DOI: 10.1016/j.watres.2018.01.062
Scopus记录号: 2-s2.0-85041519691
论文题名: Enhancing sludge methanogenesis with improved redox activity of extracellular polymeric substances by hematite in red mud
作者: Ye J. ; Hu A. ; Ren G. ; Chen M. ; Tang J. ; Zhang P. ; Zhou S. ; He Z.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 134 起始页码: 54
结束页码: 62
语种: 英语
英文关键词: Aggregates
; Conductive materials
; Extracellular polymeric substances (EPS)
; Interspecies electron transfer
; Redox activity
Scopus关键词: Aggregates
; Anaerobic digestion
; Electron transitions
; Electron transport properties
; Hematite
; Metals
; Polymers
; Redox reactions
; Sludge digestion
; Electron transfer
; Electron transfer process
; Engineered environments
; Extracellular polymeric substances
; Methanogenic archaea
; Redox activity
; Scientific evidence
; Waste activated sludges
; Conductive materials
; cation
; cytochrome c
; ferric oxide
; methane
; mineral
; organic matter
; polymer
; polysaccharide
; protein
; biopolymer
; ferric ion
; ferric oxide
; activated sludge
; aggregation
; anaerobic digestion
; electron
; hematite
; humic substance
; methane
; methanogenesis
; mud
; polymer
; redox conditions
; activated sludge
; anaerobic digestion
; Article
; biogeochemical cycling
; chemical oxygen demand
; controlled study
; electron transport
; humic substance
; methanogenesis
; methanogenic archaeon
; nonhuman
; oxidation reduction reaction
; particle size
; priority journal
; sludge
; soil
; solubilization
; archaeon
; bacterium
; metabolism
; microbiology
; sewage
; Archaea
; Bacteria
; Biopolymers
; Electron Transport
; Ferric Compounds
; Methane
; Sewage
英文摘要: Different conductive materials have been employed to stimulate direct interspecies electron transfer (DIET) during methanogenesis, but few studies have been concerned with the interaction between conductive materials and extracellular polymeric substances (EPS) such as the effect on sludge aggregation and redox activity of EPS. This study aims to systematically investigate the role of red mud with 45.46 wt% hematite on methanogenesis during the anaerobic digestion of waste activated sludge. The results showed that the multivalent cations from hematite effectively promoted the formation of large and compact aggregates, which might contribute to the rapid direct electron exchange during the DIET process. Meanwhile, more redox-active mediators including c-type cytochromes (c-Cyts) and humic substances, particularly in tight-bound EPS (TB-EPS), and more redox-active metals such as Fe introduced by red mud could take part in the interspecies electron transfer process between syntrophic bacteria and methanogenic archaea, which also promoted methane production (35.52 ± 2.64% increase compared with the control). This study provided initial scientific evidence to comprehensively assess the role of conductive materials during methanogenesis, with important implications for the biogeochemical redox processes of conductive minerals in natural and engineered environments. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112924
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; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China; Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States
Recommended Citation:
Ye J.,Hu A.,Ren G.,et al. Enhancing sludge methanogenesis with improved redox activity of extracellular polymeric substances by hematite in red mud[J]. Water Research,2018-01-01,134