期刊
BIORESOURCE TECHNOLOGY
卷 189, 期 -, 页码 319-326出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.04.033
关键词
Biogas; Co-digestion; Rice straw; Cow manure; Stability
资金
- National Natural Science Foundation of China [21476222]
- National Key Technology Support Program of China [2014BAD02B04]
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences [KLCAS-2014-01]
In order to investigate the effects of feedstock ratio and organic loading rate (OLR) on the anaerobic mesophilic co-digestion of rice straw (RS) and cow manure (CM), batch tests (2.5 L) were carried out at volatile solid (VS) ratios of 0:1, 1:2, 1:1, 2:1, and 1:0 (RS/CM), and continuous bench experiments (40 L) were carried out at OLRs of 3.0, 3.6, 4.2, 4.8, 6.0, 8.0, and 12.0 kg VS/(m(3) d) with optimal VS ratio. The optimal VS ratio was found to be 1:1. Stable and efficient co-digestion with average specific biogas production of 383.5 L/kg VS and volumetric biogas production rate of 2.30 m(3)/(m(3) d) was obtained at an OLR of 6 kg VS/(m(3) d). Anaerobic co-digestion was severely inhibited by the accumulation of volatile fatty acids instead of ammonia when the OLR was 12 kg VS/(m(3) d). Further, significant foaming was observed at OLR >= 8 kg VS/(m(3) d). (C) 2015 Elsevier Ltd. All rights reserved.
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