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题名: Stoichiometric relationship in the coagulation of melanoidins-dominated molasses wastewater
作者: Liang, Zhen1, 2, 3; Wang, Yanxin1, 2; Zhou, Yu1, 2; Liu, Hui1, 2; Wu, Zhenbin3
通讯作者: Wang, Y.(yx.wang@cug.edu.cn)
关键词: Stoichiometric relationship ; Coagulation ; Ultrafiltration ; Dissolved and insoluble organic fractions ; Effluent dilution
刊名: DESALINATION
发表日期: 2010
DOI: 10.1016/j.desal.2009.06.062
卷: 250, 期:1, 页:42-48
收录类别: SCI
文章类型: Article
部门归属: (1) State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; (2) MOE Key Laboratory of Biogeology and Environmental Geology, School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China
WOS标题词: Science & Technology ; Technology ; Physical Sciences
类目[WOS]: Engineering, Chemical ; Water Resources
研究领域[WOS]: Engineering ; Water Resources
摘要: Batch experiments of coagulation/flocculation of biologically treated molasses wastewater were conducted to investigate the stoichiometric relationship between the concentration of melanoidins-dominated organics and the dosage of hydrolyzing metal salts (ferric chloride and aluminum sulfate). Wastewater samples were first fractionated by ultrafiltration. Jar tests were conducted to evaluate coagulation efficiency by measuring zeta potential, removal rates of color and chemical oxygen demand (COD). Experimental results indicate that the dissolved organic fraction accounts for predominant portion of the organic compounds present in biologically treated molasses effluent. A stoichiometric relationship exists between the concentration of melanoidins-based organic compounds and coagulant demand. When the change in solution conditions is proportional to that in organic concentration, such stoichiometric relationship still exists. On the other hand, no stoichiometry was observed between the concentration of melanoidins-dominated organics and the metal dosage when substantial changes in the nature of organics or solution conditions occur. The optimal dosage of ferric chloride expressed in terms of the ratio of metal to organic carbon removed was calculated as 0.73-0.81 g Fe3+/g COD. © 2009 Elsevier B.V. All rights reserved.
英文摘要: Batch experiments of coagulation/flocculation of biologically treated molasses wastewater were conducted to investigate the stoichiometric relationship between the concentration of melanoidins-dominated organics and the dosage of hydrolyzing metal salts (ferric chloride and aluminum sulfate). Wastewater samples were first fractionated by ultrafiltration. jar tests were conducted to evaluate coagulation efficiency by measuring zeta potential, removal rates of color and chemical oxygen demand (COD). Experimental results indicate that the dissolved organic fraction accounts for predominant portion of the organic compounds present in biologically treated molasses effluent. A stoichiometric relationship exists between the concentration of melanoidins-based organic compounds and coagulant demand. When the change in solution conditions is proportional to that in organic concentration, such stoichiometric relationship still exists. On the other hand, no stoichiometry was observed between the concentration of melanoidins-dominated organics and the metal dosage when substantial changes in the nature of organics or solution conditions occur. The optimal dosage of ferric chloride expressed in terms of the ratio of metal to organic carbon removed was calculated as 0.73-0.81 g Fe(3+)/g COD. (C) 2009 Elsevier B.V. All rights reserved.
关键词[WOS]: HUMIC SUBSTANCES ; REMOVAL ; FLOCCULATION ; FERMENTATION ; ALKALINITY ; CARBON
语种: 英语
WOS记录号: WOS:000272830600007
ISSN号: 0011-9164
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/14458
Appears in Collections:水环境工程研究中心_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.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China

Recommended Citation:
Liang, Zhen (1); Wang, Yanxin (2); Zhou, Yu (2); Liu, Hui (2); Wu, Zhenbin (1) .Stoichiometric relationship in the coagulation of melanoidins-dominated molasses wastewater,Desalination,2010,250():42-48
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