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Article: Denitrification of phenolic wastewater by immobilized sludge

TitleDenitrification of phenolic wastewater by immobilized sludge
Authors
KeywordsCresol
Dentrification
Immobilization
Nitrate
Phenol
Issue Date1997
PublisherSelper Ltd. The Journal's web site is located at http://www.environtechnol.co.uk
Citation
Environmental Technology, 1997, v. 18 n. 8, p. 827-834 How to Cite?
AbstractWastewater containing NO3 .-N (223 mg l-1), phenol (100 mg l-1) and m-cresol (50 mg l-1) was heated at 30°C in an upflow reactor packed with polyvinyl-alcohol (PVA) beads entrapped with acclimated sludge. An additional 500 mg l-1 of sucrose was added as co-substrate, keeping the COD/NO3 .-N ratio at 4.3/1. The experiment was conducted by lowering the hydraulic retention time (HRT) stepwise from 12.2 to 0.52 hour. Results showed that nitrate was completely denitrified to less than 0.1 mg l-1 and all the phenol, m-cresol and sucrose were degraded to less than 1 mg l-1 even at the HRT of 0.52 hour. At this HRT, the degradation rates were 4.3 g·l-1·d-1 for phenol and 2.1 g·l-1·d-1 for m-cresol, and the denitrification rate was 10.1 g-NO3 .-N l-1 d-1. Throughout the experiment, there was no noticeable disintegration of PVA beads, and the total solid content in the effluent never exceeded 112 mg l-1. Each gram of NO3 .-N reduction required an average of 4.14 grams of GOD, and the average sludge yield was estimated as 0.22 g-VSS g·COD-1. Operated at a COD/NO3 .-N ratio of 5.0/1, part of the excess COD was converted to methane; whereas at 3.1/1, the excess NO3 .-N was converted to N2O. Scanning electron microscopic examination showed that bacteria were mostly populated on the immobilized beads surface due to the availability of nitrate and substrate.
Persistent Identifierhttp://hdl.handle.net/10722/71634
ISSN
2015 Impact Factor: 1.76
2015 SCImago Journal Rankings: 0.640
References

 

DC FieldValueLanguage
dc.contributor.authorFang, HHPen_HK
dc.contributor.authorZhou, GMen_HK
dc.date.accessioned2010-09-06T06:33:46Z-
dc.date.available2010-09-06T06:33:46Z-
dc.date.issued1997en_HK
dc.identifier.citationEnvironmental Technology, 1997, v. 18 n. 8, p. 827-834en_HK
dc.identifier.issn0959-3330en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71634-
dc.description.abstractWastewater containing NO3 .-N (223 mg l-1), phenol (100 mg l-1) and m-cresol (50 mg l-1) was heated at 30°C in an upflow reactor packed with polyvinyl-alcohol (PVA) beads entrapped with acclimated sludge. An additional 500 mg l-1 of sucrose was added as co-substrate, keeping the COD/NO3 .-N ratio at 4.3/1. The experiment was conducted by lowering the hydraulic retention time (HRT) stepwise from 12.2 to 0.52 hour. Results showed that nitrate was completely denitrified to less than 0.1 mg l-1 and all the phenol, m-cresol and sucrose were degraded to less than 1 mg l-1 even at the HRT of 0.52 hour. At this HRT, the degradation rates were 4.3 g·l-1·d-1 for phenol and 2.1 g·l-1·d-1 for m-cresol, and the denitrification rate was 10.1 g-NO3 .-N l-1 d-1. Throughout the experiment, there was no noticeable disintegration of PVA beads, and the total solid content in the effluent never exceeded 112 mg l-1. Each gram of NO3 .-N reduction required an average of 4.14 grams of GOD, and the average sludge yield was estimated as 0.22 g-VSS g·COD-1. Operated at a COD/NO3 .-N ratio of 5.0/1, part of the excess COD was converted to methane; whereas at 3.1/1, the excess NO3 .-N was converted to N2O. Scanning electron microscopic examination showed that bacteria were mostly populated on the immobilized beads surface due to the availability of nitrate and substrate.en_HK
dc.languageengen_HK
dc.publisherSelper Ltd. The Journal's web site is located at http://www.environtechnol.co.uken_HK
dc.relation.ispartofEnvironmental Technologyen_HK
dc.subjectCresolen_HK
dc.subjectDentrificationen_HK
dc.subjectImmobilizationen_HK
dc.subjectNitrateen_HK
dc.subjectPhenolen_HK
dc.titleDenitrification of phenolic wastewater by immobilized sludgeen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0959-3330&volume=18&spage=827 &epage= 834&date=1997&atitle=Denitrification+of+phenolic+wastewater+by+immobilized+sludgeen_HK
dc.identifier.emailFang, HHP:hrechef@hkucc.hku.hken_HK
dc.identifier.authorityFang, HHP=rp00115en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0030666757en_HK
dc.identifier.hkuros29825en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0030666757&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume18en_HK
dc.identifier.issue8en_HK
dc.identifier.spage827en_HK
dc.identifier.epage834en_HK
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridFang, HHP=7402542625en_HK
dc.identifier.scopusauthoridZhou, GM=7403686274en_HK

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