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Conference Paper: Inhibition of bioactivity of UASB biogranules by electroplating metals

TitleInhibition of bioactivity of UASB biogranules by electroplating metals
Authors
KeywordsAnaerobic
Biogranule
Inhibition
Metal
UASB
Issue Date1997
PublisherInternational Union of Pure and Applied Chemistry. The Journal's web site is located at http://www.iupac.org/publications/pac/
Citation
The 1997 International Conference on Environmental Biotechnology, Palmerston North, New Zealand, 14 September 1996. In Pure and Applied Chemistry, v. 69 n. 11, p. 2425-2429 How to Cite?
AbstractAmong the high-rate anaerobic wastewater treatment processes, the upflow anaerobic sludge blanket (UASB) reactor has attracted most commercial and research interests. In this study, the toxicity of five heavy metals commonly found in the electroplating effluent on the activity of anaerobic biogranules was investigated. Biogranules were sampled from UASB reactors treating four types of wastewaters containing, individually, acetate, propionate, starch and benzoate as the sole substrate. All reactors were operated at 37T for over six months at a loading rate of 10 g C0D-ld-l. The methanogenic activity of biogranules treating each type of wastewater decreased with the increase of metal concentration. The toxicity of each metal to the biogranules was measured by the reduction of methanogenic activity of biogranules in serum vials, as compared to the controls. Results show that, in general, acetate- and propionate-degrading biogranules exhibited higher resistance to electroplating metals than the starch- and benzoate-degrading ones. Acetate conversion is a one-step process conducted by acetotrophic methanogens alone. Propionate degradation, on the other hand, is a two-step process conducted by acetogens and methanogens; whereas, benzoate and starch degradations are multi-step processes conducted jointly by fermentative/acidogenic bacteria, acetogens and methanogens. Results of this study imply that heavy metals from electroplating effluent, in general, inhibit the bioactivities of fermentative/acidogenic bacteria more than those of methanogens and acetogens. For the latter two groups of bacteria, the toxicity of the heavy metals were in the following descending order: zinc > nickel > copper > cadmium > chromium.
Persistent Identifierhttp://hdl.handle.net/10722/47062
ISSN
2015 Impact Factor: 2.615
2015 SCImago Journal Rankings: 0.912

 

DC FieldValueLanguage
dc.contributor.authorFang, HHPen_HK
dc.date.accessioned2007-10-30T07:05:51Z-
dc.date.available2007-10-30T07:05:51Z-
dc.date.issued1997en_HK
dc.identifier.citationThe 1997 International Conference on Environmental Biotechnology, Palmerston North, New Zealand, 14 September 1996. In Pure and Applied Chemistry, v. 69 n. 11, p. 2425-2429en_HK
dc.identifier.issn0033-4545en_HK
dc.identifier.urihttp://hdl.handle.net/10722/47062-
dc.description.abstractAmong the high-rate anaerobic wastewater treatment processes, the upflow anaerobic sludge blanket (UASB) reactor has attracted most commercial and research interests. In this study, the toxicity of five heavy metals commonly found in the electroplating effluent on the activity of anaerobic biogranules was investigated. Biogranules were sampled from UASB reactors treating four types of wastewaters containing, individually, acetate, propionate, starch and benzoate as the sole substrate. All reactors were operated at 37T for over six months at a loading rate of 10 g C0D-ld-l. The methanogenic activity of biogranules treating each type of wastewater decreased with the increase of metal concentration. The toxicity of each metal to the biogranules was measured by the reduction of methanogenic activity of biogranules in serum vials, as compared to the controls. Results show that, in general, acetate- and propionate-degrading biogranules exhibited higher resistance to electroplating metals than the starch- and benzoate-degrading ones. Acetate conversion is a one-step process conducted by acetotrophic methanogens alone. Propionate degradation, on the other hand, is a two-step process conducted by acetogens and methanogens; whereas, benzoate and starch degradations are multi-step processes conducted jointly by fermentative/acidogenic bacteria, acetogens and methanogens. Results of this study imply that heavy metals from electroplating effluent, in general, inhibit the bioactivities of fermentative/acidogenic bacteria more than those of methanogens and acetogens. For the latter two groups of bacteria, the toxicity of the heavy metals were in the following descending order: zinc > nickel > copper > cadmium > chromium.en_HK
dc.format.extent427789 bytes-
dc.format.extent465031 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/pdf-
dc.languageengen_HK
dc.publisherInternational Union of Pure and Applied Chemistry. The Journal's web site is located at http://www.iupac.org/publications/pac/en_HK
dc.relation.ispartofPure and Applied Chemistry-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectAnaerobicen_HK
dc.subjectBiogranuleen_HK
dc.subjectInhibitionen_HK
dc.subjectMetalen_HK
dc.subjectUASBen_HK
dc.titleInhibition of bioactivity of UASB biogranules by electroplating metalsen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0033-4545&volume=69&issue=11&spage=2425&epage=2429&date=1997&atitle=Inhibition+of+bioactivity+of+UASB+biogranules+by+electroplating+metalsen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.hkuros29821-

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