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Article: Production of volatile fatty acids and alcohols from dairy wastewater under thermophilic conditions

TitleProduction of volatile fatty acids and alcohols from dairy wastewater under thermophilic conditions
Authors
KeywordsAcidogenesis
Anaerobic
Dairy Wastewater
Thermophilic
Issue Date2001
PublisherAmerican Society of Agricultural and Biological Engineers. The Journal's web site is located at http://www.asabe.org/
Citation
Transactions of the American Society Of Agricultural Engineers, 2001, v. 44 n. 5, p. 1357-1361 How to Cite?
AbstractThe influence of substrate strength on thermophilic anaerobic acidogenesis of a simulated dairy-processing wastewater was investigated. Six series of experimental runs at chemical oxygen demand (COD) of 2, 4, 8, 12, 20, and 30 g/L were conducted at 55 ° C. Carbohydrate was readily degraded in all the runs, while the conversions of protein and lipid decreased when substrate concentration increased. The degree of acidification also decreased when the substrate COD increased, from 61.4% at 2 g-COD/L to 31.3% at 30 g-COD/L. The predominant acidogenic products were acetate, propionate, butyrate, and ethanol, while i-butyrate, i-valerate, valerate, caproate, and methanol were present in the effluents in lesser quantities. Propanol and butanol were found at high substrate concentrations. The metabolic pathways were significantly influenced by the substrate concentration. Only 4.15% to 9.52% of COD in wastewater was converted to hydrogen/methane. The net yield of acidogenic biomass was 0.25g-VSS/g-COD.
Persistent Identifierhttp://hdl.handle.net/10722/150196
ISSN
2010 Impact Factor: 0.822
References

 

DC FieldValueLanguage
dc.contributor.authorYu, HQen_US
dc.contributor.authorFang, HHPen_US
dc.date.accessioned2012-06-26T06:02:09Z-
dc.date.available2012-06-26T06:02:09Z-
dc.date.issued2001en_US
dc.identifier.citationTransactions of the American Society Of Agricultural Engineers, 2001, v. 44 n. 5, p. 1357-1361en_US
dc.identifier.issn0001-2351en_US
dc.identifier.urihttp://hdl.handle.net/10722/150196-
dc.description.abstractThe influence of substrate strength on thermophilic anaerobic acidogenesis of a simulated dairy-processing wastewater was investigated. Six series of experimental runs at chemical oxygen demand (COD) of 2, 4, 8, 12, 20, and 30 g/L were conducted at 55 ° C. Carbohydrate was readily degraded in all the runs, while the conversions of protein and lipid decreased when substrate concentration increased. The degree of acidification also decreased when the substrate COD increased, from 61.4% at 2 g-COD/L to 31.3% at 30 g-COD/L. The predominant acidogenic products were acetate, propionate, butyrate, and ethanol, while i-butyrate, i-valerate, valerate, caproate, and methanol were present in the effluents in lesser quantities. Propanol and butanol were found at high substrate concentrations. The metabolic pathways were significantly influenced by the substrate concentration. Only 4.15% to 9.52% of COD in wastewater was converted to hydrogen/methane. The net yield of acidogenic biomass was 0.25g-VSS/g-COD.en_US
dc.languageengen_US
dc.publisherAmerican Society of Agricultural and Biological Engineers. The Journal's web site is located at http://www.asabe.org/en_US
dc.relation.ispartofTransactions of the American Society of Agricultural Engineersen_US
dc.subjectAcidogenesisen_US
dc.subjectAnaerobicen_US
dc.subjectDairy Wastewateren_US
dc.subjectThermophilicen_US
dc.titleProduction of volatile fatty acids and alcohols from dairy wastewater under thermophilic conditionsen_US
dc.typeArticleen_US
dc.identifier.emailFang, HHP: hrechef@hkucc.hku.hken_US
dc.identifier.authorityFang, HHP=rp00115en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0035689903en_US
dc.identifier.hkuros67275-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035689903&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume44en_US
dc.identifier.issue5en_US
dc.identifier.spage1357en_US
dc.identifier.epage1361en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridYu, HQ=13008678100en_US
dc.identifier.scopusauthoridFang, HHP=7402542625en_US

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