Article: Autotrophic biological nitrogen removal from saline wastewater under low DO
| Title | Autotrophic biological nitrogen removal from saline wastewater under low DO | ||||||
|---|---|---|---|---|---|---|---|
| Authors | Zhang, T1 Yan, QM1 Ye, L1 | ||||||
| Keywords | Anammox bacteria AOB Nitrogen removal | ||||||
| Issue Date | 2010 | ||||||
| Publisher | John 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?] DOI: http://dx.doi.org/10.1002/jctb.2438 | ||||||
| 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. | ||||||
| ISSN | 0268-2575 2011 Impact Factor: 2.168 2011 SCImago Journal Rankings: 0.113 | ||||||
| DOI | http://dx.doi.org/10.1002/jctb.2438 | ||||||
| ISI Accession Number ID | WOS:000282663700007
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 | References in Scopus |
| dc.contributor.author | Zhang, T | ||||||
|---|---|---|---|---|---|---|---|
| dc.contributor.author | Yan, QM | ||||||
| dc.contributor.author | Ye, L | ||||||
| dc.date.accessioned | 2011-09-23T05:44:24Z | ||||||
| dc.date.available | 2011-09-23T05:44:24Z | ||||||
| dc.date.issued | 2010 | ||||||
| dc.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 °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.nature | Link_to_subscribed_fulltext | ||||||
| dc.identifier.citation | Journal 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.citeulike | 7870915 | ||||||
| dc.identifier.doi | http://dx.doi.org/10.1002/jctb.2438 | ||||||
| dc.identifier.epage | 1345 | ||||||
| dc.identifier.hkuros | 192694 | ||||||
| dc.identifier.isi | WOS:000282663700007
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.issn | 0268-2575 2011 Impact Factor: 2.168 2011 SCImago Journal Rankings: 0.113 | ||||||
| dc.identifier.issue | 10 | ||||||
| dc.identifier.scopus | eid_2-s2.0-77956657773 | ||||||
| dc.identifier.spage | 1340 | ||||||
| dc.identifier.uri | http://hdl.handle.net/10722/139029 | ||||||
| dc.identifier.volume | 85 | ||||||
| dc.language | eng | ||||||
| dc.publisher | John Wiley & Sons Ltd. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/2517 | ||||||
| dc.publisher.place | United Kingdom | ||||||
| dc.relation.ispartof | Journal of Chemical Technology and Biotechnology | ||||||
| dc.relation.references | References in Scopus | ||||||
| dc.rights | Journal of Chemical Technology and Biotechnology. Copyright © John Wiley & Sons Ltd. | ||||||
| dc.subject | Anammox bacteria | ||||||
| dc.subject | AOB | ||||||
| dc.subject | Nitrogen removal | ||||||
| dc.title | Autotrophic biological nitrogen removal from saline wastewater under low DO | ||||||
| dc.type | Article |
Author Affiliations
- The University of Hong Kong