Performance of dry anaerobic technology in the co-digestion of rural organic solid wastes in China

Tianxue Yang, Yingjun Li, Jixi Gao, Caihong Huang, Bin Chen, Lieyu Zhang, Xiaowei Wang, Ying Zhao, Beidou Xi and Xiang Li

Energy, 2015, vol. 93, issue P2, 2497-2502

Abstract: The dry anaerobic co-digestion of LW (livestock waste), OFHW (organic fraction of household waste), and AR (agricultural residue) was evaluated in terms of pH stability, organic removal rate, and methane yield. The total quantity of the solids involved in the digestion was adjusted to 25%. All the reactors were inoculated by 20% (in dry weight) of the municipal sludge. The dynamic changes in the pH values of the LW-AR-OFHW mixture co-digestions underwent four stages and differed from those of wet anaerobic digestion. The decrease in VS (volatile solids), volume, and weight of the LW-AR-OFHW mixtures was higher than those in AR and OFHW. The VS, volume, and weight reductions in LW-AR-OFHW co-digestion were 54.7%, 82.2%, and 72.7%, respectively. However, the VS, volume, and weight reductions in AR were only 11.1%, 20.5%, and 19.8%, respectively, and those in OFHW were only 27.4%, 45.0%, and 40.9%, respectively. The LW-AR-OFHW mixture co-digestions enhanced the methane production of the co-digester (256 m3/ton VS), whereas AR and OFHW produced only 12 and 93 m3 methane/ton VS, respectively.

Keywords: Dry anaerobic co-digestion; Rural organic solid waste; Multiple wastes (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (8)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:93:y:2015:i:p2:p:2497-2502

DOI: 10.1016/j.energy.2015.10.014

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