| DOI: | 10.1016/j.watres.2018.12.035
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| Scopus记录号: | 2-s2.0-85060094083
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| 论文题名: | Rapid and efficient activated sludge treatment by electro-Fenton oxidation |
| 作者: | Chen Y.; Chen H.; Li J.; Xiao L.
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| 刊名: | Water Research
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| ISSN: | 431354
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| 出版年: | 2019
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| 起始页码: | 181
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| 结束页码: | 190
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| 语种: | 英语
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| 英文关键词: | Activated sludge
; Dewaterability
; Electro-fenton
; Floc properties
; Humification
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| Scopus关键词: | Biodegradation
; Dewatering
; Disintegration
; Filtration
; Oxidation
; Sludge digestion
; Activated sludge
; Dewaterability
; Electro-fenton
; Floc properties
; Humification
; Activated sludge process
; polysaccharide
; activated sludge
; dewatering
; efficiency measurement
; humification
; methodology
; oxidation
; polymer
; reaction kinetics
; solubilization
; waste treatment
; activated sludge
; Article
; controlled study
; Fenton reaction
; filtration
; humification
; kinetics
; particle size
; pH
; priority journal
; reaction analysis
; scanning electron microscopy
; sedimentation
; sludge dewatering
; solubilization
; surface property
; suspended particulate matter
; zeta potential
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| 英文摘要: | Advanced oxidation process is one of the important process to improve the efficiency of activated sludge dewatering and digestion. In this study, electro-Fenton (EF) was investigated as a pretreatment method for improving activated sludge dewatering and disintegration in terms of specific resistance to filtration, volatile suspended solids removal and release of soluble organics. The morphology of sludge flocs and properties of extracellular polymeric substance (EPS) were investigated to understand the involved mechanisms. The results showed that EF could increase the dewaterability of activated sludge effectively in 40–60 min. The size of sludge flocs decreased after EF treatment, but zeta potential was elevated to near zero and floc structure became coarser with bigger holes. EF could enhance the sludge floc disintegration, released protein and polysaccharide to soluble EPS fraction, and promote the humification process. The kinetic analysis further indicated that EF increased the pseudo first-order EPS solubilization rate. EF had high operational stability by retaining over 90% initial activity even after five repeated use of dewatering filtrate. This study provides a rapid and efficient solution for improving sludge dewaterability by electro-Fenton. © 2018 Elsevier Ltd |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/122019
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | State Key Laboratory of Pollution Control & Resources Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
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| Recommended Citation: | |
Chen Y.,Chen H.,Li J.,et al. Rapid and efficient activated sludge treatment by electro-Fenton oxidation[J]. Water Research,2019-01-01
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