support the Anammox growth. 18 L SBR (SBR-18) and 2.5 L SBR (SBR-2.5) were run for over 16 months in different stages. Nitrogen loading rate

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Chen, Yi-Chian, and 陳毅謙. "Simultaneous partial Nitrification, Anammox and Denitrification (SNAD) Process in Sequencing Batch Reactor: Fast Start-up and Effects of Zinc." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/61402804201767393492.

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碩士<br>國立交通大學<br>環境工程系所<br>102<br>Anammox has been regarded as the most cost effective and efficient nitrogen removal process. However, its real world applications are limited due to long start-up time. Moreover, heavy metals such as zinc are common in several wastewater streams and can affect the anammox process. Therefore, in this study novel carriers were used to retain biomass for fast start-up of the simultaneous partial nitrification, anammox and denitrification (SNAD) process in a sequencing batch reactor (SBR) and the short- and long-term effects of the zinc on the SNAD process were inv

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Huang, Han-hsien, and 黃瀚賢. "Recycled the wasted sludge to rebuild the nutrient biofilm carrier in simultaneous nitrification and denitrification (SND) system by design of experiment (DOE)." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/73231807570967773487.

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碩士<br>東海大學<br>環境科學與工程學系<br>98<br>In this study, the wasted activated sludge (WAS) from a local municipal wastewater treatment plant in Taichung was mixed with laterite and some chemical additives and then backed to make porous WAS pellets. Optimal formula to assemble the porous pellets was obtained using design of experiment (DOE) method. Various assembling formula between WAS and laterite resulted in different water absorption capacity, bulk density, and compressive strength of the sintered products. Additionally, some nutrients (i.e., KH2PO4, KNO3) were added into the pellets in an attempt

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Liao, Yi-Cheng, and 廖逸誠. "Immobilization of a bacterial strain, strain THU, capable of simultaneous nitrification and denitrification in sequencing batch membrane bioreactor for treating high ammonia concentration wastewater." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/41906522365152465223.

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碩士<br>東海大學<br>環境科學系<br>92<br>The isolate was identified as a strain of Ochrobactrum using 16S rDNA sequence, G+C content and DNA-DNA hybridization (the similarity was 84.6 % between strain THU and Ochrobactrum genus), strain THU should be new specie of Ochrobactrum genus. Proposed name for strain THU, Ochrobactrum aerodenitrificant with hading denitrification capacity under aerobic, initially. When NH4+ concentration was lower than 150 mg/L, the NH4+ removal rate could achieve 96.7 % by O. aerodenitrificant. NH4+ removal rate was between 1-50 % and the specific growth rate only 0-0

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