DOI: 10.1016/j.watres.2018.01.051
Scopus记录号: 2-s2.0-85041387089
论文题名: Free ammonia enhances dark fermentative hydrogen production from waste activated sludge
作者: Wang D. ; Duan Y. ; Yang Q. ; Liu Y. ; Ni B.-J. ; Wang Q. ; Zeng G. ; Li X. ; Yuan Z.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 133 起始页码: 272
结束页码: 281
语种: 英语
英文关键词: Anaerobic fermentation
; Free ammonia
; Hydrogen
; Waste activated sludge
Scopus关键词: Alkalinity
; Ammonia
; Anaerobic digestion
; Carbon monoxide
; Chemical analysis
; Enzyme activity
; Hydrogen
; Sludge digestion
; Substrates
; Sulfur compounds
; Volatile fatty acids
; Anaerobic fermentation
; Carbon monoxide dehydrogenase
; Dark fermentative hydrogen production
; Free ammonia
; Hydrogen consumption
; Standard conditions
; Volatile suspended solids
; Waste activated sludges
; Hydrogen production
; acetate kinase
; adenylylsulfate reductase
; ammonia
; butyrate kinase
; carbon monoxide dehydrogenase
; coenzyme A transferase
; hydrogen
; iron hydrogenase
; phosphotransferase
; proteinase
; unclassified drug
; ammonia
; ammonium derivative
; hydrogen
; activated sludge
; ammonia
; ammonium
; anaerobic digestion
; carbon monoxide
; enzyme
; enzyme activity
; fermentation
; hydrogen
; hydrolysis
; inhibition
; microbial activity
; activated sludge
; anaerobic fermentation
; Article
; biosynthesis
; controlled study
; enzyme activity
; enzyme analysis
; homoacetogenesis
; hydrogen evolution
; methanogenesis
; nonhuman
; priority journal
; reactor operation
; sulfate reducer
; suspended particulate matter
; bioreactor
; chemistry
; fermentation
; hydrolysis
; metabolism
; pH
; sewage
; Ammonia
; Ammonium Compounds
; Bioreactors
; Fermentation
; Hydrogen
; Hydrogen-Ion Concentration
; Hydrolysis
; Sewage
英文摘要: Ammonium and/or free ammonia (the unionized form of ammonium) are generally thought to inhibit the activities of microbes involved in anaerobic digestion of waste activated sludge. It was found in this work, however, that the presence of ammonium (NH4 +-N) largely enhanced dark fermentative hydrogen production from alkaline pretreated-sludge. With the increase of initial NH4 +-N level from 36 to 266 mg/L, the maximal hydrogen production from alkaline (pH 9.5) pretreated-sludge increased from 7.3 to 15.6 mL per gram volatile suspended solids (VSS) under the standard condition. Further increase of NH4 +-N to 308 mg/L caused a slight decrease of hydrogen yield (15.0 mL/g VSS). Experimental results demonstrated that free ammonia instead of NH4 +-N was the true contributor to the enhancement of hydrogen production. It was found that the presence of free ammonia facilitated the releases of both extracellular and intracellular constituents, which thereby provided more substrates for subsequent hydrogen production. The free ammonia at the tested levels (i.e., 0–444 mg/L) did not affect acetogenesis significantly. Although free ammonia inhibited all other bio-processes, its inhibition to the hydrogen consumption processes (i.e., homoacetogenesis, methanogenesis, and sulfate-reducing process) was much severer than that to the hydrolysis and acidogenesis processes. Further investigations with enzyme analyses showed that free ammonia posed slight impacts on protease, butyrate kinase, acetate kinase, CoA-transferase, and [FeFe] hydrogenase activities but largely suppressed the activities of coenzyme F420, carbon monoxide dehydrogenase, and adenylyl sulfate reductase, which were consistent with the chemical analyses performed above. © 2018 Elsevier Ltd
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112930
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
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; Advanced Water Management Centre, The University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia; Griffith School of Engineering & Centre for Clean Environment and Energy, Griffith UniversityQLD, Australia
Recommended Citation:
Wang D.,Duan Y.,Yang Q.,et al. Free ammonia enhances dark fermentative hydrogen production from waste activated sludge[J]. Water Research,2018-01-01,133