title: Effects of feedstock ratio and organic loading rate on the anaerobic mesophilic co-digestion of rice straw and pig manure.
abstract: 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 pig manure (PM), batch bottle tests (2.5L) were carried out at volatile solid (VS) ratios of 0:1, 1:2, 1:1, 2:1, and 1:0 (RS/PM), and continuous bench experiments (40L) were carried out at OLRs of 3.0, 3.6, 4.2, 4.8, 6.0, 8.0, and 12.0kg VS/(m(3)d) with optimal VS ratio. The results showed that the optimal ratio was 1:1 in terms of biogas yield. Stable biogas production with an average specific biogas production of 413L/kg VS was obtained at an OLR of 3-8kg VS/(m(3)d). Anaerobic co-digestion was severely inhibited by the accumulation of volatile fatty acids when the OLR was 12kg VS/(m(3)d). Further, light and serious foaming were observed at OLR of 8 and 12kg VS/(m(3)d), respectively.
authors.affiliation: Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.affiliation: Chengdu Zhongke Energy & Environmental Protection Co. Ltd, Chengdu 610041, China.
authors.forename: Shengchu
authors.initials: S
authors.lastname: Liu
authors.affiliation: Chengdu Zhongke Energy & Environmental Protection Co. Ltd, Chengdu 610041, China.
authors.forename: Li
authors.initials: L
authors.lastname: Mi
authors.affiliation: Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China.
authors.forename: Zhidong
authors.initials: Z
authors.lastname: Li
authors.affiliation: Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China.
authors.forename: Yuexiang
authors.initials: Y
authors.lastname: Yuan
authors.affiliation: Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China.
authors.forename: Zhiying
authors.initials: Z
authors.lastname: Yan
authors.affiliation: Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China. Electronic address: liuxf@cib.ac.cn.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Liu
mesh_terms: D000383:Agriculture / Q000379:methods; D000818:Animals; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D003198:Computer Simulation; D007220:Industrial Waste / Q000517:prevention & control; D008372:Manure / Q000382:microbiology*; D008697:Methane / Q000378:metabolism*; D008954:Models, Biological; D012275:Oryza / Q000382:microbiology*; D018547:Plant Stems / Q000382:microbiology*; D012037:Refuse Disposal / Q000379:methods; D013552:Swine
chemical_list: D007220:Industrial Waste; D008372:Manure; D008697:Methane
keywords: Biogas; Co-digestion; Pig manure; Rice straw; Stability