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Article: Kinetic model of autotrophic denitrification in sulphur packed-bed reactors

TitleKinetic model of autotrophic denitrification in sulphur packed-bed reactors
Authors
Issue Date2001
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watres
Citation
Water Research, 2001, v. 35 n. 8, p. 1969-1978 How to Cite?
AbstractAutotrophic denitrification of synthetic wastewater by Thiobacillus denitrificans in upflow sulphur packed-bed reactors was studied in order to establish the process kinetics for prediction of effluent concentration. Elemental sulphur particles of different size served as energy substrate as well as the physical support for the microbial biofilm. Experiments were performed under operating conditions of (i) different flow rates at constant influent nitrate concentration; and (ii) different influent nitrate concentrations at constant flow rate. The experimental results show that autotrophic denitrification rates in upflow sulphur packed-bed reactors can be described by a half-order kinetic model for biofilms. It was found that the half-order kinetic constants of upflow packed-bed reactors are 2.94-3.60, 1.47-2.04, and 1.12-1.29mg1/2/L1/2h for sulphur particle sizes of 2.8-5.6, 5.6-11.2, and 11.2-16mm, respectively. The half-order kinetic constants could be related to the specific surface area of the reactor media by a simple equation. Successful application of the half-order reaction rate model was demonstrated for an actual wastewater (nitrified leachate). A comparison with the literature showed that the half-order reaction rate constants for autotrophic denitrification using elemental sulphur are approximately one order of magnitude lower than those of heterotrophic denitrification. An improved stoichiometric equation for autotrophic denitrification using elemental sulphur as electronic donor is also proposed. Copyright © 2001 Elsevier Science Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/150178
ISSN
2015 Impact Factor: 5.991
2015 SCImago Journal Rankings: 2.772
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKoenig, Aen_US
dc.contributor.authorLiu, LHen_US
dc.date.accessioned2012-06-26T06:02:03Z-
dc.date.available2012-06-26T06:02:03Z-
dc.date.issued2001en_US
dc.identifier.citationWater Research, 2001, v. 35 n. 8, p. 1969-1978en_US
dc.identifier.issn0043-1354en_US
dc.identifier.urihttp://hdl.handle.net/10722/150178-
dc.description.abstractAutotrophic denitrification of synthetic wastewater by Thiobacillus denitrificans in upflow sulphur packed-bed reactors was studied in order to establish the process kinetics for prediction of effluent concentration. Elemental sulphur particles of different size served as energy substrate as well as the physical support for the microbial biofilm. Experiments were performed under operating conditions of (i) different flow rates at constant influent nitrate concentration; and (ii) different influent nitrate concentrations at constant flow rate. The experimental results show that autotrophic denitrification rates in upflow sulphur packed-bed reactors can be described by a half-order kinetic model for biofilms. It was found that the half-order kinetic constants of upflow packed-bed reactors are 2.94-3.60, 1.47-2.04, and 1.12-1.29mg1/2/L1/2h for sulphur particle sizes of 2.8-5.6, 5.6-11.2, and 11.2-16mm, respectively. The half-order kinetic constants could be related to the specific surface area of the reactor media by a simple equation. Successful application of the half-order reaction rate model was demonstrated for an actual wastewater (nitrified leachate). A comparison with the literature showed that the half-order reaction rate constants for autotrophic denitrification using elemental sulphur are approximately one order of magnitude lower than those of heterotrophic denitrification. An improved stoichiometric equation for autotrophic denitrification using elemental sulphur as electronic donor is also proposed. Copyright © 2001 Elsevier Science Ltd.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watresen_US
dc.relation.ispartofWater Researchen_US
dc.subject.meshBiodegradation, Environmentalen_US
dc.subject.meshBioreactorsen_US
dc.subject.meshEquipment Designen_US
dc.subject.meshKineticsen_US
dc.subject.meshModels, Chemicalen_US
dc.subject.meshNitrates - Metabolismen_US
dc.subject.meshNitrites - Metabolismen_US
dc.subject.meshThiobacillus - Metabolismen_US
dc.subject.meshWaste Disposal, Fluid - Instrumentation - Methodsen_US
dc.subject.meshWater Purification - Instrumentation - Methodsen_US
dc.titleKinetic model of autotrophic denitrification in sulphur packed-bed reactorsen_US
dc.typeArticleen_US
dc.identifier.emailKoenig, A:kalbert@hkucc.hku.hken_US
dc.identifier.authorityKoenig, A=rp00125en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S0043-1354(00)00483-8en_US
dc.identifier.pmid11337843-
dc.identifier.scopuseid_2-s2.0-0035061698en_US
dc.identifier.hkuros60700-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035061698&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume35en_US
dc.identifier.issue8en_US
dc.identifier.spage1969en_US
dc.identifier.epage1978en_US
dc.identifier.isiWOS:000168217800014-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridKoenig, A=7103178143en_US
dc.identifier.scopusauthoridLiu, LH=23980547100en_US

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