DOI: 10.1016/j.watres.2018.01.008
Scopus记录号: 2-s2.0-85040118904
论文题名: Post-anaerobic digestion thermal hydrolysis of sewage sludge and food waste: Effect on methane yields, dewaterability and solids reduction
作者: Svensson K. ; Kjørlaug O. ; Higgins M.J. ; Linjordet R. ; Horn S.J.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 132 起始页码: 158
结束页码: 166
语种: 英语
英文关键词: Anaerobic digestion
; Biogas
; Post-treatment
; Sewage sludge
; Steam explosion
; THP
Scopus关键词: Biogas
; Dewatering
; Efficiency
; Hydrolysis
; Methane
; Sewage sludge
; Sludge digestion
; Source separation
; Thermogravimetric analysis
; Conventional systems
; Digestion treatments
; Improving efficiency
; Post treatment
; Steam explosion
; Thermal hydrolysis process
; Treatment technologies
; Waste activated sludges
; Anaerobic digestion
; methane
; methane
; anaerobic digestion
; biogas
; dewatering
; efficiency measurement
; food waste
; hydrolysis
; methane
; reduction
; sewage treatment
; sludge
; solid
; activated sludge
; anaerobic digestion
; Article
; controlled study
; food waste
; hydrolysis
; liquid
; mesophile
; nonhuman
; plant
; postanaerobic digestion
; priority journal
; retention time
; sludge
; sludge dewatering
; solid
; temperature
; thermogravimetry
; anaerobic growth
; chemistry
; food
; heat
; hydrolysis
; metabolism
; procedures
; sewage
; waste
; waste management
; Anaerobiosis
; Food
; Hot Temperature
; Hydrolysis
; Methane
; Sewage
; Waste Management
; Waste Products
英文摘要: Post-anaerobic digestion (PAD) treatment technologies have been suggested for anaerobic digestion (AD) to improve process efficiency and assure hygenization of organic waste. Because AD reduces the amount of organic waste, PAD can be applied to a much smaller volume of waste compared to pre-digestion treatment, thereby improving efficiency. In this study, dewatered digestate cakes from two different AD plants were thermally hydrolyzed and dewatered, and the liquid fraction was recirculated to a semi-continuous AD reactor. The thermal hydrolysis was more efficient in relation to methane yields and extent of dewaterability for the cake from a plant treating waste activated sludge, than the cake from a plant treating source separated food waste (SSFW). Temperatures above 165 °C yielded the best results. Post-treatment improved volumetric methane yields by 7% and the COD-reduction increased from 68% to 74% in a mesophilic (37 °C) semi-continuous system despite lowering the solid retention time (from 17 to 14 days) compared to a conventional system with pre-treatment of feed substrates at 70 °C. Results from thermogravimetric analysis showed an expected increase in maximum TS content of dewatered digestate cake from 34% up to 46% for the SSFW digestate cake, and from 17% up to 43% in the sludge digestate cake, after the PAD thermal hydrolysis process (PAD-THP). The increased dewatering alone accounts for a reduction in wet mass of cake leaving the plant of 60% in the case of sludge digestate cake. Additionaly, the increased VS-reduction will contribute to further reduce the mass of wet cake. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112971
Appears in Collections: 气候减缓与适应
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作者单位: NIBIO, Norwegian Institute of Bioeconomy Research, P.O. Box 115, Ås, N-1431, Norway; Cambi AS, Skysstasjon 11A, Asker, 1383, Norway; Department of Civil and Environmental Engineering, Bucknell University, Lewisburg, PA 17837, United States; Faculty of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, Ås, Norway
Recommended Citation:
Svensson K.,Kjørlaug O.,Higgins M.J.,et al. Post-anaerobic digestion thermal hydrolysis of sewage sludge and food waste: Effect on methane yields, dewaterability and solids reduction[J]. Water Research,2018-01-01,132