Enhancement of activated sludge dewatering performance by combined composite enzymatic lysis and chemical re-flocculation with inorganic coagulants: Kinetics of enzymatic reaction and re-flocculation morphology
文献类型：期刊论文
| 作者 | Chen, Zhan; Zhang, Weijun; Wang, Dongsheng; Ma, Teng; Bai, Runying |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2015-10-15 |
| 卷号 | 83期号:0页码:367-376 |
| 关键词 | Waste activated sludge Enzymatic treatment Extracellular polymeric substances Inorganic salt coagulants Floc morphology Sludge dewatering performance |
| 英文摘要 | The feasibility of combined process of composite enzymatic treatment and chemical flocculation with inorganic salt coagulants was investigated in this study. The evolution of extracellular polymeric substances (EPS) distribution, composition and morphological properties were analyzed to unravel the sludge conditioning mechanism. It was found that sludge filtration performance was deteriorated due to release of a large amount of biopolymers after enzymatic treatment. The change in EPS followed the pseudo-first-order kinetic equation well under enzymatic treatment. The feeding modes of enzymes had a significant influence on sludge lysis efficiency under compound enzymes treatment. Alpha amylase + protease was more effective in solubilization than other two addition modes (protease + alpha-amylase or simultaneous addition). The sludge floc re-formed and macromolecule biopolymers were effectively removed through coagulation process. At the same time, both of filtration rate and cake solid content of sludge treated with enzymes were improved with increasing dosage of coagulants, and ferric iron (FeCl3) had better performance in sludge dewaterability enhancement than polyaluminium chloride (PACl). In addition, sludge filtration property was slightly deteriorated, while the cake moisture reduction was favored at the optimal dosage of inorganic coagulants. (C) 2015 Elsevier Ltd. All rights reserved. |
| 研究领域[WOS] | Engineering, Environmental ; Environmental Sciences ; Water Resources |
| WOS记录号 | WOS:000360418000037 |
| 公开日期 | 2016-03-15 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32775]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Chen, Zhan,Zhang, Weijun,Wang, Dongsheng,et al. Enhancement of activated sludge dewatering performance by combined composite enzymatic lysis and chemical re-flocculation with inorganic coagulants: Kinetics of enzymatic reaction and re-flocculation morphology[J]. WATER RESEARCH,2015,83(0):367-376. |
| APA | Chen, Zhan,Zhang, Weijun,Wang, Dongsheng,Ma, Teng,&Bai, Runying.(2015).Enhancement of activated sludge dewatering performance by combined composite enzymatic lysis and chemical re-flocculation with inorganic coagulants: Kinetics of enzymatic reaction and re-flocculation morphology.WATER RESEARCH,83(0),367-376. |
| MLA | Chen, Zhan,et al."Enhancement of activated sludge dewatering performance by combined composite enzymatic lysis and chemical re-flocculation with inorganic coagulants: Kinetics of enzymatic reaction and re-flocculation morphology".WATER RESEARCH 83.0(2015):367-376. |
入库方式： OAI收割
来源：生态环境研究中心
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