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Article: Substrate degradation of propionate-utilizing sludge

TitleSubstrate degradation of propionate-utilizing sludge
Authors
KeywordsAnaerobic
Butyrate
Degradation
Propionate
Rate
Issue Date1999
PublisherSelper Ltd. The Journal's web site is located at http://www.environtechnol.co.uk
Citation
Environmental Technology, 1999, v. 20 n. 10, p. 1103-1108 How to Cite?
AbstractA propionate-utilizing sludge was enriched in a chemostat reactor for over 90 days. Its methanogenic degradation characteristics were investigated in batch reactors using various substrates. The suspended-growth sludge degraded propionate at 0.65 mg-COD (mg-VSS d)-1, which is comparable to the rate reported in the literature for the granular sludge in a UASB reactor. The propionate-degrading rate was not affected by the presence of butyrate as a co-substrate initially; but it was lowered substantially as propionate concentration became below 100 mg l-1. The sludge was also able to degrade butyrate at 0.52 mg-COD (mg-VSS d)-1, which is about 30% of the rate reported for granular sludge in a UASB reactor treating butyrate as the sole substrate. The butyrate-degrading rate was lowered when propionate was present at high concentrations. In the interim of butyrate degradation, several higher-molecular weight acids were detected in the mixed liquor, including i-butyrate, i-valerate and caproate; valerate was, however, detected only in the batch when the P(H2) was as high as 10-1.8 atm. The presence of formate lowered the degrading rates of both propionate and butyrate.
Persistent Identifierhttp://hdl.handle.net/10722/71171
ISSN
2015 Impact Factor: 1.76
2015 SCImago Journal Rankings: 0.640
References

 

DC FieldValueLanguage
dc.contributor.authorJia, XSen_HK
dc.contributor.authorFang, HHPen_HK
dc.date.accessioned2010-09-06T06:29:34Z-
dc.date.available2010-09-06T06:29:34Z-
dc.date.issued1999en_HK
dc.identifier.citationEnvironmental Technology, 1999, v. 20 n. 10, p. 1103-1108en_HK
dc.identifier.issn0959-3330en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71171-
dc.description.abstractA propionate-utilizing sludge was enriched in a chemostat reactor for over 90 days. Its methanogenic degradation characteristics were investigated in batch reactors using various substrates. The suspended-growth sludge degraded propionate at 0.65 mg-COD (mg-VSS d)-1, which is comparable to the rate reported in the literature for the granular sludge in a UASB reactor. The propionate-degrading rate was not affected by the presence of butyrate as a co-substrate initially; but it was lowered substantially as propionate concentration became below 100 mg l-1. The sludge was also able to degrade butyrate at 0.52 mg-COD (mg-VSS d)-1, which is about 30% of the rate reported for granular sludge in a UASB reactor treating butyrate as the sole substrate. The butyrate-degrading rate was lowered when propionate was present at high concentrations. In the interim of butyrate degradation, several higher-molecular weight acids were detected in the mixed liquor, including i-butyrate, i-valerate and caproate; valerate was, however, detected only in the batch when the P(H2) was as high as 10-1.8 atm. The presence of formate lowered the degrading rates of both propionate and butyrate.en_HK
dc.languageengen_HK
dc.publisherSelper Ltd. The Journal's web site is located at http://www.environtechnol.co.uken_HK
dc.relation.ispartofEnvironmental Technologyen_HK
dc.subjectAnaerobicen_HK
dc.subjectButyrateen_HK
dc.subjectDegradationen_HK
dc.subjectPropionateen_HK
dc.subjectRateen_HK
dc.titleSubstrate degradation of propionate-utilizing sludgeen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0959-3330&volume=20&spage=1103 &epage= 1108&date=1999&atitle=Substrate+degradation+of+propionate-utilizing+sludgeen_HK
dc.identifier.emailFang, HHP:hrechef@hkucc.hku.hken_HK
dc.identifier.authorityFang, HHP=rp00115en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0032724965en_HK
dc.identifier.hkuros51639en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0032724965&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume20en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1103en_HK
dc.identifier.epage1108en_HK
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridJia, XS=7201933791en_HK
dc.identifier.scopusauthoridFang, HHP=7402542625en_HK

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