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Dissertations / Theses on the topic 'Denitrification processe'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

GALLONI, MELISSA GRETA. "DEVELOPMENT OF METAL FUNCTIONALIZED HYDROXYAPATITE CATALYSTS FOR AIR-QUALITY PROTECTION." Doctoral thesis, Università degli Studi di Milano, 2022. http://hdl.handle.net/2434/920030.

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A captivating challenge for environmental catalysis is nowadays the rational design of efficient catalysts able to take on the new challenges in energy, economy, and environment sustainability of industrial processes. A catalytic structure must be developed so as to be active, stable, resistant, when working in the presence of poisons (e.g., water, sulphur), but also easily to handle and manage, non-toxic, biocompatible and bioavailable in the view of environment sustainability and circular economy. In this scenario, hydroxyapatite (HAP, Ca10(PO4)6(OH)2) has emerged as bio-material characteriz

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Torres, Rafael Melo. "Remo??o biol?gica de nitrato em ?gua de abastecimento humano utilizando o endocarpo de coco como fonte de carbono." Universidade Federal do Rio Grande do Norte, 2011. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15978.

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Made available in DSpace on 2014-12-17T15:03:27Z (GMT). No. of bitstreams: 1 RafaelM_DISSERT.pdf: 1989956 bytes, checksum: 4d567b87a39f4ad9191e5a5c7decf060 (MD5) Previous issue date: 2011-08-22<br>The groundwater quality has been compromised as a result of the intensification of human activities over the years. Groundwater contamination by nitrate is one of the effects of this degradation, a socio-environmental problem that affects many regions of the world and particular the city of Natal (RN). Developing techniques for nitrate removal in water is intended to eliminate or reduce the con

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3

Wilson, George B. "Isotope geochemistry and denitrification processes in groundwaters." Thesis, University of Bath, 1986. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370156.

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4

Laughlin, R. J. "Processes responsible for denitrification in a grassland soil." Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403169.

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5

Kjellin, Johan. "Coupled Hydrological and Microbiological Processes Controlling Denitrification in Constructed Wetlands." Licentiate thesis, Stockholm : [Mark- och vattenteknik, Kungliga Tekniska högskolan], 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4370.

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6

Holman, Joseph Bernard. "The application of pH and ORP process control parameters within the aerobic denitrification process." Thesis, University of Canterbury. Civil Engineering, 2004. http://hdl.handle.net/10092/7201.

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Aerobic denitrification is a biological nitrogen removal process in which nitrification and denitrification occur simultaneously (in the same reactor) under identical environmental conditions. This contrasts to traditional separate stage nitrification denitrification in which the nitrification and denitrification processes occur sequentially in different reactors under opposing environmental conditions. While aerobic denitrification has long been identified in other ecosystems (such as the nitrogen cycle within soil) it was not thought possible within wastewater treatment processes. The existe

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7

Calderer, Perich Montserrat. "Study of Denitrification and Reductive Dechlorination Processes Applied to Groundwater Bioremediation." Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/6996.

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La present tesi es basa en l'estudi dels processos de bioremediació com a tecnologies de descontaminació d'aqüífers.<br/>Concretament, es pretén estudiar la desnitrificació i la decloració reductiva com a tecnologies de bioremediació per eliminar, respectivament, els nitrats i els hidrocarburs alifàtics clorats (o CAHs, de chlorinated aliphatic hydrocarbons) de les aigües subterrànies contaminades. A més, es pretén aplicar tecnologies avançades que permetin millorar en el coneixement d'aquests processos.<br/>L'aqüífer associat a la riera d'Argentona, situat a Argentona (Espanya), ha estat la z

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8

Araujo, Granda Pablo Alejandro. "Developing an individual-based model to study the bacterial denitrification process." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/405704.

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It is crucial to study the denitrification process driven by bacteria as it is one of the most important environmental processes for several reasons: i) it has an application in the removal of nitrogen (N) from high-N waste materials ii), it is one of the mechanisms to N-fertilizer¿s loss, iii) it contributes to the emissions of gasses with large global warming potential, and iv) it is the mechanism by which the global nitrogen cycle is balanced. Many models have been developed in the framework of continuous models to deal with the complexity of the denitrification process in order to become

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9

Tsang, Wai Lik. "Performance of sulfate reduction, autotrophic denitrification, and nitrification integrated process (SANI process) for saline sewage treatment /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202007%20TSANG.

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10

HENNI, MARC. "Denitrification et dephosphatation des eaux usees urbaines par les procedes biologiques." Strasbourg 1, 1993. http://www.theses.fr/1993STR15076.

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11

Clayton, 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.

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In order to size the anoxic reactors in nutrient (N and P) removal activated sludge plants, it is essential to know the denitrification kinetics that are operative in such systems. To date, denitrification kinetics have been accurately defined only for systems that remove N alone; little research has been performed on denitrification in N and P removal plants.

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12

LI, JIN. "AZO DYE BIODEGRADATION AND INHIBITION EFFECTS ON AEROBIC NITRIFICATION AND ANOXIC DENITRIFICATION PROCESSES." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1006802895.

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13

Doyle, Erin E. Van Walsum G. Peter. "The fate of phosphate in the MixAlco process and its applicability to a Central Texas watershed." Waco, Tex. : Baylor University, 2006. http://hdl.handle.net/2104/4870.

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14

Langone, Michela. "Simultaneous partial Nitritation, Anammox and Denitrification (SNAD) process for treating ammonium-rich wastewaters." Doctoral thesis, Università degli studi di Trento, 2013. https://hdl.handle.net/11572/368108.

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Biological nitrogen removal from strong ammonium wastewaters received a great deal of attention during the last years. Since the discovery of anammox bacteria the traditional theory of biological nitrogen removal has been extended to new nitrogen metabolic pathways. This thesis deals with the study of Simultaneous partial Nitritation, Anammox and Denitrification (SNAD) process in a Sequencing Batch Reactor (SBR) to treat wastewaters with a high ammonium load and low biodegradable organic matter, such as anaerobic digester effluent and old landfill leachate. The bacterial diversity in the react

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15

Langone, Michela. "Simultaneous partial Nitritation, Anammox and Denitrification (SNAD) process for treating ammonium-rich wastewaters." Doctoral thesis, University of Trento, 2013. http://eprints-phd.biblio.unitn.it/1029/1/PhD_Thesis_Michela_Langone.pdf.

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Biological nitrogen removal from strong ammonium wastewaters received a great deal of attention during the last years. Since the discovery of anammox bacteria the traditional theory of biological nitrogen removal has been extended to new nitrogen metabolic pathways. This thesis deals with the study of Simultaneous partial Nitritation, Anammox and Denitrification (SNAD) process in a Sequencing Batch Reactor (SBR) to treat wastewaters with a high ammonium load and low biodegradable organic matter, such as anaerobic digester effluent and old landfill leachate. The bacterial diversity in the react

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16

Rahman, Md Mizanur. "Microbial biodiversity in a wooded riparian zone specifically designed for enhancing denitrification process." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3427451.

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This research is part of a project aimed at verifying the potential of a specifically assessed wooded riparian zone in removing excess of combined nitrogen from the Zero river flow for the reduction of nutrient input into Venice Lagoon. General objectives of this project were to increase knowledge on the processes which allow the riparian strips to act as a buffer and to identify the most appropriate management strategies in order to maximize the efficiency of these systems in supporting the microbial activities involved in the process. For this purpose, specific objectives were pursued to det

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17

Printz, Kathryn Elizabeth. "The Investigation of Nitrite Accumulation and Biological Phosphorus Removal in an Intermittently Aerated Process Combining Shortcut Nitrogen Removal and Sidestream Biological Phosphorus Removal." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/95853.

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The research in this thesis was conducted at the Hampton Road Sanitation District's biological nutrient removal pilot, located at the Chesapeake-Elizabeth WWTP in Virginia Beach, VA. The pilot is operated in an A/B process with a high-rate, carbon-diverting A-stage, followed by a biological nitrogen removal B-stage containing four intermittently aerated CSTRs, followed by an anammox polishing MBBR. The goal of this research was to successfully combine short-cut nitrogen removal with sidestream enhanced biological nutrient removal (EBPR) in the most efficient way possible, specifically aiming t

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18

Omena, Sylvia Paes Farias de. "Remoção de fenol em reator anaeróbio de leito fluidificado sob condições desnitrificantes." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-03122008-165104/.

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Este trabalho teve como objetivo geral a caracterização de um sistema de tratamento biológico de remoção de fenol em reator anaeróbio de leito fluidificado utilizando o nitrato como aceptor final de elétrons. O reator foi construído em acrílico transparente, com dimensões equivalentes a 190 cm de altura e 5,3 cm de diâmetro interno, totalizando um volume de 4192 cm³, dos quais cerca de 44% (1831 cm³) foram ocupados pelo meio suporte, na situação de leito fixo. Para imobilização da biomassa foram utilizadas partículas de poliestireno, que foram previamente ativadas através de ataque ácido, com

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19

Skirfors, Oscar. "Using bioaugmentation to enhance the denitrification process in a treatment plant for landfill leachate." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278592.

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It has been illegal to deposit household waste in Swedish landfills since 2005. The large amount of waste deposited prior to this does however continue to pose an environmental concern, mainly in the form of leachate water. This study focused on enhancing the denitrification process in a leachate water treatment plant through bioaugmentation. The two strains Brachymonas denitrificans and Comamonas denitrificans as well a commercial seed mix from ClearBlu Environmental® (CBE-mix) containing amongst others, Pseudomonas putida AD 21 and Pseudomonas fluorescens, were investigated as candidates. Ni

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20

He, Xuan (Sarah). "The use of naturally generated volatile fatty acids for pesticide removal during the denitrification process." Thesis, University of Canterbury. Civil Engineering, 2006. http://hdl.handle.net/10092/1169.

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The effect of naturally produced volatile fatty acids (VFAs) on the removal of 2, 4-D from a wastewater during the denitrification process was studied in this thesis. The VFAs were generated from an anaerobic digester using soya flour solution as a synthetic feed. The digester was operated at an SRT and HRT of 10 days. The pH (4.8 ± 0.2) and temperature (32 ± 3 ℃) of the digester were not controlled. A mean VFA concentration of 3153 ± 801 mg/L was achieved with acid speciation results of acetic (51.4 %), propionic (27.5 %), n-butyric (19.6 %) and iso-valeric (1.4 %). The specific VFA productio

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21

Shi, Manyuan. "Characterization of sulfate-reducing and denitrifying microbial community in sulfate reduction, autotrophic denitrification and nitrification integrated process (SANI process) /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202009%20SHI.

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22

Neal, Vance A. "Effects of copper on nitrification and denitrification of leachate from an abandoned landfill." Thesis, Virginia Tech, 1992. http://hdl.handle.net/10919/42618.

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The purpose of this study was to investigate the effects of copper on the treatment of an abandoned landfill leachate by a Modified Ludzack Ettinger (MLE) single-sludge, activated sludge treatment system. MLE systems are designed to accomplish nitrification and denitrification, and at least two systems were used: one to which copper was added, and one maintained as a control. The system that did not receive copper additions gave an indication of the treatability of the leachate by an MLE system. Copper was added at concentrations of 1.0, 2.0, 2.5, and 5.0 mgCu/L in the influent and the sludge

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23

Sriwiriyarat, Tongchai. "Mathematical Modeling and Evaluation of Ifas Wastewater Treatment Processes for Biological Nitrogen and Phosphorus Removal." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/28733.

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The hybrid activated sludge-biofilm system called Integrated Fixed Film Activated Sludge (IFAS) has recently become popular for enhanced nitrification and denitrification in aerobic zones because it is an alternative to increasing the volume of treatment plant units to accomplish year round nitrification and nitrogen removal. Biomass is retained on the fixed-film media and remains in the aerobic reactor, thus increasing the effective mean cell resident time (MCRT) of the biomass and providing the temperature sensitive, slow growing nitrifiers a means of staying in the system when they otherwi

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24

McCue, Terrence. "EVALUATION OF PREFERMENTATION AS A UNIT PROCESS UPON BIOLOGICAL NUTRIENT REMOVAL INCLUDING BIOKINETIC AND WASTEWATER PARAMETERS." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3031.

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The objective of this dissertation was to provide a controlled comparison of identical continuous flow BNR processes both with and without prefermentation in order to provide a stronger, more quantitative, technical basis for design engineers to evaluate the potential benefits of prefermentation to EBPR in treating domestic wastewater. In addition, the even less understood effect of prefermentation on denitrification kinetics and anoxic phosphorus (P) uptake was studied and quantified. Other aspects of BNR performance, which might change due to use of prefermentation, will also be addressed, i

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25

Pan, Chengyang. "Application of volatile fatty acids from waste as an external carbon source for the denitrification process." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264538.

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The gap between resource demand for the industrialized world and non-renewable feedstock like fossil fuels, essential agricultural fertilizer is getting increasingly severe, which has resulted in alarming-increasingly impacts on worldwide environmental problems. Meanwhile, wastewater treatment plants (WWTPs), as an essential facility for urbanization, is also confronting new rising challenges such as energy consumption and operation costs rather than only improving effluent wastewater quality. It is thereby important to develop new approaches for next-generation WWTPs with less energy consumpt

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26

Qu, Wenchuan. "Studies on nitrogen cycling processes in Lake Illawarra, New South Wales, Australia." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20050302.161641/index.html.

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27

Jones, Emlyn Morris, and emlyn jones@csiro au. "The interaction between physical and sedimentary biogeochemical processes in south-west Spencer Gulf, South Australia." Flinders University. School of the Environment, 2010. http://catalogue.flinders.edu.au./local/adt/public/adt-SFU20100531.124356.

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Located in the south-west region of Spencer Gulf, South Australia, a multi-million dollar aquaculture industry based on the ranching of southern bluefin tuna (Thunnus maccoyii) contributes significantly to the regional economy. The interaction between aquaculture activities and the environment is of significant interest to industry stakeholders, management authorities and the broader science community. No studies, to the best of my knowledge, have investigated the relationships between the hydrodynamics and biogeochemistry of the system and the ability of the benthic ecosystem to deal with the

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28

Deemer, Bridget Read. "Thermal stratification impacts microbial nitrogen removal and nitrous oxide production in a small eutrophic reservoir an in-situ approach to quantifying hypolimnetic process rates /." Pullman, Wash. : Washington State University, 2010. http://www.dissertations.wsu.edu/Thesis/Spring2010/B_Deemer_042310.pdf.

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Thesis (M.S. in environmental science)--Washington State University, May 2010.<br>Title from PDF title page (viewed on July 21, 2010). "School of Earth and Environmental Science." Includes bibliographical references (p. 23-28).

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29

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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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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Sriwiriyarat, Tongchai. "Computer Program Development for the Design of IFAS Wastewater Treatment Processes." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/32065.

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The Integrated Film Activated Sludge Process (IFAS) was developed to reduce the cost of additional facilities required to complete year round nitrification in the design of new or retrofit wastewater treatment plants. The purpose of this project was to develop a computer-based mechanistic model, called IFAS, which can be used as a tool by scientists and engineers to optimize their designs and to troubleshoot a full-scale treatment plant. The program also can be employed to assist researchers conducting their studies of IFAS wastewater treatment processes. IFAS enables the steady-state simulati

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32

Panthi, Sudan Raj. "Effect of Arsenic on the Denitrification Process in the Presence of Naturally-Produced Volatile Fatty Acids and Arsenic Removal by New Zealand Iron Sand (NZIS)." Thesis, University of Canterbury. Department of Civil and Natural Resources Engineering, 2009. http://hdl.handle.net/10092/3199.

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This thesis is comprised of two phases; the first phase concerns the effect of arsenic on the denitrification process in the presence of naturally-produced volatile fatty acids (VFAs); while the second phase evaluates the arsenic removal efficiency of New Zealand Iron Sand (NZIS) by adsorption. To accomplish the first phase of the study, VFAs were first produced naturally in an acid-phase anaerobic digester by using commercially-available soy flour. Secondly, a denitrifying biomass was cultivated in a sequencing batch reactor (SBR) using domestic wastewater as a feed solution. Finally, a ser

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33

Yatham, Venkata Krishna Reddy. "Study of Nitrogen Removal Rate and Trouble shooting of Pilot plant (ITEST)." Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171806.

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This paper is about improving the efficiency of nitrogen and other organic nutrient removal from activated sewage treatment by adopting an innovative technology. The work is to study the changes in nitrogen removal in pilot-scale experiments with the ITEST unit. The report also describes the various sources contributing to the eutrophication of the sea and water, caused by an increase in nutrient levels in different water bodies. Ineffective treatment of sewage contributes to the eutrophication. In the Baltic regions the temperature will be zero (0) or less than zero degree-centigrade during w

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Elrod, Jon L. B. S. "A Case Study Analysis of Parameter Effects within the Nitrification and Denitrification Processes of Rendering Wastewater using Data Mining Techniques." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1367940889.

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35

Martinelli, Agnese. "Processes influencing the nitrate concentration in an aquifer for drinking water production in Bremen-Nord - Northern Germany." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10131/.

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Groundwater represents the most important raw material. Germany struggles to maintain the best water quality possible by providing advanced monitoring systems and legal measures to prevent further pollution. In areas involved in the intensive growing of plantations, one of the major contamination factors derives from nitrate. The aim of this master thesis is the characterisation of the Water Protection Area of Bremen (Germany). Denitrification is a natural process, representing the best means of natural reduction of the hazardous nitrate ion, which is dangerous both for human health and for

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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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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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38

Alharbi, Njud Saleh F. "The investigation of microbial denitrification processes for the removal of nitrate from water using bio-electrochemical methods and carbon nano-materials." Thesis, Swansea University, 2012. https://cronfa.swan.ac.uk/Record/cronfa42645.

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With ever increasing regulation of the quality of drinking water and wastewater treatment, there is a need to develop methods to remove nitrogenous compounds from water. These processes are mediated by a variety of micro-organisms that can oxidise ammonia to nitrate, and then reduced to gaseous nitrogen by another set of organisms. This two stage process involves the relatively slow oxidation of ammonia to nitrate followed a relatively fast reduction of nitrate to nitrogen. Nitrate reduction normally requires anaerobic environments and the addition of organic matter to provide reducing power (

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Edelfeldt, Stina. "Evaluation and Comparison of Ecological Models Simulating Nitrogen Processes in Treatment Wetlands,Implemented in Modelica." Thesis, Linköping University, Department of Science and Technology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2879.

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<p>Two ecological models of nitrogen processes in treatment wetlands have been evaluated and compared. These models have been implemented, simulated, and visualized in the Modelica language. The differences and similarities between the Modelica modeling environment used in this thesis and other environments or tools for ecological modeling have been evaluated. The modeling tools evaluated are PowerSim, Simile, Stella, the MathModelica Model Editor, and WEST. </p><p>The evaluation and the analysis have been performed using McCall’s factors for software quality (McCall et al, 1977), a correlatio

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Purba, Aldonna Jasa Prima. "The generation of nitrous oxide in bio-linesat the Wastewater Treatment Plant in Halmstad." Thesis, Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-45091.

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This study describes the variation of an important greenhouse gas, nitrous oxide (N2O) at site-specific from the bio-lines unit at Wastewater Treatment Plant (WWTP) in Halmstad. The sampling campaign at the WWTP was carried out for three consecutive days during the weekdays in March 2021 with total of 144 samples were taken in GHG sample vials (exetainers) and analysed for N2O measurements using gas chromatography. Other nitrogen parameters data (NO2-N, NO3-N, and total nitrogen) were also collected. Using statistical analysis, comparisons were focused on a year period (March 2020 and 2021). T

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41

Garbossa, Luis Hamilton Pospissil. "Avaliação de sistemas anaeróbio - aeróbio com biomassa imobilizada para remoção de matéria carbonácea e nitrogênio de esgoto sanitário e uso do biogás na desnitrificação." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-23112006-214314/.

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Este trabalho de doutorado apresenta os resultados da avaliação de duas configurações diferentes de reatores com biomassa imobilizada em matrizes cúbicas de poliuretano, denominados reator misto radial de leito fixo (RMRLF), utilizado para o tratamento de esgoto sanitário peneirado e reator aeróbio-anaeróbio horizontal de leito fixo (RAAHLF) para o pós-tratamento de efluente de reator de manta de lodo tipo upflow anaerobic sludge blanket (UASB) tratando esgoto sanitário. O estudo avalia duas propostas de tratamento para remoção biológica de matéria orgânica e nitrogênio por meio do acompanhame

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Mekuto, Lukhanyo. "A mixed microbial community for the treatment of free cyanide and Thiocyanate containing wastewater." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2555.

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Thesis (DTech (Chemical Engineering))--Cape Peninsula University of Technology, 2017.<br>Industrial wastewater management pertaining to the mining industry has become increasingly stringent, with companies being required to develop environmentally benign wastewater management practices worldwide. The industries that utilise cyanide compounds for the recovery of precious and base metals in a process known as the cyanidation process, have contributed substantially to environmental deterioration and potable water reserve contamination due to the discharge of poorly treated, or untreated, cyanide

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Bergkvist, Sophie. "Rejektvattenbehandlingens inverkan på kvävereduktionen vid Arboga reningsverk." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-181029.

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Under 90-talet uppdagades övergödningsproblematiken i Östersjön, varför omgivande länder enades gällande åtgärder för att minska problemen. De svenska reningsverk som genom sina utsläpp av kväve och fosfor påverkade Östersjön tvingades då införa gränsvärden för kväve- och fosforutsläppen. Vid Arboga reningsverk, vars recipient är Arbogaån som mynnar i Galten, Mälaren, har kvävereducering sedan en tid tillbaka varit i drift. Dock krävdes från och med år 2012 att totalkvävehalten i utgående avloppsvatten ej översteg 15 mg tot-N/l. Införandet av detta gränsvärde resulterade i åtgärder för att min

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Oliveira, André Luiz de. "Influência do tipo de matéria orgânica no processo de desnitrificação em reatores seqüenciais em batelada." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-02022017-113638/.

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Este trabalho apresenta o desempenho de um sistema de reatores seqüenciais em batelada aeróbio/anaeróbio, na remoção de matéria carbonácea (DQO) e nitrogenada, no tratamento de esgoto sanitário sintético, simulando esgoto doméstico. O sistema era composto por dois reatores dispostos em série, um aeróbio (RSBAe), responsável pela remoção de matéria carbonácea e nitrificação e outro, anaeróbio (RSBAn), responsável pela desnitrificação. Os reatores foram construídos em acrílico transparente, com volume total de 16,5 L e volume útil de 13,5 L. A operação dos reatores foi realizada com ciclos de 12

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Nordenborg, Åsa. "Luftflödesstyrning på Käppalaverket – utvärdering av konstanta styrsignaler." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-148629.

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På Käppalaverket i Stockholm står luftningen av de biologiska bassängerna för omkring en femtedel av verkets totala elenergiförbrukning. I ett försök att minska energikostnaden utvärderades under hösten 2010 nya metoder för luftflödesreglering på verket. Grundtanken var att styra luftflödet efter medelvärdet på utgående ammoniumkoncentration under en längre tid, istället för som idag efter momentana värden. Ett vanligt sätt att styra luftflöden på reningsverk idag är att använda återkoppling från utgående ammoniumkoncentration, vilket syftar till att alltid hålla den utgående koncentrationen v

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Estrup, Andersen Hans. "Hydrology, nutrient processes and vegetation in floodplain wetlands." Copenhagen : Den kgl. Veterinær- og Landbohøjskole, 2002. http://www2.dmu.dk/1_viden/2_Publikationer/3_Ovrige/rapporter/Phd_HEA.pdf.

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Thunberg, Andreas. "Energieffektivisering av luftningssteget på Käppalaverket, Lidingö." Thesis, Uppsala University, Department of Earth Sciences, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88824.

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<p>This master thesis in energy optimization was made during the autumn of 2006 at Käppala wastewater treatment plant in Lidingö, Stockholm. A preceding thesis, where all electricity consumption was mapped, showed that the aeration in the biological treatment is the single largest consumer in the plant, and it is therefore of interest to reduce this cost. The oxygen control strategy used at Käppala WWTP is working well from a nutrient removal point of view, but not from an economic one. The last aerobic zones have a very low oxygen consumption during low loading periods which give rise to enha

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Carrey, Labarta Raúl. "Natural and Induced Nitrate Attenuation Processes in Pétrola Basin (Albacete, Spain)." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/145971.

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One of the main problems of diffused groundwater contamination is produced by nitrate (NO3‾). NO3‾ pollution is linked with fertilizer application, manure management and wastewater. Many areas of Spain have NO3‾ concentration over the human consumption (0.8 mM NO3‾) established by the Directive 98/83/CE. Endorheic basins located in semiarid or arid regions constitute one of the most vulnerable environments to NO3‾ pollution. The Petrola basin (Central Spain) is an outstanding example of these endorheic systems. Nitrate concentration in surface and groundwater from Petrola basin ranged from <1.

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McMillan, Morgan. "Biological treatment of source separated urine in a sequencing batch reactor." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96047.

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Thesis (MScEng) -- Stellenbosch University, 2014.<br>ENGLISH 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 discha

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Moraes, Bruna de Souza. "Desnitrificação autotrófica com o uso de sulfeto e integração com o processo de nitrificação em um único reator." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-04052012-092252/.

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A remoção de nitrogênio acoplada à oxidação de sulfeto pode ser uma opção adequada para o pós-tratamento de efluentes de reatores anaeróbios, os quais contêm nitrogênio amoniacal, que deve ser nitrificado, e sulfeto, que poderia ser utilizado como doador de elétrons endógeno para a desnitrificação autotrófica. Com base nessa constatação, esta pesquisa propôs a aplicação da nitrificação e desnitrificação autotrófica acoplada à oxidação de sulfeto, em um único reator, para a remoção de nitrogênio de efluentes de reatores anaeróbios tratando esgoto sanitário. Visto que existem lacunas na literatu

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