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Article: Optimization of phthalic acid batch biodegradation and the use of modified Richards model for modelling degradation

TitleOptimization of phthalic acid batch biodegradation and the use of modified Richards model for modelling degradation
Authors
KeywordsAerobic
Degradation
Gompertz model
Phthalic acid
Richards model
Issue Date2004
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/ibiod
Citation
International Biodeterioration And Biodegradation, 2004, v. 53 n. 1, p. 57-63 How to Cite?
AbstractMicrobial degradation of phthalic acid was investigated using cultures of aerobic bacteria enriched from a sewage sludge. The Gompertz function and the Richards function were modified and compared to describe the phthalic acid (PA) degradation process, and both models successfully fitted the biomass growth curve when PA was used as the sole source of growth controlling substrate. However, the modified Richards model was superior in describing the depletion curve of PA. The additional parameter, m, in the modified Richards model may be corresponding to the relative importance of the substrate consumption for maintenance. Based on the maximum degradation rates calculated using the modified Richards model, the optimal degradation conditions were determined by an orthogonal test for environmental factors including initial pH, C:N:P ratio and salt concentrations of the culture medium. More than 99% of PA at an initial concentration of 4000 mg 1 -1 was degraded within 5 days under the optimized condition: namely initial pH 6.0, C:N:P=100:5:1, and NaCl concentration 10 g l -1. Our results suggest that both substrate depletion and microbial biomass formation can be modelled and predicted using the modified Richards model and the limitation factor of phthalic acid degradation is the initial pH of the culture. © 2003 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/73127
ISSN
2015 Impact Factor: 2.429
2015 SCImago Journal Rankings: 0.919
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorFan, Yen_HK
dc.contributor.authorWang, Yen_HK
dc.contributor.authorQian, PYen_HK
dc.contributor.authorGu, JDen_HK
dc.date.accessioned2010-09-06T06:48:25Z-
dc.date.available2010-09-06T06:48:25Z-
dc.date.issued2004en_HK
dc.identifier.citationInternational Biodeterioration And Biodegradation, 2004, v. 53 n. 1, p. 57-63en_HK
dc.identifier.issn0964-8305en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73127-
dc.description.abstractMicrobial degradation of phthalic acid was investigated using cultures of aerobic bacteria enriched from a sewage sludge. The Gompertz function and the Richards function were modified and compared to describe the phthalic acid (PA) degradation process, and both models successfully fitted the biomass growth curve when PA was used as the sole source of growth controlling substrate. However, the modified Richards model was superior in describing the depletion curve of PA. The additional parameter, m, in the modified Richards model may be corresponding to the relative importance of the substrate consumption for maintenance. Based on the maximum degradation rates calculated using the modified Richards model, the optimal degradation conditions were determined by an orthogonal test for environmental factors including initial pH, C:N:P ratio and salt concentrations of the culture medium. More than 99% of PA at an initial concentration of 4000 mg 1 -1 was degraded within 5 days under the optimized condition: namely initial pH 6.0, C:N:P=100:5:1, and NaCl concentration 10 g l -1. Our results suggest that both substrate depletion and microbial biomass formation can be modelled and predicted using the modified Richards model and the limitation factor of phthalic acid degradation is the initial pH of the culture. © 2003 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/ibioden_HK
dc.relation.ispartofInternational Biodeterioration and Biodegradationen_HK
dc.subjectAerobicen_HK
dc.subjectDegradationen_HK
dc.subjectGompertz modelen_HK
dc.subjectPhthalic aciden_HK
dc.subjectRichards modelen_HK
dc.titleOptimization of phthalic acid batch biodegradation and the use of modified Richards model for modelling degradationen_HK
dc.typeArticleen_HK
dc.identifier.emailGu, JD: jdgu@hkucc.hku.hken_HK
dc.identifier.authorityGu, JD=rp00701en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ibiod.2003.10.001en_HK
dc.identifier.scopuseid_2-s2.0-0347627878en_HK
dc.identifier.hkuros86219en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0347627878&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume53en_HK
dc.identifier.issue1en_HK
dc.identifier.spage57en_HK
dc.identifier.epage63en_HK
dc.identifier.isiWOS:000187229300009-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridFan, Y=20734044200en_HK
dc.identifier.scopusauthoridWang, Y=14631253700en_HK
dc.identifier.scopusauthoridQian, PY=35240648600en_HK
dc.identifier.scopusauthoridGu, JD=7403129601en_HK

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