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Article: Acidification of lactose in wastewater

TitleAcidification of lactose in wastewater
Authors
Issue Date2001
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.html
Citation
Journal Of Environmental Engineering, 2001, v. 127 n. 9, p. 825-831 How to Cite?
AbstractAcidification of lactose in wastewater was conducted in four series of experiments in an upflow reactor to investigate individual effects of hydraulic retention time (HRT) (2-24 h), lactose concentration in wastewater (2-30 g COD/L), pH (4.0-6.5), and temperature (20°-60°C). Optimum acidification was found at pH 5.5 and 55°C. Acidification increased with HRT, but with the decrease of lactose concentration in wastewater. Degradation of lactose followed the Michaelis-Menten model with a maximum specific degradation rate of 4.39 g/g VSS · day and a half-rate concentration of 1.97 g/L. Production of volatile fatty acids, in general, favored lower lactose concentrations and higher pH, but was not sensitive to HRT and temperature. Distribution of individual volatile fatty acids/alcohols was dependent on lactose concentration, pH, and temperature, but less sensitive to HRT. Under most conditions acetate, propionate, and ethanol were the predominant products. Biogas produced under all test conditions was composed of mostly hydrogen and carbon dioxide, but no detectable methane. Sludge yield was estimated as 0.230 ± 0.021 g VSS/g COD.
Persistent Identifierhttp://hdl.handle.net/10722/71282
ISSN
2015 Impact Factor: 1.125
2015 SCImago Journal Rankings: 0.462
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorFang, HHPen_HK
dc.contributor.authorYu, HQen_HK
dc.date.accessioned2010-09-06T06:30:34Z-
dc.date.available2010-09-06T06:30:34Z-
dc.date.issued2001en_HK
dc.identifier.citationJournal Of Environmental Engineering, 2001, v. 127 n. 9, p. 825-831en_HK
dc.identifier.issn0733-9372en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71282-
dc.description.abstractAcidification of lactose in wastewater was conducted in four series of experiments in an upflow reactor to investigate individual effects of hydraulic retention time (HRT) (2-24 h), lactose concentration in wastewater (2-30 g COD/L), pH (4.0-6.5), and temperature (20°-60°C). Optimum acidification was found at pH 5.5 and 55°C. Acidification increased with HRT, but with the decrease of lactose concentration in wastewater. Degradation of lactose followed the Michaelis-Menten model with a maximum specific degradation rate of 4.39 g/g VSS · day and a half-rate concentration of 1.97 g/L. Production of volatile fatty acids, in general, favored lower lactose concentrations and higher pH, but was not sensitive to HRT and temperature. Distribution of individual volatile fatty acids/alcohols was dependent on lactose concentration, pH, and temperature, but less sensitive to HRT. Under most conditions acetate, propionate, and ethanol were the predominant products. Biogas produced under all test conditions was composed of mostly hydrogen and carbon dioxide, but no detectable methane. Sludge yield was estimated as 0.230 ± 0.021 g VSS/g COD.en_HK
dc.languageengen_HK
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.htmlen_HK
dc.relation.ispartofJournal of Environmental Engineeringen_HK
dc.rightsJournal of Environmental Engineering. Copyright © American Society of Civil Engineers.en_HK
dc.titleAcidification of lactose in wastewateren_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0733-9372&volume=127 &issue=9&spage=825 &epage= 831&date=2001&atitle=Acidification+of+lactose+in+wastewateren_HK
dc.identifier.emailFang, HHP:hrechef@hkucc.hku.hken_HK
dc.identifier.authorityFang, HHP=rp00115en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1061/(ASCE)0733-9372(2001)127:9(825)en_HK
dc.identifier.scopuseid_2-s2.0-0035450819en_HK
dc.identifier.hkuros67282en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035450819&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume127en_HK
dc.identifier.issue9en_HK
dc.identifier.spage825en_HK
dc.identifier.epage831en_HK
dc.identifier.isiWOS:000170511500010-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridFang, HHP=7402542625en_HK
dc.identifier.scopusauthoridYu, HQ=13008678100en_HK

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