| 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 Publication | CHEMICAL ENGINEERING JOURNAL
 |
| ISSN | 1385-8947 |
| Volume | 152Issue:1Pages:88-94 |
| Abstract | 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.; 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. |
| Subtype | Article |
| Keyword | Molasses 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 Area | Engineering, Chemical |
| DOI | 10.1016/j.cej.2009.03.036 |
| WOS Headings | Science & Technology ; Technology |
| Funding Organization | 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 ; National Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Environmental ; Engineering, Chemical |
| WOS ID | WOS:000274348400012 |
| WOS Keyword | DISSOLVED ORGANIC-MATTER ; DECOLORIZATION ; FLOCCULATION ; OXIDATION ; FERMENTATION ; PH |
| Funding Organization | 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 ; National Natural Science Foundation of China [40830748]; China Postdoctoral Science Foundation [20080440976]; Ministry of Environmental Protection of China |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ihb.ac.cn/handle/152342/7436 |
| Collection | 期刊论文 |
| Corresponding Author | Wang, YX, China Univ Geosci, MOE Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China |
| Affiliation | 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 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,&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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