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Article: Heterotrophs grown on the soluble microbial products (SMP) released by autotrophs are responsible for the nitrogen loss in nitrifying granular sludge

TitleHeterotrophs grown on the soluble microbial products (SMP) released by autotrophs are responsible for the nitrogen loss in nitrifying granular sludge
Authors
Issue Date2011
PublisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/71002188
Citation
Biotechnology and Bioengineering, 2011, v. 108 n. 12, p. 2844-2852 How to Cite?
AbstractIn this work, nitrogen loss in the nitrite oxidation step of the nitrification process in an aerobic-granule-based reactor was characterized with both experimental and modeling approaches. Experimental results showed that soluble microbial products (SMP) were released from the nitrite-oxidizing granules and were utilized as a carbon source by the heterotrophs for denitrification. This was verified by the fluorescence in situ hybridization (FISH) analysis. Microelectrode tests showed that oxygen diffusion limitation did result in an anoxic micro-zone in the granules and allowed sequential utilization of nitrate as an electron acceptor for heterotrophic denitrification with SMP as a carbon source. To further elucidate the nitrogen loss mechanisms, a mathematic model was formulated to describe the growth of nitrite oxidizers, the formation and consumption of SMP, the anoxic heterotrophic growth on SMP and nitrate, as well as the oxygen transfer and the substrate diffusion in the granules. The results clearly indicate that the heterotrophs grown on the SMP released by the autotrophs are responsible for the nitrogen loss in the nitrifying granules, and give us a better understanding of the aerobic granules for nitrogen removal. Biotechnol. Bioeng. 2011;108: 2844-2852. (c) 2011 Wiley Periodicals, Inc.
Persistent Identifierhttp://hdl.handle.net/10722/146862
ISSN
2015 Impact Factor: 4.243
2015 SCImago Journal Rankings: 1.633
ISI Accession Number ID
Funding AgencyGrant Number
Natural Science Foundation of China50738006
Fundamental Research Funds for the Central Universities, ChinaWK2060190007
National Synchrotron Radiation Laboratory, Hefei, China
Funding Information:

The authors wish to thank the Natural Science Foundation of China (50738006), the Fundamental Research Funds for the Central Universities (WK2060190007), China, and the National Synchrotron Radiation Laboratory, Hefei, China, for the partial support of this study.

 

DC FieldValueLanguage
dc.contributor.authorNi, BJen_US
dc.contributor.authorXie, WMen_US
dc.contributor.authorChen, YPen_US
dc.contributor.authorFang, Fen_US
dc.contributor.authorLiu, SYen_US
dc.contributor.authorRen, TTen_US
dc.contributor.authorSheng, GPen_US
dc.contributor.authorYu, HQen_US
dc.contributor.authorLiu, Gen_US
dc.contributor.authorTian, YCen_US
dc.date.accessioned2012-05-23T05:42:59Z-
dc.date.available2012-05-23T05:42:59Z-
dc.date.issued2011en_US
dc.identifier.citationBiotechnology and Bioengineering, 2011, v. 108 n. 12, p. 2844-2852en_US
dc.identifier.issn0006-3592-
dc.identifier.urihttp://hdl.handle.net/10722/146862-
dc.description.abstractIn this work, nitrogen loss in the nitrite oxidation step of the nitrification process in an aerobic-granule-based reactor was characterized with both experimental and modeling approaches. Experimental results showed that soluble microbial products (SMP) were released from the nitrite-oxidizing granules and were utilized as a carbon source by the heterotrophs for denitrification. This was verified by the fluorescence in situ hybridization (FISH) analysis. Microelectrode tests showed that oxygen diffusion limitation did result in an anoxic micro-zone in the granules and allowed sequential utilization of nitrate as an electron acceptor for heterotrophic denitrification with SMP as a carbon source. To further elucidate the nitrogen loss mechanisms, a mathematic model was formulated to describe the growth of nitrite oxidizers, the formation and consumption of SMP, the anoxic heterotrophic growth on SMP and nitrate, as well as the oxygen transfer and the substrate diffusion in the granules. The results clearly indicate that the heterotrophs grown on the SMP released by the autotrophs are responsible for the nitrogen loss in the nitrifying granules, and give us a better understanding of the aerobic granules for nitrogen removal. Biotechnol. Bioeng. 2011;108: 2844-2852. (c) 2011 Wiley Periodicals, Inc.-
dc.languageengen_US
dc.publisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/71002188en_US
dc.relation.ispartofBiotechnology and Bioengineeringen_US
dc.rightsBiotechnology and Bioengineering. Copyright © John Wiley & Sons, Inc.-
dc.subject.meshAutotrophic Processes-
dc.subject.meshBacteria - growth and development - metabolism-
dc.subject.meshHeterotrophic Processes-
dc.subject.meshMicrobial Consortia - physiology-
dc.subject.meshNitrogen - metabolism-
dc.titleHeterotrophs grown on the soluble microbial products (SMP) released by autotrophs are responsible for the nitrogen loss in nitrifying granular sludgeen_US
dc.typeArticleen_US
dc.identifier.emailRen, TT: ttren@hku.hken_US
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/bit.23247-
dc.identifier.pmid21702031-
dc.identifier.scopuseid_2-s2.0-80054011240-
dc.identifier.hkuros199732en_US
dc.identifier.volume108en_US
dc.identifier.issue12-
dc.identifier.spage2844en_US
dc.identifier.epage2852en_US
dc.identifier.isiWOS:000296703300007-
dc.publisher.placeUnited States-

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