DOI: 10.1016/j.watres.2018.08.011
Scopus记录号: 2-s2.0-85053054911
论文题名: Free nitrous acid promotes hydrogen production from dark fermentation of waste activated sludge
作者: Wang Y. ; Zhao J. ; Wang D. ; Liu Y. ; Wang Q. ; Ni B.-J. ; Chen F. ; Yang Q. ; Li X. ; Zeng G. ; Yuan Z.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 145 起始页码: 113
结束页码: 124
语种: 英语
英文关键词: Anaerobic fermentation
; Biohydrogen production
; Free nitrous acid
; Waste activated sludge
Scopus关键词: Biodegradability
; Fermentation
; Gas producers
; Inorganic acids
; Microorganisms
; Substrates
; Wastewater treatment
; Anaerobic fermentation
; Bio-hydrogen production
; Enhanced hydrogen productions
; Free nitrous acid (FNA)
; Free nitrous acids
; Mechanism investigation
; Waste activated sludges
; Wastewater treatment plants
; Hydrogen production
; activated sludge
; anoxic conditions
; biodegradation
; concentration (composition)
; fermentation
; hydrogen
; inhibition
; microbial community
; nitrite
; nitrous acid
; pollutant removal
; wastewater
; wastewater treatment plant
; Citrobacter
; Clostridium aceticum
; Dechloromonas
英文摘要: Simultaneous sludge fermentation and nitrite removal is an effective approach to enhance nutrient removal from low carbon-wastewater. It was found in this work that the presence of nitrite largely promoted hydrogen production from acidic fermentation of waste activated sludge (WAS). The results showed that with an increase of nitrite from 0 to 250 mg/L, the maximal hydrogen yield increased from 8.5 to 15.0 mL/g VSS at pH 5.5 fermentation and 8.1–13.0 mL/g VSS at pH 6 fermentation. However, the maximal hydrogen yield from WAS fermentation at pH 8 remained almost constant (2.9–3.7 mL/g VSS) when nitrite was in the range of 0–250 mg/L. Further analyses revealed that free nitrous acid (FNA) rather than nitrite was the major contributor to the promotion of hydrogen yield. The mechanism investigations showed that FNA not only accelerated the disruption of sludge cells but also promoted the biodegradability of organics released, thereby provided more biodegradable substrates for subsequent hydrogen production. Although FNA inhibited activities of all microbes involved in the anaerobic fermentation, its inhibitions to hydrogen consumers were much severer than those to hydrolytic microorganisms and hydrogen producers. Further investigations with microbial community showed that FNA increased the abundances of hydrogen producers (e.g., Citrobacter sp.) and denitrifiers (e.g., Dechloromonas sp.), but reduced the abundances of hydrogen consumers (e.g., Clostridium_aceticum). This work demonstrated for the first time that FNA in WAS fermentation systems enhanced hydrogen production. The findings obtained expand the application field of FNA and may provide supports for sustainable operation of wastewater treatment plants. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112443
Appears in Collections: 气候减缓与适应
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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; Griffith School of Engineering & Centre for Clean Environment and Energy, Griffith UniversityQLD, Australia; Advanced Water Management Centre, The University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
Recommended Citation:
Wang Y.,Zhao J.,Wang D.,et al. Free nitrous acid promotes hydrogen production from dark fermentation of waste activated sludge[J]. Water Research,2018-01-01,145