DOI: 10.1016/j.watres.2018.10.058
Scopus记录号: 2-s2.0-85055895882
论文题名: Effect of mixing intensity on hydrolysis and acidification of sewage sludge in two-stage anaerobic digestion: Characteristics of dissolved organic matter and the key microorganisms
作者: Ma S.-J. ; Ma H.-J. ; Hu H.-D. ; Ren H.-Q.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 359
结束页码: 367
语种: 英语
英文关键词: Bacterial community dynamics
; Dissolved organic matter
; Fluorescent component
; Mixing intensity
; Molecular characteristic
Scopus关键词: Acidification
; Biogeochemistry
; Biological materials
; Clostridium
; Dissolution
; Efficiency
; Hydrolysis
; Mixing
; Organic acids
; Proteins
; Sewage sludge
; Sludge digestion
; Wastewater treatment
; Bacterial community
; Dissolved organic matters
; Fluorescent component
; Mixing intensity
; Molecular characteristics
; Anaerobic digestion
; dissolved organic matter
; enzyme
; humic acid
; acidification
; anaerobic digestion
; bacterium
; community dynamics
; dissolved organic matter
; fluorescence
; hydrolysis
; methanogenesis
; microorganism
; mixing
; molecular analysis
; sewage
; sludge
; wastewater treatment plant
; acidification
; Actinobacteria
; anaerobic digestion
; Article
; Bacteroidetes
; chemical oxygen demand
; Clostridiales
; Clostridium
; Firmicutes
; Fusobacteria
; hydrolysis
; microbial community
; molecular dynamics
; molecular weight
; nonhuman
; particle size
; priority journal
; Proteobacteria
; sludge
; solids retention time
; Actinobacteria
; Bacteria (microorganisms)
; Chloroflexi
; Chloroflexi (class)
; Clostridium
; Firmicutes
; Fusobacteria
英文摘要: Mixing should be optimized in anaerobic digestion (AD) systems to achieve excellent biomaterials production in the sewage sludge (SS) management in wastewater treatment plant. AD depends on the coordinated activity of hydrolysis, acidification and methanogenesis. However, the effect of mixing intensity on characteristics of hydrolysis and acidification in AD of SS is still poorly understood. This study focused on the mixing intensity (30, 60, 90 and 120 rpm) effect on the characteristics of dissolved organic matter (DOM) and the key microorganisms in the hydrolysis and acidification of SS. Results showed that enhanced hydrolysis and acidification efficiency was obtained at mixing of 90 and 120 rpm (p < 0.05), while the maximum acetic acid (388 ± 21 mg/L) was produced at 90 rpm. Mixing at 90 rpm enhanced the release of protein and polysaccharide as well as humic acid. Further analyses of DOM molecular features revealed that 90 rpm led to the highest molecular diversity and easily biodegradable molecules (lipid and proteins/amino sugars), which contributed to the maximum hydrolysis and acidification efficiency. Firmicutes and Actinobacteria significantly increased with mixing intensity (p<0.05), and Chloroflexi and Fusobacteria were enriched at mixing of 90 rpm, which favored the hydrolysis of SS. The enrichment of Clostridium XI and Clostridium sensu stricto contributed to the acidification of DOM at 90 and 120 rpm. The results of this study can advance our knowledge about mixing intensity effects on the AD systems of SS. This research also showed how increasing mixing intensity to a relatively high speed can enhance the hydrolysis and acidification efficiency of SS. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122203
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, China
Recommended Citation:
Ma S.-J.,Ma H.-J.,Hu H.-D.,et al. Effect of mixing intensity on hydrolysis and acidification of sewage sludge in two-stage anaerobic digestion: Characteristics of dissolved organic matter and the key microorganisms[J]. Water Research,2019-01-01