Coagulation removal of melanoidins from biologically treated molasses wastewater using ferric chloride

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	Coagulation removal of melanoidins from biologically treated molasses wastewater using ferric chloride
	Liang, Zhen 1,2,3; Wang, Yanxin 1,2; Zhou, Yu 1,2; Liu, Hui 1,2
刊名	CHEMICAL ENGINEERING JOURNAL
	2009-10-01
卷号	152 期号:1 页码:88-94
关键词	Molasses wastewater Ferric chloride Coagulation performance Molecular weight Floc size distribution Mechanism
ISSN号	1385-8947
通讯作者	Wang, YX, China Univ Geosci, MOE Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
中文摘要	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.
英文摘要	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.
学科主题	Engineering, Chemical
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	DISSOLVED ORGANIC-MATTER ; DECOLORIZATION ; FLOCCULATION ; OXIDATION ; FERMENTATION ; PH
收录类别	SCI
资助信息	National Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China
语种	英语
WOS记录号	WOS:000274348400012
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/7436]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文
作者单位	1.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
推荐引用方式 GB/T 7714	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.(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.