DOI: 10.1016/j.watres.2018.06.009
Scopus记录号: 2-s2.0-85049353034
论文题名: Investigation on extracellular polymeric substances, sludge flocs morphology, bound water release and dewatering performance of sewage sludge under pretreatment with modified phosphogypsum
作者: Dai Q. ; Ma L. ; Ren N. ; Ning P. ; Guo Z. ; Xie L. ; Gao H.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 337
结束页码: 346
语种: 英语
英文关键词: Binding energy
; Dewatering
; Extracellular polymeric substances
; Fractal dimension
; Sewage sludge
Scopus关键词: Binding energy
; Dewatering
; Fractal dimension
; Gypsum
; Linear regression
; Sewage sludge
; Water filtration
; Charge neutralization
; Dehydration performance
; Dewatering performance
; Extra-cellular polymeric substances
; Morphology distributions
; Multiple linear regression models
; Multiple regression model
; Specific resistance of filtration
; Polymers
; calcium sulfate
; phosphogypsum
; polymer
; unclassified drug
; chemical binding
; chemical substance
; dewatering
; exopolymer
; filtration
; fractal analysis
; gypsum
; molecular analysis
; morphology
; organic compound
; performance assessment
; sewage treatment
; sludge
; water treatment
; Article
; chemical binding
; flocculation
; molecular weight
; priority journal
; sludge dewatering
; sludge treatment
; zeta potential
英文摘要: Modified phosphogypsum (MPG) was developed to improve dewaterability of sewage sludge, and dewatering performance, properties of treated sludge, composition and morphology distribution of EPS, dynamic analysis and multiple regression model on bound water release were investigated. The results showed that addition of MPG caused extracellular polymeric substances (EPS) disintegration through charge neutralization. Destruction of EPS promoted the formation of larger sludge flocs and the release of bound water into supernatant. Simultaneously, content of organics with molecular weight between 1000 and 7000 Da in soluble EPS (SB-EPS) increased with increasing of EPS dissolved into the liquid phase. Besides, about 8.8 kg•kg−1DS of bound water was released after pretreatment with 40%DS MPG dosage. Additionally, a multiple linear regression model for bound water release was established, showing that lower loosely bond EPS (LB-EPS) content and specific resistance of filtration (SRF) may improve dehydration performance, and larger sludge flocs may be beneficial for sludge dewatering. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112617
Appears in Collections: 气候减缓与适应
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作者单位: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Recommended Citation:
Dai Q.,Ma L.,Ren N.,et al. Investigation on extracellular polymeric substances, sludge flocs morphology, bound water release and dewatering performance of sewage sludge under pretreatment with modified phosphogypsum[J]. Water Research,2018-01-01,142