DOI: 10.1016/j.watres.2018.06.061
Scopus记录号: 2-s2.0-85052147950
论文题名: Response of enhanced sludge methanogenesis by red mud to temperature: Spectroscopic and electrochemical elucidation of endogenous redox mediators
作者: Ye J. ; Hu A. ; Cheng X. ; Lin W. ; Liu X. ; Zhou S. ; He Z.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 143 起始页码: 240
结束页码: 249
语种: 英语
英文关键词: Endogenous redox mediators (ERMs)
; Functional groups
; Red mud
; Spectroscopic elucidation
; Temperature
Scopus关键词: Amides
; Amines
; Anaerobic digestion
; Functional groups
; Methane
; Temperature
; Temperature distribution
; Increasing temperatures
; Linear relationships
; Methane accumulation
; Methanogenic archaea
; Red mud
; Redox mediators
; Spectroscopic elucidation
; Temperature variation
; Conductive materials
; activated sludge
; bacterium
; biochemical composition
; induced response
; methanogenesis
; mud
; prokaryote
; redox conditions
; spectroscopy
; temperature effect
英文摘要: Adding conductive materials can promote methanogenesis via facilitating electron exchange between syntrophic bacteria and methanogenic archaea. However, little is known about how temperature would interact with such an addition and thus affect the compositions and characteristics of endogenous redox mediators (ERMs). In particular, it is of strong interest to understand how the temperature variation would affect the improvement on methanogenesis induced by ERMs with conductive materials. Herein, we have investigated the response of sludge methanogenesis to temperature variation (from 15 to 35 °C) and spectroscopically detected the ERMs induced by conductive red mud. It was demonstrated that the increasing temperature enhanced the stimulating effect of conductive red mud on methane accumulation, and the methane production potential showed a linear relationship with redox parameters such as areal capacitance (Ca), free charges (R2) and electron exchange capacity (EEC). 2DCOS spectra further indicated that ν(C-O) and δ(O-H) in humic acids, β-turn type III amide I νs(C=O) in Cytochrome c, and δ(C-H) in amines and lipids became the main redox groups in ERMs at 35 °C with the addition of red mud. The model revealed that the contribution of ERMs to the CO2 reduction to CH4 increased from 35.2 ± 1.4% to 58.6 ± 1.5% when the temperature increased from 15 to 35 °C. Our finding that conductive materials stimulated the formation and electroactivity of ERMs with the increasing temperature during anaerobic digestion can have important implications for the improvement of engineered methanogenic processes. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112550
Appears in Collections: 气候减缓与适应
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作者单位: Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States
Recommended Citation:
Ye J.,Hu A.,Cheng X.,et al. Response of enhanced sludge methanogenesis by red mud to temperature: Spectroscopic and electrochemical elucidation of endogenous redox mediators[J]. Water Research,2018-01-01,143