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Article: Autotrophic biological nitrogen removal from saline wastewater under low DO
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TitleAutotrophic biological nitrogen removal from saline wastewater under low DO
 
AuthorsZhang, T1
Yan, QM1
Ye, L1
 
KeywordsAnammox bacteria
AOB
Nitrogen removal
 
Issue Date2010
 
PublisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/2517
 
CitationJournal Of Chemical Technology And Biotechnology, 2010, v. 85 n. 10, p. 1340-1345 [How to Cite?]
DOI: http://dx.doi.org/10.1002/jctb.2438
 
AbstractBACKGROUND: This study was conducted to investigate the feasibility and performance of nitrogen removal through the complete autotrophic nitrogen removal over nitrite (CANON) process for saline wastewater in a continuous reactor, and to characterize microorganisms in the sludge from the reactor using DNA-based techniques. RESULTS: The nitrogen removal experiment in the reactor was operated over five phases for 286 days treating a synthetic sewage of 1.2% salinity at 21-25 °C. At dissolved oxygen (DO) concentrations of 0.5-1.0 mg L -1 and in the presence of glucose, NO 2 - was accumulated, indicating the activity of ammonia-oxidizing bacteria (AOB). At DO concentration of 0.5 mg L -1 without organic substrate, the anaerobic ammonium oxidation (Anammox) process was the major pathway responsible for nitrogen removal, with a total nitrogen removal of 70% and an ammonium conversion efficiency of 96%. A maximum ammonium removal rate of 0.57 kg-N m -3 d -1 was achieved during the experimental period. The concentrations of AOB and Anammox bacteria were monitored over the operation of reactor using quantitative real-time polymerase chain reaction (qRT-PCR). CONCLUSION: In this study, autotrophic nitrogen removal process was achieved under salinity condition in a one-reactor system. An over 100 fold increase of AOB was found due to the increased supply of ammonium at the beginning, then AOB concentration decreased temporarily in correspondence with the decreased DO, and the AOB resumed their concentration at the last phase. The Anammox bacteria abundance was about 150 fold higher than that at the beginning, indicating the successful enrichment of Anammox bacteria in the reactor. © 2010 Society of Chemical Industry.
 
ISSN0268-2575
2012 Impact Factor: 2.504
2012 SCImago Journal Rankings: 0.979
 
DOIhttp://dx.doi.org/10.1002/jctb.2438
 
ISI Accession Number IDWOS:000282663700007
Funding AgencyGrant Number
Hong Kong General Research FundHKU7197/08E
HKU
Funding Information:

The authors wish to thank the Hong Kong General Research Fund (HKU7197/08E) for the financial support of this study. QM Yan and L Ye wish to thank HKU for the postgraduate studentship.

 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorZhang, T
 
dc.contributor.authorYan, QM
 
dc.contributor.authorYe, L
 
dc.date.accessioned2011-09-23T05:44:24Z
 
dc.date.available2011-09-23T05:44:24Z
 
dc.date.issued2010
 
dc.description.abstractBACKGROUND: This study was conducted to investigate the feasibility and performance of nitrogen removal through the complete autotrophic nitrogen removal over nitrite (CANON) process for saline wastewater in a continuous reactor, and to characterize microorganisms in the sludge from the reactor using DNA-based techniques. RESULTS: The nitrogen removal experiment in the reactor was operated over five phases for 286 days treating a synthetic sewage of 1.2% salinity at 21-25 °C. At dissolved oxygen (DO) concentrations of 0.5-1.0 mg L -1 and in the presence of glucose, NO 2 - was accumulated, indicating the activity of ammonia-oxidizing bacteria (AOB). At DO concentration of 0.5 mg L -1 without organic substrate, the anaerobic ammonium oxidation (Anammox) process was the major pathway responsible for nitrogen removal, with a total nitrogen removal of 70% and an ammonium conversion efficiency of 96%. A maximum ammonium removal rate of 0.57 kg-N m -3 d -1 was achieved during the experimental period. The concentrations of AOB and Anammox bacteria were monitored over the operation of reactor using quantitative real-time polymerase chain reaction (qRT-PCR). CONCLUSION: In this study, autotrophic nitrogen removal process was achieved under salinity condition in a one-reactor system. An over 100 fold increase of AOB was found due to the increased supply of ammonium at the beginning, then AOB concentration decreased temporarily in correspondence with the decreased DO, and the AOB resumed their concentration at the last phase. The Anammox bacteria abundance was about 150 fold higher than that at the beginning, indicating the successful enrichment of Anammox bacteria in the reactor. © 2010 Society of Chemical Industry.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationJournal Of Chemical Technology And Biotechnology, 2010, v. 85 n. 10, p. 1340-1345 [How to Cite?]
DOI: http://dx.doi.org/10.1002/jctb.2438
 
dc.identifier.citeulike7870915
 
dc.identifier.doihttp://dx.doi.org/10.1002/jctb.2438
 
dc.identifier.epage1345
 
dc.identifier.hkuros192694
 
dc.identifier.isiWOS:000282663700007
Funding AgencyGrant Number
Hong Kong General Research FundHKU7197/08E
HKU
Funding Information:

The authors wish to thank the Hong Kong General Research Fund (HKU7197/08E) for the financial support of this study. QM Yan and L Ye wish to thank HKU for the postgraduate studentship.

 
dc.identifier.issn0268-2575
2012 Impact Factor: 2.504
2012 SCImago Journal Rankings: 0.979
 
dc.identifier.issue10
 
dc.identifier.scopuseid_2-s2.0-77956657773
 
dc.identifier.spage1340
 
dc.identifier.urihttp://hdl.handle.net/10722/139029
 
dc.identifier.volume85
 
dc.languageeng
 
dc.publisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/2517
 
dc.publisher.placeUnited Kingdom
 
dc.relation.ispartofJournal of Chemical Technology and Biotechnology
 
dc.relation.referencesReferences in Scopus
 
dc.rightsJournal of Chemical Technology and Biotechnology. Copyright © John Wiley & Sons Ltd.
 
dc.subjectAnammox bacteria
 
dc.subjectAOB
 
dc.subjectNitrogen removal
 
dc.titleAutotrophic biological nitrogen removal from saline wastewater under low DO
 
dc.typeArticle
 
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<description.abstract>BACKGROUND: This study was conducted to investigate the feasibility and performance of nitrogen removal through the complete autotrophic nitrogen removal over nitrite (CANON) process for saline wastewater in a continuous reactor, and to characterize microorganisms in the sludge from the reactor using DNA-based techniques. RESULTS: The nitrogen removal experiment in the reactor was operated over five phases for 286 days treating a synthetic sewage of 1.2% salinity at 21-25 &#176;C. At dissolved oxygen (DO) concentrations of 0.5-1.0 mg L -1 and in the presence of glucose, NO 2 - was accumulated, indicating the activity of ammonia-oxidizing bacteria (AOB). At DO concentration of 0.5 mg L -1 without organic substrate, the anaerobic ammonium oxidation (Anammox) process was the major pathway responsible for nitrogen removal, with a total nitrogen removal of 70% and an ammonium conversion efficiency of 96%. A maximum ammonium removal rate of 0.57 kg-N m -3 d -1 was achieved during the experimental period. The concentrations of AOB and Anammox bacteria were monitored over the operation of reactor using quantitative real-time polymerase chain reaction (qRT-PCR). CONCLUSION: In this study, autotrophic nitrogen removal process was achieved under salinity condition in a one-reactor system. An over 100 fold increase of AOB was found due to the increased supply of ammonium at the beginning, then AOB concentration decreased temporarily in correspondence with the decreased DO, and the AOB resumed their concentration at the last phase. The Anammox bacteria abundance was about 150 fold higher than that at the beginning, indicating the successful enrichment of Anammox bacteria in the reactor. &#169; 2010 Society of Chemical Industry.</description.abstract>
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Author Affiliations
  1. The University of Hong Kong