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Article: Integrated nitrogen removal in a shell-and-tube co-immobilized cell bioreactor

TitleIntegrated nitrogen removal in a shell-and-tube co-immobilized cell bioreactor
Authors
KeywordsBiological nitrogen removal
Bioreactor
Carbon source recycling
Immobilization
Issue Date2004
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/procbio
Citation
Process Biochemistry, 2004, v. 39 n. 10, p. 1269-1273 How to Cite?
AbstractA new bioreactor (shell-and-tube co-immobilized cell bioreactor) for integrated nitrogen removal from wastewater was developed. The configuration of this bioreactor was similar to a shell-and-tube heat exchanger, and consisted of a bundle of parallel tubes made up of polyvinyl alcohol (PVA) gel, containing nitrifying and denitrifying bacteria, fixed on to the tube sheets. The tube bundle was contained in a cylindrical shell which was provided with two channels, one at each end. Ammonia nitrogen wastewater was introduced into the shell-side space surrounding the tubes. At the same time, air was pumped through an air-stone into wastewater for nitrification. Ethanol solution was pumped into one channel. It flowed through the tubes into the other channel and was withdrawn into the ethanol solution tank for recycling. An integrated nitrogen removal process was studied using this bioreactor. The nitrogen removal process could be much simplified when it was carried out in this bioreactor, because only a small amount of ethanol diffused into the wastewater from the recycling ethanol solution, and the BOD 5 value in the effluent was lower than 30 mg l -1. In addition, no accumulation of ammonia, nitrite and nitrate in the recycling ethanol solution was observed. The total inorganic nitrogen (TIN) concentration was below 3 mg l -1 after the ethanol solution was recycled in the bioreactor for a week. The ammonia oxidation rate when nitrification and denitrification occurred simultaneously in a bioreactor was about twice as fast as when only nitrification occurred (denitrification was restrained). The operational system remained stable for more then 3 months and the mechanical strength of the tubes was excellent even after 3 months of continuous operation. The existence of a short-cut of nitrogen removal was indicated, in which ammonia nitrogen was first converted into nitrite and subsequent denitrification proceeded directly from nitrite using the co-immobilized mixed culture. © 2003 Published by Elsevier Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/71165
ISSN
2004 Impact Factor: 1.375
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCao, GMen_HK
dc.contributor.authorZhao, QXen_HK
dc.contributor.authorSun, XBen_HK
dc.contributor.authorZhang, Ten_HK
dc.date.accessioned2010-09-06T06:29:30Z-
dc.date.available2010-09-06T06:29:30Z-
dc.date.issued2004en_HK
dc.identifier.citationProcess Biochemistry, 2004, v. 39 n. 10, p. 1269-1273en_HK
dc.identifier.issn0032-9592en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71165-
dc.description.abstractA new bioreactor (shell-and-tube co-immobilized cell bioreactor) for integrated nitrogen removal from wastewater was developed. The configuration of this bioreactor was similar to a shell-and-tube heat exchanger, and consisted of a bundle of parallel tubes made up of polyvinyl alcohol (PVA) gel, containing nitrifying and denitrifying bacteria, fixed on to the tube sheets. The tube bundle was contained in a cylindrical shell which was provided with two channels, one at each end. Ammonia nitrogen wastewater was introduced into the shell-side space surrounding the tubes. At the same time, air was pumped through an air-stone into wastewater for nitrification. Ethanol solution was pumped into one channel. It flowed through the tubes into the other channel and was withdrawn into the ethanol solution tank for recycling. An integrated nitrogen removal process was studied using this bioreactor. The nitrogen removal process could be much simplified when it was carried out in this bioreactor, because only a small amount of ethanol diffused into the wastewater from the recycling ethanol solution, and the BOD 5 value in the effluent was lower than 30 mg l -1. In addition, no accumulation of ammonia, nitrite and nitrate in the recycling ethanol solution was observed. The total inorganic nitrogen (TIN) concentration was below 3 mg l -1 after the ethanol solution was recycled in the bioreactor for a week. The ammonia oxidation rate when nitrification and denitrification occurred simultaneously in a bioreactor was about twice as fast as when only nitrification occurred (denitrification was restrained). The operational system remained stable for more then 3 months and the mechanical strength of the tubes was excellent even after 3 months of continuous operation. The existence of a short-cut of nitrogen removal was indicated, in which ammonia nitrogen was first converted into nitrite and subsequent denitrification proceeded directly from nitrite using the co-immobilized mixed culture. © 2003 Published by Elsevier Ltd.en_HK
dc.languageengen_HK
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/procbioen_HK
dc.relation.ispartofProcess Biochemistryen_HK
dc.rightsProcess Biochemistry. Copyright © Elsevier Ltd.en_HK
dc.subjectBiological nitrogen removalen_HK
dc.subjectBioreactoren_HK
dc.subjectCarbon source recyclingen_HK
dc.subjectImmobilizationen_HK
dc.titleIntegrated nitrogen removal in a shell-and-tube co-immobilized cell bioreactoren_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1359-5113&volume=39&spage=1269&epage=1273&date=2004&atitle=Integrated+nitrogen+removal+in+a+shell-and-tube+co-immobilized+cell+bioreactoren_HK
dc.identifier.emailZhang, T:zhangt@hkucc.hku.hken_HK
dc.identifier.authorityZhang, T=rp00211en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0032-9592(03)00256-5en_HK
dc.identifier.scopuseid_2-s2.0-2542597702en_HK
dc.identifier.hkuros95909en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-2542597702&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume39en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1269en_HK
dc.identifier.epage1273en_HK
dc.identifier.isiWOS:000222075000012-
dc.identifier.scopusauthoridCao, GM=7401710002en_HK
dc.identifier.scopusauthoridZhao, QX=7402764425en_HK
dc.identifier.scopusauthoridSun, XB=7405626508en_HK
dc.identifier.scopusauthoridZhang, T=24470677400en_HK

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