DOI: 10.1016/j.watres.2018.12.009
Scopus记录号: 2-s2.0-85062674637
论文题名: Effect of humic acids on batch anaerobic digestion of excess sludge
作者: Li J. ; Hao X. ; van Loosdrecht M.C.M. ; Luo Y. ; Cao D.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 155 起始页码: 431
结束页码: 443
语种: 英语
英文关键词: Active functional groups
; Activities of key enzymes
; Anaerobic digestion (AD)
; Humic acids (HA)
; Inhibition
; Terminal electron acceptor (TEA)
英文摘要: Anaerobic digestion (AD) is a sustainable pathway towards recovering chemical energy from excess sludge, and humic substances (HSs) contained in sludge can inhibit energy (methane/CH 4 ) conversion efficiency. This study aims to investigate the impact of humic acids (HA) on the various processes in a batch anaerobic digestion process. For this purpose, “clean” sludge was cultivated in a laboratory to avoid HSs presence. The cultivated sludge was used in a series of batch experiments, with humic acids added at different levels. A complete AD test, as well as three sub-phase tests (hydrolytic phase; acidogenic phase; methanogenic phase) was performed and analyzed with and without HA dosing. In the single-phase AD system, dosing with HA inhibited the methanogenic efficiency by 35.1% at HA:VSS = 15%. However, the effects of HA on the three sub-phases revealed something very different. HA inhibited hydrolytic efficiency by 38.2%, promoted acidogenic efficiency by 101.5%, and finally inhibited methanogenic efficiency by 52.2%. The combined efficiency of the three sub-phases without HA dosing is calculated at 15.7%; and with HA dosing (HA:VSS = 15%) at 10.2%. Overall, the combined inhibition efficiency of the three sub-phases is equal to 35.0%, which is almost identical (35.1%) to the result observed in the single-phase AD process. The possible mechanisms behind the phenomena were analyzed and summarized in the context. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121884
Appears in Collections: 气候变化事实与影响
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作者单位: Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies/Beijing Advanced Innovation Center of Future Urban Design, Beijing University of Civil Engineering & Architecture, Beijing, 100044, China; Dept. of Biotechnology, Delft University of Technology, van der Maasweg 9, Delft, HZ 2629, Netherlands
Recommended Citation:
Li J.,Hao X.,van Loosdrecht M.C.M.,et al. Effect of humic acids on batch anaerobic digestion of excess sludge[J]. Water Research,2019-01-01,155