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Article: Removal of high NO3-concentrations in saline water through autotrophic denitrification by the bacterium Thiobacillus denitrificans strain MP
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TitleRemoval of high NO3-concentrations in saline water through autotrophic denitrification by the bacterium Thiobacillus denitrificans strain MP
 
AuthorsGu, JD1
Qiu, W1
Koenig, A1
Fan, Y1
 
Issue Date2004
 
PublisherI W A Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwst
 
CitationWater Science And Technology, 2004, v. 49 n. 5-6, p. 105-112 [How to Cite?]
 
AbstractAutotrophic denitrification by Thiobacillus denitrificans MP isolated from mangrove was investigated in both a sulphur-limestone column reactor and a fermenter. More than 97.5% of the nitrate (NO3 -) in the 250 mg NO3 --N/L strong influent was removed after 14.3 hours in the column reactor. Influent NO3 - was completely depleted in the lower part of the column as the hydraulic retention time increased and a slight pH drop was also observed along the reactor column due to the exhaustion of the buffering ability of the limestone. Trace amounts of oxygen present in the lower part of the reactor column resulted in the accumulation of nitrite and subsequent inhibition of further denitrification. The species composition of the bacterial community in the higher parts of the reactor column was morphologically more diverse than in the lower part. Denitrification by T. denitrificans MP reached an optimal level when the dissolved oxygen was maintained between 1.5-2% of saturation level in the automated fermenter. The stoichiometric ratios of ΔSO4 2- produced/ΔNO3 --N removed were 6.81 and 9.32 in the reactor column and fermenter, respectively. This study suggests that efficient removal of high NO3 - concentrations in water or wastewater can be achieved using autotrophic bacteria immobilized on surfaces of sulphur granules in the column system. © IWA Publishing 2004.
 
ISSN0273-1223
2013 Impact Factor: 1.212
2013 SCImago Journal Rankings: 0.600
 
ISI Accession Number IDWOS:000221464200015
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorGu, JD
 
dc.contributor.authorQiu, W
 
dc.contributor.authorKoenig, A
 
dc.contributor.authorFan, Y
 
dc.date.accessioned2012-06-26T06:03:16Z
 
dc.date.available2012-06-26T06:03:16Z
 
dc.date.issued2004
 
dc.description.abstractAutotrophic denitrification by Thiobacillus denitrificans MP isolated from mangrove was investigated in both a sulphur-limestone column reactor and a fermenter. More than 97.5% of the nitrate (NO3 -) in the 250 mg NO3 --N/L strong influent was removed after 14.3 hours in the column reactor. Influent NO3 - was completely depleted in the lower part of the column as the hydraulic retention time increased and a slight pH drop was also observed along the reactor column due to the exhaustion of the buffering ability of the limestone. Trace amounts of oxygen present in the lower part of the reactor column resulted in the accumulation of nitrite and subsequent inhibition of further denitrification. The species composition of the bacterial community in the higher parts of the reactor column was morphologically more diverse than in the lower part. Denitrification by T. denitrificans MP reached an optimal level when the dissolved oxygen was maintained between 1.5-2% of saturation level in the automated fermenter. The stoichiometric ratios of ΔSO4 2- produced/ΔNO3 --N removed were 6.81 and 9.32 in the reactor column and fermenter, respectively. This study suggests that efficient removal of high NO3 - concentrations in water or wastewater can be achieved using autotrophic bacteria immobilized on surfaces of sulphur granules in the column system. © IWA Publishing 2004.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationWater Science And Technology, 2004, v. 49 n. 5-6, p. 105-112 [How to Cite?]
 
dc.identifier.epage112
 
dc.identifier.hkuros88322
 
dc.identifier.isiWOS:000221464200015
 
dc.identifier.issn0273-1223
2013 Impact Factor: 1.212
2013 SCImago Journal Rankings: 0.600
 
dc.identifier.issue5-6
 
dc.identifier.pmid15137413
 
dc.identifier.scopuseid_2-s2.0-2442547215
 
dc.identifier.spage105
 
dc.identifier.urihttp://hdl.handle.net/10722/150317
 
dc.identifier.volume49
 
dc.languageeng
 
dc.publisherI W A Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwst
 
dc.publisher.placeUnited Kingdom
 
dc.relation.ispartofWater Science and Technology
 
dc.relation.referencesReferences in Scopus
 
dc.subject.meshCalcium Carbonate
 
dc.subject.meshFermentation
 
dc.subject.meshNitrates - Metabolism
 
dc.subject.meshNitrogen - Isolation & Purification - Metabolism
 
dc.subject.meshOxygen
 
dc.subject.meshSulfur
 
dc.subject.meshThiobacillus - Physiology
 
dc.subject.meshWaste Disposal, Fluid - Methods
 
dc.subject.meshWater Movements
 
dc.subject.meshWater Purification - Methods
 
dc.titleRemoval of high NO3-concentrations in saline water through autotrophic denitrification by the bacterium Thiobacillus denitrificans strain MP
 
dc.typeArticle
 
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Author Affiliations
  1. The University of Hong Kong