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学科主题: Engineering, Chemical
题名: Coagulation removal of melanoidins from biologically treated molasses wastewater using ferric chloride
作者: Liang, Zhen1, 2, 3; Wang, Yanxin1, 2; Zhou, Yu1, 2; Liu, Hui1, 2
通讯作者: Wang, YX, China Univ Geosci, MOE Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
关键词: Molasses wastewater ; Ferric chloride ; Coagulation performance ; Molecular weight ; Floc size distribution ; Mechanism
刊名: CHEMICAL ENGINEERING JOURNAL
发表日期: 2009-10-01
DOI: 10.1016/j.cej.2009.03.036
卷: 152, 期:1, 页:88-94
收录类别: SCI
文章类型: Article
部门归属: [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
WOS标题词: Science & Technology ; Technology
资助者: National Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China
类目[WOS]: Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]: Engineering
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.
关键词[WOS]: DISSOLVED ORGANIC-MATTER ; DECOLORIZATION ; FLOCCULATION ; OXIDATION ; FERMENTATION ; PH
语种: 英语
WOS记录号: WOS:000274348400012
ISSN号: 1385-8947
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/7436
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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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

Recommended Citation:
Liang, Zhen; Wang, Yanxin; Zhou, Yu; Liu, Hui.Coagulation removal of melanoidins from biologically treated molasses wastewater using ferric chloride,CHEMICAL ENGINEERING JOURNAL,2009,152(1):88-94
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