DOI: 10.1016/j.watres.2017.12.042
Scopus记录号: 2-s2.0-85039757550
论文题名: Enhanced dewaterability of sludge during anaerobic digestion with thermal hydrolysis pretreatment: New insights through structure evolution
作者: Zhang J. ; Li N. ; Dai X. ; Tao W. ; Jenkinson I.R. ; Li Z.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 131 起始页码: 177
结束页码: 185
语种: 英语
英文关键词: Anaerobic digestion
; Dewaterability
; Fractal dimension
; Structure strength
; Thermal hydrolysis
Scopus关键词: Anaerobic digestion
; Elastic moduli
; Fractal dimension
; Fractals
; Hydrolysis
; Particle size
; Sewage sludge
; Structure (composition)
; Dewaterability
; Porous network structures
; Quantitative evaluation
; Rheological characterization
; Sludge dewaterability
; Structure strength
; Thermal hydrolysis
; Thermal hydrolysis pretreatment
; Sludge digestion
; anaerobic digestion
; dewatering
; elastic modulus
; fractal analysis
; hydrolysis
; particle size
; porous medium
; sewage treatment
; sludge
; strength
; surface area
; anaerobic digestion
; Article
; clinical evaluation
; comparative study
; controlled study
; fractal analysis
; hydrolysis
; molecular evolution
; nonhuman
; particle size
; pastry
; priority journal
; quantitative analysis
; sludge dewatering
; structure analysis
; surface area
; thermal hydrolysis pretreatment
; thermotherapy
; viscoelasticity
; waste water management
; Young modulus
英文摘要: Comprehensive insights into the sludge digestate dewaterability were gained through porous network structure of sludge. We measured the evolution of digestate dewaterability, represented by the solid content of centrifugally dewatered cake, in high-solids sequencing batch digesters with and without thermal hydrolysis pretreatment (THP). The results show that the dewaterability of the sludge after digestion was improved by 3.5% (±0.5%) for unpretreated sludge and 5.1% (±0.4%) for thermally hydrolyzed sludge. Compared to the unpretreated sludge digestate, thermal hydrolysis pretreatment eventually resulted in an improvement of dewaterability by 4.6% (±0.5%). Smaller particle size and larger surface area of sludge were induced by thermal hydrolysis and anaerobic digestion treatments. The structure strength and compactness of sludge, represented by elastic modulus and fractal dimension respectively, decreased with increase of digestion time. The porous network structure was broken up by thermal hydrolysis pretreatment and was further weakened during anaerobic digestion, which correspondingly improved the dewaterability of digestates. The logarithm of elastic modulus increased linearly with fractal dimension regardless of the pretreatment. Both fractal dimension and elastic modulus showed linear relationship with dewaterability. The rheological characterization combined with the analysis of fractal dimension of sewage sludge porous network structure was found applicable in quantitative evaluation of sludge dewaterability, which depended positively on both thermal hydrolysis and anaerobic digestion. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113023
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, China; Agence de Conseil et de Recherche Océanographiques, Lavergne, La Roche Canillac 19320, France
Recommended Citation:
Zhang J.,Li N.,Dai X.,et al. Enhanced dewaterability of sludge during anaerobic digestion with thermal hydrolysis pretreatment: New insights through structure evolution[J]. Water Research,2018-01-01,131