DOI: 10.1016/j.watres.2017.11.050
Scopus记录号: 2-s2.0-85035032062
论文题名: Free nitrous acid pre-treatment of waste activated sludge enhances volatile solids destruction and improves sludge dewaterability in continuous anaerobic digestion
作者: Wei W. ; Wang Q. ; Zhang L. ; Laloo A. ; Duan H. ; Batstone D.J. ; Yuan Z.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 130 起始页码: 13
结束页码: 19
语种: 英语
英文关键词: Anaerobic digestion
; Dewaterability
; Free nitrous acid
; Pre-treatment
; Volatile solids reduction
; Waste activated sludge
Scopus关键词: Anaerobic digestion
; Bioactivity
; Biodegradability
; Cost benefit analysis
; Cost reduction
; Economic analysis
; Inorganic acids
; Methane
; Pulp digesters
; Sludge disposal
; Dewaterability
; Free nitrous acids
; Pre-Treatment
; Volatile solids reductions
; Waste activated sludges
; Sludge digestion
; ammonia
; free nitrous acid
; methane
; nitrous acid
; unclassified drug
; methane
; nitrous acid
; acid digestion
; activated sludge
; anaerobic digestion
; biodegradation
; dewatering
; methane
; organic acid
; pathogen
; reduction
; volatile substance
; activated sludge
; anaerobic digestion
; Article
; biochemical analysis
; centrifugation
; concentration (parameters)
; control system
; dewaterability
; economic aspect
; fecal coliform
; nonhuman
; priority journal
; sludge digestion
; sludge disposal
; volatile solid reduction
; waste component removal
; waste water management
; anaerobic growth
; bioreactor
; bioremediation
; chemistry
; procedures
; sewage
; Anaerobiosis
; Biodegradation, Environmental
; Bioreactors
; Methane
; Nitrous Acid
; Sewage
; Waste Disposal, Fluid
英文摘要: Previous work has demonstrated that pre-treatment of waste activated sludge (WAS) with free nitrous acid (FNA i.e. HNO2) enhances the biodegradability of WAS, identified by a 20–50% increase in specific methane production in biochemical methane potential (BMP) tests. This suggests that FNA pre-treatment would enhance the destruction of volatile solids (VS) in an anaerobic sludge digester, and reduce overall sludge disposal costs, provided that the dewaterability of the digested sludge is not negatively affected. This study experimentally evaluates the impact of FNA pre-treatment on the VS destruction in anaerobic sludge digestion and on the dewaterability of digested sludge, using continuously operated bench-scale anaerobic digesters. Pre-treatment of full-scale WAS for 24 h at an FNA concentration of 1.8 mg NN/L enhanced VS destruction by 17 ± 1% (from 29.2 ± 0.9% to 34.2 ± 1.1%) and increased dewaterability (centrifuge test) from 12.4 ± 0.4% to 14.1 ± 0.4%. Supporting the VS destruction data, methane production increased by 16 ± 1%. Biochemical methane potential tests indicated that the final digestate stability was also improved with a lower potential from FNA treated digestate. Further, a 2.1 ± 0.2 log improvement in pathogen reduction was also achieved. With inorganic solids representing 15–22% of the full-scale WAS used, FNA pre-treatment resulted in a 16–17% reduction in the volume of dewatered sludge for final disposal. This results in significantly reduced costs as assessed by economic analysis. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113065
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Advanced Water Management Centre, The University of Queensland, St. Lucia, QLD 4072, Australia; Centre for Clean Environment and Energy, Griffith University, Gold Coast CampusQLD 4222, Australia; Griffith School of Engineering, Griffith University, Nathan CampusQLD 4111, Australia
Recommended Citation:
Wei W.,Wang Q.,Zhang L.,et al. Free nitrous acid pre-treatment of waste activated sludge enhances volatile solids destruction and improves sludge dewaterability in continuous anaerobic digestion[J]. Water Research,2018-01-01,130