期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 20, 页码 9471-9480出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.07.103
关键词
Anaerobic co-digestion; Fat, oil, and grease; Synthetic kitchen waste; Methane production; Linear anti non-linear modeling
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Ontario Ministry of Research Innovation (MRI)
- Early Researcher Award program
- Department of Chemical Engineering of Queen's University (Kingston, Canada)
The feasibility of using synthetic kitchen waste (KW) and fat, oil, and grease (FOG) as co-substrates in the anaerobic digestion of waste activated sludge (WAS) was investigated using two series of biochemical methane potential (BMP) tests. Ranges of ideal substrate to inoculum (S/I) ratio were determined for the FOG (0.25-0.75) and KW (0.80-1.26) as single substrates in the first experiment. The second experiment, which estimated the methane production performances of FOG and KW as co-substrates for WAS co-digestion, was conducted based on the optimal parameters selected from the results of the first experiment. Results indicated that co-digestions with FOG and KW enhanced methane production from 117 +/- 2.02 mL/gTVS (with only WAS) to 418 +/- 13.7 mL/gTVS and 324 +/- 4.11 mL/gTVS, respectively. FOG exhibited more biogas production than KW as co-substrate. Non-linear regression results showed that co-substrate addition shortened the lag phases of organic biodegradation from 81.8 (with only WAS) to 28.3 h with FOG and 3.90 h with KW. (C) 2011 Elsevier Ltd. All rights reserved.
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