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Coagulation removal of melanoidins from biologically treated molasses wastewater using ferric chloride
Liang, Zhen1,2,3; Wang, Yanxin1,2; Zhou, Yu1,2; Liu, Hui1,2; Wang, YX, China Univ Geosci, MOE Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
2009-10-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume152Issue:1Pages:88-94
AbstractThe pigments (melanoidins) in molasses wastewater are refractory to conventional biological treatment. Ferric chloride was used as coagulant to remove color and chemical oxygen demand (COD) from molasses effluent. Using jar test procedure, main operating conditions such as pH and coagulant dosage were investigated. Under the optimum conditions, up to 86% and 96% of COD and color removal efficiencies were achieved. Residual turbidity in supernatant was less than 5 NTU and Fe3+ concentration was negligible because of effective destabilization and subsequent sedimentation. The results of high performance size exclusion chromatography (HPSEC) show that low molecular weight (MW) fraction of melanoidins is more reactive than high MW fraction and increase in the concentration of the lowest MW organic group is related to the capacity of charge neutralization. Aggregate size measurement reveals the size effect on the settleability of flocs formed, with larger flocs settling more rapidly. Charge neutralization and co-precipitation are proposed as predominant coagulation mechanism under the optimum conditions. (C) 2009 Elsevier B.V. All rights reserved.; The pigments (melanoidins) in molasses wastewater are refractory to conventional biological treatment. Ferric chloride was used as coagulant to remove color and chemical oxygen demand (COD) from molasses effluent. Using jar test procedure, main operating conditions such as pH and coagulant dosage were investigated. Under the optimum conditions, up to 86% and 96% of COD and color removal efficiencies were achieved. Residual turbidity in supernatant was less than 5 NTU and Fe3+ concentration was negligible because of effective destabilization and subsequent sedimentation. The results of high performance size exclusion chromatography (HPSEC) show that low molecular weight (MW) fraction of melanoidins is more reactive than high MW fraction and increase in the concentration of the lowest MW organic group is related to the capacity of charge neutralization. Aggregate size measurement reveals the size effect on the settleability of flocs formed, with larger flocs settling more rapidly. Charge neutralization and co-precipitation are proposed as predominant coagulation mechanism under the optimum conditions. (C) 2009 Elsevier B.V. All rights reserved.
SubtypeArticle
KeywordMolasses Wastewater Ferric Chloride Coagulation Performance Molecular Weight Floc Size Distribution Mechanism
Department[Liang, Zhen; Wang, Yanxin; Zhou, Yu; Liu, Hui] China Univ Geosci, MOE Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China; [Liang, Zhen; Wang, Yanxin; Zhou, Yu; Liu, Hui] China Univ Geosci, Sch Environm Studies, Wuhan 430074, Peoples R China; [Liang, Zhen] Wuhan Univ, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
Subject AreaEngineering, Chemical
DOI10.1016/j.cej.2009.03.036
WOS HeadingsScience & Technology ; Technology
Funding OrganizationNational Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China ; National Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China ; National Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China ; National Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000274348400012
WOS KeywordDISSOLVED ORGANIC-MATTER ; DECOLORIZATION ; FLOCCULATION ; OXIDATION ; FERMENTATION ; PH
Funding OrganizationNational Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China ; National Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China ; National Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China ; National Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China
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Cited Times:58[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/7436
Collection期刊论文
Corresponding AuthorWang, YX, China Univ Geosci, MOE Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
Affiliation1.China Univ Geosci, MOE Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
2.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Peoples R China
3.Wuhan Univ, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
Recommended Citation
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Liang, Zhen,Wang, Yanxin,Zhou, Yu,et al. Coagulation removal of melanoidins from biologically treated molasses wastewater using ferric chloride[J]. CHEMICAL ENGINEERING JOURNAL,2009,152(1):88-94.
APA Liang, Zhen,Wang, Yanxin,Zhou, Yu,Liu, Hui,&Wang, YX, China Univ Geosci, MOE Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China.(2009).Coagulation removal of melanoidins from biologically treated molasses wastewater using ferric chloride.CHEMICAL ENGINEERING JOURNAL,152(1),88-94.
MLA Liang, Zhen,et al."Coagulation removal of melanoidins from biologically treated molasses wastewater using ferric chloride".CHEMICAL ENGINEERING JOURNAL 152.1(2009):88-94.
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