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Article: Use of limestone for pH control in autotrophic denitrification: Continuous flow experiments in pilot-scale packed bed reactors

TitleUse of limestone for pH control in autotrophic denitrification: Continuous flow experiments in pilot-scale packed bed reactors
Authors
Issue Date2002
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jbiotec
Citation
Journal Of Biotechnology, 2002, v. 99 n. 2, p. 161-171 How to Cite?
AbstractThe sulfur-utilizing autotrophic denitrification process consumes about 4 g alkalinity (as CaCO3) per g NO3-N reduced resulting in a decrease of pH. Using limestone as an alkalinity source to control the pH, autotrophic denitrification of synthetic wastewater with varying alkalinity to NO3-N ratios was evaluated in pilot-scale packed bed reactors operating in the upflow mode, which contained limestone and sulfur granules in different volumetric ratios. The results demonstrated that limestone supplies effective buffering capacity, if the initial alkalinity of the wastewater is insufficient for complete denitrification. The alkalinity supplied by limestone is a function of hydraulic retention time and the pH, which in turn depends on the extent of biological denitrification and the initial alkalinity to NO3-N ratio in the wastewater. The dissolution rate of limestone is inversely proportional to pH for pH values lower than 7.1. It was found that the ratio of influent alkalinity to theoretically required alkalinity in the wastewater should not be lower than 0.5 in order to prevent a decrease in nitrate removal performance. Based on the established chemical-biological interactive relationships, a multilayer approach was proposed to determine the optimum sulfur:limestone ratio for nitrate removal under steady state conditions, taking into account the characteristics of the influent wastewater. © 2002 Elsevier Science B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/71303
ISSN
2015 Impact Factor: 2.667
2015 SCImago Journal Rankings: 1.064
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKoenig, Aen_HK
dc.contributor.authorLiu, LHen_HK
dc.date.accessioned2010-09-06T06:30:46Z-
dc.date.available2010-09-06T06:30:46Z-
dc.date.issued2002en_HK
dc.identifier.citationJournal Of Biotechnology, 2002, v. 99 n. 2, p. 161-171en_HK
dc.identifier.issn0168-1656en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71303-
dc.description.abstractThe sulfur-utilizing autotrophic denitrification process consumes about 4 g alkalinity (as CaCO3) per g NO3-N reduced resulting in a decrease of pH. Using limestone as an alkalinity source to control the pH, autotrophic denitrification of synthetic wastewater with varying alkalinity to NO3-N ratios was evaluated in pilot-scale packed bed reactors operating in the upflow mode, which contained limestone and sulfur granules in different volumetric ratios. The results demonstrated that limestone supplies effective buffering capacity, if the initial alkalinity of the wastewater is insufficient for complete denitrification. The alkalinity supplied by limestone is a function of hydraulic retention time and the pH, which in turn depends on the extent of biological denitrification and the initial alkalinity to NO3-N ratio in the wastewater. The dissolution rate of limestone is inversely proportional to pH for pH values lower than 7.1. It was found that the ratio of influent alkalinity to theoretically required alkalinity in the wastewater should not be lower than 0.5 in order to prevent a decrease in nitrate removal performance. Based on the established chemical-biological interactive relationships, a multilayer approach was proposed to determine the optimum sulfur:limestone ratio for nitrate removal under steady state conditions, taking into account the characteristics of the influent wastewater. © 2002 Elsevier Science B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jbiotecen_HK
dc.relation.ispartofJournal of Biotechnologyen_HK
dc.rightsJournal of Biotechnology. Copyright © Elsevier BV.en_HK
dc.subject.meshBioreactorsen_HK
dc.subject.meshCalcium Carbonate - metabolismen_HK
dc.subject.meshHydrogen-Ion Concentrationen_HK
dc.subject.meshModels, Chemicalen_HK
dc.subject.meshNitrates - metabolismen_HK
dc.subject.meshPilot Projectsen_HK
dc.subject.meshSensitivity and Specificityen_HK
dc.subject.meshSulfur - metabolismen_HK
dc.subject.meshThiobacillus - metabolismen_HK
dc.subject.meshWaste Disposal, Fluid - methodsen_HK
dc.subject.meshWater Purification - methodsen_HK
dc.titleUse of limestone for pH control in autotrophic denitrification: Continuous flow experiments in pilot-scale packed bed reactorsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0168-1656&volume=99&spage=161&epage=171&date=2002&atitle=Use+of+limestone+for+pH+control+in+autotrophic+denitrification:+Continuous+flow+experiments+in+pilot-scale+packed+bed+reactorsen_HK
dc.identifier.emailKoenig, A:kalbert@hkucc.hku.hken_HK
dc.identifier.authorityKoenig, A=rp00125en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0168-1656(02)00183-9en_HK
dc.identifier.pmid12270603-
dc.identifier.scopuseid_2-s2.0-0037164170en_HK
dc.identifier.hkuros75936en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037164170&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume99en_HK
dc.identifier.issue2en_HK
dc.identifier.spage161en_HK
dc.identifier.epage171en_HK
dc.identifier.isiWOS:000178454000006-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridKoenig, A=7103178143en_HK
dc.identifier.scopusauthoridLiu, LH=23980547100en_HK

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