Optimisation of biological nitrogen removal processes to treat reject water from anaerobic digestion of sewage sludge

In the present work, the biological treatment of real reject water (800 mg NH4+-N L-1) from anaerobic digestion of sewage sludge from a waste water treatment plant (WWTP) is carried out. <br/>The process was optimised with a Sequencing Batch Reactors (SBR) of 3 L using methanol for denitrifica...

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Detalles Bibliográficos
Autor: Galí Serra, Alexandre
Tipo de recurso: tesis doctoral
Estado:Versión publicada
Fecha de publicación:2006
País:España
Institución:CBUC, CESCA
Repositorio:TDR. Tesis Doctorales en Red
OAI Identifier:oai:www.tdx.cat:10803/1527
Acceso en línea:http://www.tdx.cat/TDX-1016106-115805
http://hdl.handle.net/10803/1527
Access Level:acceso abierto
Palabra clave:Dentrificació
Nitrificació
Clavegueram
Tecnologia de depuració d'aigues
Ciències Experimentals i Matemàtiques
628
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spelling Optimisation of biological nitrogen removal processes to treat reject water from anaerobic digestion of sewage sludgeGalí Serra, AlexandreDentrificacióNitrificacióClavegueramTecnologia de depuració d'aiguesCiències Experimentals i Matemàtiques628In the present work, the biological treatment of real reject water (800 mg NH4+-N L-1) from anaerobic digestion of sewage sludge from a waste water treatment plant (WWTP) is carried out. <br/>The process was optimised with a Sequencing Batch Reactors (SBR) of 3 L using methanol for denitrification due to the lack of a readily biodegradable organic carbon source. Process kinetics were compared through the specific Ammonium Uptake Rate (sAUR) finding the appropriate operational sequence at 32ºC with an 8 hour cycle length. Every operational cycle was carried out with a solid retention time (SRT) of 11 days, hydraulic retention time (HRT) of 1 day and 2500 mg VSS L-1. In order to avoid nitrate formation, and thus to save costs, the oxygen concentration was maintained below 1 mg L-1 during the aerobic periods and pH remained within an optimal range (7.5-8.5) alternating different aerobic/anoxic sub-cycles inside the operational cycle. The total nitrogen removal was 0.8-0.9 kg N day-1 m-3. In order to make the process more economical metanol was substitute for the primary hidrolysate of the own WWTP obtaining a total nitrogen removal of 0.7 kg N day-1 m-3. The use of primary hidrolysate would lead to a cost reduction of 0.2-0.3 kg -1 N removed.<br/>The next step was to compare the SBR technology to obtain the nitrite route with the continuous technology using a chemostat reactor. In that a chemostat SHARON (Single-reactor High activity Ammonia Removal Over Nitrite) continuous reactor (4 L) was operated to develop the biological nitrogen removal via nitrite of reject water at 33 ºC. Methanol was added for denitrification In the same chemostat took place nitrification and denitrification alternating periods of 1 hour with a total HRT of 2. As a conclusion, the SBR would be a slightly cheaper process (1.01 versus 1.28 kg -1 N) due to the higher volumetric reaction rates and the SHARON process is a more stable system.Universitat de BarcelonaMata Álvarez, JoanUniversitat de Barcelona. Departament d'Enginyeria Química i Metal·lúrgia2011200620062006info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://www.tdx.cat/TDX-1016106-115805http://hdl.handle.net/10803/1527TDX (Tesis Doctorals en Xarxa)reponame:TDR. Tesis Doctorales en Redinstname:CBUC, CESCAInglésADVERTIMENT. L'accés als continguts d'aquesta tesi doctoral i la seva utilització ha de respectar els drets de la persona autora. Pot ser utilitzada per a consulta o estudi personal, així com en activitats o materials d'investigació i docència en els termes establerts a l'art. 32 del Text Refós de la Llei de Propietat Intel·lectual (RDL 1/1996). Per altres utilitzacions es requereix l'autorització prèvia i expressa de la persona autora. En qualsevol cas, en la utilització dels seus continguts caldrà indicar de forma clara el nom i cognoms de la persona autora i el títol de la tesi doctoral. No s'autoritza la seva reproducció o altres formes d'explotació efectuades amb finalitats de lucre ni la seva comunicació pública des d'un lloc aliè al servei TDX. Tampoc s'autoritza la presentació del seu contingut en una finestra o marc aliè a TDX (framing). Aquesta reserva de drets afecta tant als continguts de la tesi com als seus resums i índexs.info:eu-repo/semantics/openAccessoai:www.tdx.cat:10803/15272026-06-14T12:46:07Z
dc.title.none.fl_str_mv Optimisation of biological nitrogen removal processes to treat reject water from anaerobic digestion of sewage sludge
title Optimisation of biological nitrogen removal processes to treat reject water from anaerobic digestion of sewage sludge
spellingShingle Optimisation of biological nitrogen removal processes to treat reject water from anaerobic digestion of sewage sludge
Galí Serra, Alexandre
Dentrificació
Nitrificació
Clavegueram
Tecnologia de depuració d'aigues
Ciències Experimentals i Matemàtiques
628
title_short Optimisation of biological nitrogen removal processes to treat reject water from anaerobic digestion of sewage sludge
title_full Optimisation of biological nitrogen removal processes to treat reject water from anaerobic digestion of sewage sludge
title_fullStr Optimisation of biological nitrogen removal processes to treat reject water from anaerobic digestion of sewage sludge
title_full_unstemmed Optimisation of biological nitrogen removal processes to treat reject water from anaerobic digestion of sewage sludge
title_sort Optimisation of biological nitrogen removal processes to treat reject water from anaerobic digestion of sewage sludge
dc.creator.none.fl_str_mv Galí Serra, Alexandre
author Galí Serra, Alexandre
author_facet Galí Serra, Alexandre
author_role author
dc.contributor.none.fl_str_mv Mata Álvarez, Joan
Universitat de Barcelona. Departament d'Enginyeria Química i Metal·lúrgia
dc.subject.none.fl_str_mv Dentrificació
Nitrificació
Clavegueram
Tecnologia de depuració d'aigues
Ciències Experimentals i Matemàtiques
628
topic Dentrificació
Nitrificació
Clavegueram
Tecnologia de depuració d'aigues
Ciències Experimentals i Matemàtiques
628
description In the present work, the biological treatment of real reject water (800 mg NH4+-N L-1) from anaerobic digestion of sewage sludge from a waste water treatment plant (WWTP) is carried out. <br/>The process was optimised with a Sequencing Batch Reactors (SBR) of 3 L using methanol for denitrification due to the lack of a readily biodegradable organic carbon source. Process kinetics were compared through the specific Ammonium Uptake Rate (sAUR) finding the appropriate operational sequence at 32ºC with an 8 hour cycle length. Every operational cycle was carried out with a solid retention time (SRT) of 11 days, hydraulic retention time (HRT) of 1 day and 2500 mg VSS L-1. In order to avoid nitrate formation, and thus to save costs, the oxygen concentration was maintained below 1 mg L-1 during the aerobic periods and pH remained within an optimal range (7.5-8.5) alternating different aerobic/anoxic sub-cycles inside the operational cycle. The total nitrogen removal was 0.8-0.9 kg N day-1 m-3. In order to make the process more economical metanol was substitute for the primary hidrolysate of the own WWTP obtaining a total nitrogen removal of 0.7 kg N day-1 m-3. The use of primary hidrolysate would lead to a cost reduction of 0.2-0.3 kg -1 N removed.<br/>The next step was to compare the SBR technology to obtain the nitrite route with the continuous technology using a chemostat reactor. In that a chemostat SHARON (Single-reactor High activity Ammonia Removal Over Nitrite) continuous reactor (4 L) was operated to develop the biological nitrogen removal via nitrite of reject water at 33 ºC. Methanol was added for denitrification In the same chemostat took place nitrification and denitrification alternating periods of 1 hour with a total HRT of 2. As a conclusion, the SBR would be a slightly cheaper process (1.01 versus 1.28 kg -1 N) due to the higher volumetric reaction rates and the SHARON process is a more stable system.
publishDate 2006
dc.date.none.fl_str_mv 2006
2006
2006
2011
dc.type.none.fl_str_mv info:eu-repo/semantics/doctoralThesis
info:eu-repo/semantics/publishedVersion
format doctoralThesis
status_str publishedVersion
dc.identifier.none.fl_str_mv http://www.tdx.cat/TDX-1016106-115805
http://hdl.handle.net/10803/1527
url http://www.tdx.cat/TDX-1016106-115805
http://hdl.handle.net/10803/1527
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universitat de Barcelona
publisher.none.fl_str_mv Universitat de Barcelona
dc.source.none.fl_str_mv TDX (Tesis Doctorals en Xarxa)
reponame:TDR. Tesis Doctorales en Red
instname:CBUC, CESCA
instname_str CBUC, CESCA
reponame_str TDR. Tesis Doctorales en Red
collection TDR. Tesis Doctorales en Red
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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