DOI: 10.1016/j.watres.2018.10.060
Scopus记录号: 2-s2.0-85055666196
论文题名: Mechanisms of peroxymonosulfate pretreatment enhancing production of short-chain fatty acids from waste activated sludge
作者: Yang J. ; Liu X. ; Wang D. ; Xu Q. ; Yang Q. ; Zeng G. ; Li X. ; Liu Y. ; Gong J. ; Ye J. ; Li H.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 148 起始页码: 239
结束页码: 249
语种: 英语
英文关键词: Anaerobic fermentation
; Peroxymonosulfate
; Short-chain fatty acids
; Waste activated sludge
Scopus关键词: Biodegradability
; Biological materials
; Chains
; Disintegration
; Ethylene
; Ethylene glycol
; Fermentation
; Substrates
; Anaerobic fermentation
; Degradation intermediates
; Fermentation substrates
; Humic acid-like substances
; Peroxymonosulfate
; Short chain fatty acids (SCFAs)
; Short-chain fatty acids
; Waste activated sludges
; Fatty acids
; acetic acid
; butyric acid
; cyclopentasiloxane
; ethylene glycol
; fulvic acid
; glucose
; heptasiloxane
; humic acid
; hydrogen
; hydroxyl radical
; organic compound
; oxygen
; peroxymonosulfate
; short chain fatty acid
; siloxane
; sulfate
; unclassified drug
; activated sludge
; anaerobic digestion
; biodegradation
; fatty acid
; fermentation
; industrial production
; sulfate
; waste technology
; acetogenesis
; acidogenesis
; activated sludge
; anaerobic fermentation
; Article
; batch fermentation
; biodegradability
; bioprocess
; biosynthesis
; chemical oxygen demand
; controlled study
; homoacetogenesis
; hydrolysis
; methanogen
; methanogenesis
; waste water management
英文摘要: Peroxymonosulfate (PMS) has been recently used as an additive to pretreat waste activated sludge (WAS) to enhance short-chain fatty acids (SCFAs) production. However, the mechanisms of how PMS enhances SCFAs production remain largely unknown. This work therefore aims to explore the mechanisms through deeply understanding its impact on the disintegration of sludge cells, the biodegradability of organics released and the bioprocesses involved in anaerobic fermentation, and differentiating the contributions of its degradation intermediates to SCFAs production. This was demonstrated by a series of batch fermentation tests using either real sludge or model organic compounds as fermentation substrates. Experimental results showed that the maximal SCFAs yield increased from 29.69 to 311.67 mg COD/g VSS with PMS level increasing from 0 to 0.09 g/g TSS. No obvious increase in SCFAs yield was observed when PMS further increased. The mechanism explorations revealed that PMS pretreatment not only enhanced the disintegration of sludge cells but also promoted the biodegradability of organics released, thereby providing more biodegradable substrates for subsequent SCFAs production. PMS pretreatment decreased the percentages of fulvic acid-like and humic acid-like substances in the released organics. Moreover, the species and total detection frequency of other recalcitrant organics such as cyclopentasiloxane, heptasiloxane, and ethylene glycol, which were hardly degraded in ordinary anaerobic condition, also decreased remarkably. Although PMS caused harms to some extents to all the microbes in the anaerobic fermentation, its inhibitions to SCFAs consumers were much severer than that to SCFAs producers, probably due to the less tolerance of methanogens. Further analyses exhibited that 1 O 2 , SO 4 •- and •OH were the major contributors to the increased SCFAs production, and their contributions were in the order of 1 O 2 > SO 4 •- > •OH. The findings obtained in this work provide insights into PMS-involved sludge fermentation process and might have important implication for further manipulation of WAS treatment in the future. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122212
Appears in Collections: 气候变化事实与影响
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作者单位: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China; Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia; Hunan Qing Zhi Yuan Environmental Protection Technology Co., Ltd, Changsha, 410004, China; School of Energy Science and Engineering, Central South University, Changsha, 410083, China
Recommended Citation:
Yang J.,Liu X.,Wang D.,et al. Mechanisms of peroxymonosulfate pretreatment enhancing production of short-chain fatty acids from waste activated sludge[J]. Water Research,2019-01-01,148