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Article: Autotrophic biological nitrogen removal from saline wastewater under low DO

TitleAutotrophic biological nitrogen removal from saline wastewater under low DO
Authors
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
Citation
Journal Of Chemical Technology And Biotechnology, 2010, v. 85 n. 10, p. 1340-1345 How to Cite?
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 °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.
Persistent Identifierhttp://hdl.handle.net/10722/139029
ISSN
2013 Impact Factor: 2.494
2013 SCImago Journal Rankings: 1.054
ISI Accession Number ID
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.

References

 

Author Affiliations
  1. The University of Hong Kong
DC FieldValueLanguage
dc.contributor.authorZhang, Ten_HK
dc.contributor.authorYan, QMen_HK
dc.contributor.authorYe, Len_HK
dc.date.accessioned2011-09-23T05:44:24Z-
dc.date.available2011-09-23T05:44:24Z-
dc.date.issued2010en_HK
dc.identifier.citationJournal Of Chemical Technology And Biotechnology, 2010, v. 85 n. 10, p. 1340-1345en_HK
dc.identifier.issn0268-2575en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139029-
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.en_HK
dc.languageengen_US
dc.publisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/2517en_HK
dc.relation.ispartofJournal of Chemical Technology and Biotechnologyen_HK
dc.rightsJournal of Chemical Technology and Biotechnology. Copyright © John Wiley & Sons Ltd.-
dc.subjectAnammox bacteriaen_HK
dc.subjectAOBen_HK
dc.subjectNitrogen removalen_HK
dc.titleAutotrophic biological nitrogen removal from saline wastewater under low DOen_HK
dc.typeArticleen_HK
dc.identifier.emailZhang, T:zhangt@hkucc.hku.hken_HK
dc.identifier.authorityZhang, T=rp00211en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/jctb.2438en_HK
dc.identifier.scopuseid_2-s2.0-77956657773en_HK
dc.identifier.hkuros192694en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77956657773&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume85en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1340en_HK
dc.identifier.epage1345en_HK
dc.identifier.isiWOS:000282663700007-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridZhang, T=24470677400en_HK
dc.identifier.scopusauthoridYan, QM=36055876900en_HK
dc.identifier.scopusauthoridYe, L=36451639300en_HK
dc.identifier.citeulike7870915-

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