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Article: Degradation of phenol in an upflow anaerobic sludge blanket (UASB) reactor at ambient temperature

TitleDegradation of phenol in an upflow anaerobic sludge blanket (UASB) reactor at ambient temperature
Authors
Issue Date2004
PublisherI O S Press. The Journal's web site is located at http://www.iospress.nl/html/10010742.php
Citation
Journal Of Environmental Sciences, 2004, v. 16 n. 3, p. 525-528 How to Cite?
AbstractA synthetic wastewater containing phenol as sole substrate was treated in a 2.8 L upflow anaerobic sludge blanket(UASB) reactor at ambient temperature. The operation conditions and phenol removal efficiency were discussed, microbial population in the UASB sludge was identified based on DNA cloning, and pathway of anaerobic phenol degradation was proposed. Phenol in wastewater was degraded in an UASB reactor at loading rate up to 18 gCOD/(L·d), with a 1:1 recycle ratio, at 26 ± 1°C, pH 7.0-7.5. An UASB reactor was able to remove 99% of phenol up to 1226 mg/L in wastewater with 24 h of hydraulic retention time(HRT). For HRT below 24 h, phenol degradation efficiency decreased with HRT, from 95.4% at 16 h to 93.8% at 12 h. It further deteriorated to 88.5% when HRT reached 8 h. When the concentration of influent phenol of the reactor was 1260 mg/L(corresponding COD 3000 mg/L), with the HRT decreasing(from 40 h to 4 h. corresponding COD loading increasing), the biomass yields tended to increase from 0.265 to 3.08 g/(L·d). While at 12 h of HRT, the biomass yield was lower. When HRT was 12 h, the methane yield was 0.308 L/(gCOD removed), which was the highest. Throughout the study, phenol was the sole organic substrate. The effluent contained only residual phenol without any detectable intermediates, such as benzoate, 4-hydrobenzoate or volatile fatty acids (VFAs). Based on DNA cloning analysis, the sludge was composed of five groups of microorganisms. Desulfotomaculum and Clostridium were likely responsible for the conversion of phenol to benzoate, which was further degraded by Syntrophus to acetate and H2/CO2. Methanogens lastly converted acetate and H2/CO2 to methane. The role of epsilon-Proteobacteria was, however, unsure.
Persistent Identifierhttp://hdl.handle.net/10722/71252
ISSN
2015 Impact Factor: 2.208
2015 SCImago Journal Rankings: 0.832
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKe, SZen_HK
dc.contributor.authorShi, Zen_HK
dc.contributor.authorZhang, Ten_HK
dc.contributor.authorFang, HHPen_HK
dc.date.accessioned2010-09-06T06:30:18Z-
dc.date.available2010-09-06T06:30:18Z-
dc.date.issued2004en_HK
dc.identifier.citationJournal Of Environmental Sciences, 2004, v. 16 n. 3, p. 525-528en_HK
dc.identifier.issn1001-0742en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71252-
dc.description.abstractA synthetic wastewater containing phenol as sole substrate was treated in a 2.8 L upflow anaerobic sludge blanket(UASB) reactor at ambient temperature. The operation conditions and phenol removal efficiency were discussed, microbial population in the UASB sludge was identified based on DNA cloning, and pathway of anaerobic phenol degradation was proposed. Phenol in wastewater was degraded in an UASB reactor at loading rate up to 18 gCOD/(L·d), with a 1:1 recycle ratio, at 26 ± 1°C, pH 7.0-7.5. An UASB reactor was able to remove 99% of phenol up to 1226 mg/L in wastewater with 24 h of hydraulic retention time(HRT). For HRT below 24 h, phenol degradation efficiency decreased with HRT, from 95.4% at 16 h to 93.8% at 12 h. It further deteriorated to 88.5% when HRT reached 8 h. When the concentration of influent phenol of the reactor was 1260 mg/L(corresponding COD 3000 mg/L), with the HRT decreasing(from 40 h to 4 h. corresponding COD loading increasing), the biomass yields tended to increase from 0.265 to 3.08 g/(L·d). While at 12 h of HRT, the biomass yield was lower. When HRT was 12 h, the methane yield was 0.308 L/(gCOD removed), which was the highest. Throughout the study, phenol was the sole organic substrate. The effluent contained only residual phenol without any detectable intermediates, such as benzoate, 4-hydrobenzoate or volatile fatty acids (VFAs). Based on DNA cloning analysis, the sludge was composed of five groups of microorganisms. Desulfotomaculum and Clostridium were likely responsible for the conversion of phenol to benzoate, which was further degraded by Syntrophus to acetate and H2/CO2. Methanogens lastly converted acetate and H2/CO2 to methane. The role of epsilon-Proteobacteria was, however, unsure.en_HK
dc.languageengen_HK
dc.publisherI O S Press. The Journal's web site is located at http://www.iospress.nl/html/10010742.phpen_HK
dc.relation.ispartofJournal of Environmental Sciencesen_HK
dc.subject.meshBacteria, Anaerobic - physiologyen_HK
dc.subject.meshBiomassen_HK
dc.subject.meshBioreactorsen_HK
dc.subject.meshDisinfectants - metabolismen_HK
dc.subject.meshPhenol - metabolismen_HK
dc.subject.meshTemperatureen_HK
dc.subject.meshWaste Disposal, Fluid - methodsen_HK
dc.subject.meshWater Movementsen_HK
dc.titleDegradation of phenol in an upflow anaerobic sludge blanket (UASB) reactor at ambient temperatureen_HK
dc.typeArticleen_HK
dc.identifier.emailZhang, T:zhangt@hkucc.hku.hken_HK
dc.identifier.emailFang, HHP:hrechef@hkucc.hku.hken_HK
dc.identifier.authorityZhang, T=rp00211en_HK
dc.identifier.authorityFang, HHP=rp00115en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.pmid15272736-
dc.identifier.scopuseid_2-s2.0-2442488643en_HK
dc.identifier.hkuros104780en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-2442488643&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume16en_HK
dc.identifier.issue3en_HK
dc.identifier.spage525en_HK
dc.identifier.epage528en_HK
dc.identifier.isiWOS:000221144000036-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridKe, SZ=7007049344en_HK
dc.identifier.scopusauthoridShi, Z=7403734073en_HK
dc.identifier.scopusauthoridZhang, T=24470677400en_HK
dc.identifier.scopusauthoridFang, HHP=7402542625en_HK

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