期刊
BIORESOURCE TECHNOLOGY
卷 163, 期 -, 页码 186-192出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.04.037
关键词
Kitchen wastes; Anaerobic digestion; Volatile fatty acids; Microbial community
资金
- National Scientific and Technological Support of China [2012BAC18B01-2]
- Natural Science Foundation of Jiangsu Province [BK20130126]
- National Natural Science Foundation of China [21276114]
Anaerobic digestion is considered to be an efficient way of disposing kitchen wastes, which can not only reduce waste amounts, but also produce biogas. However, the excessive accumulation of volatile fatty acids (VFA) caused by high organic loads will inhibit anaerobic digestion intensively. Effects of the VFA composition on biogas generation and microbial community are still required for the investigation under various organic loads of kitchen wastes. Our results showed that the maximum specific methane production was 328.3 ml g TS-1, and acetic acid was the main inhibitor in methanogenesis. With the increase of organic load, aceticlastic methanogenesis was more sensitive to acetic acid than hydrogenotrophic methanogenesis. Meanwhile, rnethanogenic microbial community changed significantly, and few species grew well under excessive organic loads. This study provides an attempt to reveal the mechanism of VFA inhibition in anaerobic digestion of kitchen wastes. (C) 2014 Elsevier Ltd. All rights reserved.
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