DOI: 10.1016/j.watres.2018.05.044
Scopus记录号: 2-s2.0-85049300120
论文题名: Transformation of dissolved organic matters produced from alkaline-ultrasonic sludge pretreatment in anaerobic digestion: From macro to micro
作者: Lu D. ; Xiao K. ; Chen Y. ; Soh Y.N.A. ; Zhou Y.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 138
结束页码: 146
语种: 英语
英文关键词: Alkaline
; Anaerobic digestion
; Dissolved organic matters
; Pretreatment
; Recalcitrant compounds
; Ultrasonic
Scopus关键词: Alkalinity
; Biogeochemistry
; Biological materials
; Dissolution
; Fatty acids
; Glycerol
; Lipids
; Molecular weight
; Organic carbon
; Sludge digestion
; Ultrasonics
; Water treatment
; Alkaline
; Dissolved organic carbon
; Dissolved organic matters
; High molecular weight
; Pre-Treatment
; Recalcitrant compounds
; Sludge solubilization
; Soluble organic compounds
; Anaerobic digestion
; alkane
; alkene
; biogas
; diacylglycerol
; dissolved organic matter
; flavonoid
; glycerophospholipid
; long chain fatty acid
; methane
; sphingolipid
; alkalinity
; anaerobic digestion
; benzene
; biodegradation
; biogas
; chemical compound
; dissolved organic carbon
; methane
; pollutant removal
; protein
; sludge
; solubilization
; transformation
; ultrasonics
; waste treatment
; anaerobic digestion
; Article
; biodegradability
; humic substance
; molecular weight
; priority journal
; sludge treatment
; solubilization
; water treatment
英文摘要: Soluble organic compounds released by alkaline (ALK), ultrasonic (ULS) and combined alkaline-ultrasonic (ALK-ULS) pretreatment as well as their transformation in the anaerobic digestion systems were investigated. The maximum methane production of 197.1 ± 3.0 mL CH4/g tCODfeed was observed with ALK-ULS pretreated sludge (pH 12 and specific energy input of 24 kJ/g TS). The combined treatment likely enhanced the sludge solubilization and produced more low molecular weight (LMW) substances, which were beneficial to improve the biogas generation rate. However, such pretreatment released not only easily biodegradable substances but also more recalcitrants, such as humic substances (HS) and complex high molecular weight (HMW) proteins. Thus, more residual dissolved organic matters (DOMs) were detected after digestion, which may pose adverse effects on the downstream water treatment. Refractory HS and hydrophobic dissolved organic carbon (HO DOC) were the main components of the residual DOMs, which accounted up to 35.0% and 22.3% respectively. At the molecular level, a large amount of residual polycyclic steroid-like matters, alkanes and aromatics were identified. Specific higher MW residual compounds, e.g. polar metabolites (like dipeptide, benzene and substituted derivatives), and non-polar lipids (like diacylglycerols, long chain fatty acids, alkenes, flavonoids, sphingolipids, glycerolipids, glycerophospholipids and their derivatives) were also identified. The results indicate that further polishing steps should be considered to remove the remaining soluble recalcitrant compounds. This study helps to understand the insight of sludge treatment from macro to micro level. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112647
Appears in Collections: 气候减缓与适应
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作者单位: School of Civil and Environmental Engineering, Nanyang Technological University639798, Singapore; Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University637141, Singapore
Recommended Citation:
Lu D.,Xiao K.,Chen Y.,et al. Transformation of dissolved organic matters produced from alkaline-ultrasonic sludge pretreatment in anaerobic digestion: From macro to micro[J]. Water Research,2018-01-01,142