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Article: Landfill leachate treatment with combined UASB and fenton coagulation

TitleLandfill leachate treatment with combined UASB and fenton coagulation
Authors
KeywordsCoagulation
Fenton reagent
Leachate
UASB
Issue Date2000
PublisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/10934529.asp
Citation
Journal Of Environmental Science And Health - Part A Toxic/Hazardous Substances And Environmental Engineering, 2000, v. 35 n. 10, p. 1981-1988 How to Cite?
AbstractA two-stage process was developed for the treatment of landfill leachate in Hong Kong. The leachate contained 15700 mg/L of chemical oxygen demand (COD) and 2300 mg/L of anunonia-nitrogen (NH3-N). In the first stage, it was treated in a UASB (upflow anaerobic sludge blanket) reactor at 37 °C. The process removed 89%-91% COD on average within a 6.6 days hydraulic retention period. The UASB effluent, containing 1500 mg/L COD, was then treated in the second stage using a Fenton coagulation process with H2O2 and excess Fe2+. In this process, organic substances were oxidized and precipitated through the Fenton reaction and coagulation. 70% COD of the UASB effluent was further removed. The optimal parameters of the Fenton coagulation process were determined as an initial pH between 4 and 6, mixing for 5-10 min, a Fe2+ concentration of 300 mg/L, and a H2O2 concentration of 200 mg/L. The final effluent contained a 447 mg/L COD, which was acceptable sewer system level according to the present Hong Kong regulations. | A two-stage process was developed for the treatment of landfill leachate in Hong Kong. The leachate contained 15700 mg/L of chemical oxygen demand (COD) and 2300 mg/L of ammonia-nitrogen (NH3-N). In the first stage, it was treated in a UASB (upflow anaerobic sludge blanket) reactor at 37°C. The process removed 89%-91% COD on average within a 6.6 days hydraulic retention period. The UASB effluent, containing 1500 mg/L COD, was then treated in the second stage using a Fenton coagulation process with H2O2 and excess Fe2+. In this process, organic substances were oxidized and precipitated through the Fenton reaction and coagulation. 70% COD of the UASB effluent was further removed. The optimal parameters of the Fenton coagulation process were determined as an initial pH between 4 and 6, mixing for 5-10 min, a Fe2+ concentration of 300 mg/L, and a H2O2 concentration of 200 mg/L. The final effluent contained a 447 mg/L COD, which was acceptable sewer system level according to the present Hong Kong regulations. | The development of a two-stage process for treating landfill leachate is detailed, involving initial treatment using an upflow anaerobic sludge blanket (UASB) reactor, followed by effluent treatment by Fenton coagulation. Results are then presented from an application of the treatment scheme in which the extent of organic removal was quantified. The results show that the COD removal efficiency of the UASB reactor was maintained at 89-91% at a hydraulic retention time of 6.6 d. The optimal pH for Fenton coagulation ranged 4-6, and TOC removal efficiency was enhanced with an increasing divalent iron dose up to 300 mg/l. The optimal hydrogen peroxide dose was 200 mg/l. Using these optimal values, a final UASB effluent COD removal of 70% was achieved. (from Tsinghua Univ/et al First Natl Conf on Environ Simulation and Pollution Control, Beijing, China (Nov 4-5, 99)).
Persistent Identifierhttp://hdl.handle.net/10722/70602
ISSN
2015 Impact Factor: 1.276
2015 SCImago Journal Rankings: 0.526
References

 

DC FieldValueLanguage
dc.contributor.authorWang, Pen_HK
dc.contributor.authorLau, IWCen_HK
dc.contributor.authorFang, HHPen_HK
dc.contributor.authorZhou, Den_HK
dc.date.accessioned2010-09-06T06:24:27Z-
dc.date.available2010-09-06T06:24:27Z-
dc.date.issued2000en_HK
dc.identifier.citationJournal Of Environmental Science And Health - Part A Toxic/Hazardous Substances And Environmental Engineering, 2000, v. 35 n. 10, p. 1981-1988en_HK
dc.identifier.issn1093-4529en_HK
dc.identifier.urihttp://hdl.handle.net/10722/70602-
dc.description.abstractA two-stage process was developed for the treatment of landfill leachate in Hong Kong. The leachate contained 15700 mg/L of chemical oxygen demand (COD) and 2300 mg/L of anunonia-nitrogen (NH3-N). In the first stage, it was treated in a UASB (upflow anaerobic sludge blanket) reactor at 37 °C. The process removed 89%-91% COD on average within a 6.6 days hydraulic retention period. The UASB effluent, containing 1500 mg/L COD, was then treated in the second stage using a Fenton coagulation process with H2O2 and excess Fe2+. In this process, organic substances were oxidized and precipitated through the Fenton reaction and coagulation. 70% COD of the UASB effluent was further removed. The optimal parameters of the Fenton coagulation process were determined as an initial pH between 4 and 6, mixing for 5-10 min, a Fe2+ concentration of 300 mg/L, and a H2O2 concentration of 200 mg/L. The final effluent contained a 447 mg/L COD, which was acceptable sewer system level according to the present Hong Kong regulations. | A two-stage process was developed for the treatment of landfill leachate in Hong Kong. The leachate contained 15700 mg/L of chemical oxygen demand (COD) and 2300 mg/L of ammonia-nitrogen (NH3-N). In the first stage, it was treated in a UASB (upflow anaerobic sludge blanket) reactor at 37°C. The process removed 89%-91% COD on average within a 6.6 days hydraulic retention period. The UASB effluent, containing 1500 mg/L COD, was then treated in the second stage using a Fenton coagulation process with H2O2 and excess Fe2+. In this process, organic substances were oxidized and precipitated through the Fenton reaction and coagulation. 70% COD of the UASB effluent was further removed. The optimal parameters of the Fenton coagulation process were determined as an initial pH between 4 and 6, mixing for 5-10 min, a Fe2+ concentration of 300 mg/L, and a H2O2 concentration of 200 mg/L. The final effluent contained a 447 mg/L COD, which was acceptable sewer system level according to the present Hong Kong regulations. | The development of a two-stage process for treating landfill leachate is detailed, involving initial treatment using an upflow anaerobic sludge blanket (UASB) reactor, followed by effluent treatment by Fenton coagulation. Results are then presented from an application of the treatment scheme in which the extent of organic removal was quantified. The results show that the COD removal efficiency of the UASB reactor was maintained at 89-91% at a hydraulic retention time of 6.6 d. The optimal pH for Fenton coagulation ranged 4-6, and TOC removal efficiency was enhanced with an increasing divalent iron dose up to 300 mg/l. The optimal hydrogen peroxide dose was 200 mg/l. Using these optimal values, a final UASB effluent COD removal of 70% was achieved. (from Tsinghua Univ/et al First Natl Conf on Environ Simulation and Pollution Control, Beijing, China (Nov 4-5, 99)).en_HK
dc.languageengen_HK
dc.publisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/10934529.aspen_HK
dc.relation.ispartofJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineeringen_HK
dc.subjectCoagulationen_HK
dc.subjectFenton reagenten_HK
dc.subjectLeachateen_HK
dc.subjectUASBen_HK
dc.titleLandfill leachate treatment with combined UASB and fenton coagulationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1093-4529&volume=35 &issue=10&spage=1981 &epage= 1988&date=2000&atitle=Landfill+Leachate+Treatment+with+Combined+UASB+and+Fenton+Coagulationen_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-s2.0-0034324489en_HK
dc.identifier.hkuros60266en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0034324489&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume35en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1981en_HK
dc.identifier.epage1988en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridWang, P=36038733700en_HK
dc.identifier.scopusauthoridLau, IWC=7006768100en_HK
dc.identifier.scopusauthoridFang, HHP=7402542625en_HK
dc.identifier.scopusauthoridZhou, D=55230381600en_HK

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