Methane production and characteristics of the microbial community in the co-digestion of potato pulp waste and dairy manure amended with biochar

文献类型： 外文期刊

第一作者： Chen, Miao

作者： Chen, Miao;Liu, Shujun;Wang, Fengzhong;Xin, Fengjiao;Wen, Boting;Yuan, Xufeng;Li, Qing X.

作者机构：

关键词： Co-digestion; Potato pulp waste; Dairy manure; Biochar; Methane production; Microbial community

期刊名称：RENEWABLE ENERGY （ 影响因子：8.001； 五年影响因子：7.435 ）

ISSN： 0960-1481

年卷期： 2021 年 163 卷

页码：

收录情况： SCI

摘要： Potato pulp waste is a potential biomass material and easily acidified substrate for anaerobic digestion. The present study evaluated the methane yield and microbial community resulted from biochar amendment for the co-digestion of potato pulp waste and dairy manure at different feed-to-inoculum ratios (2:1, 1:1, 1:2, and 1:3) and potato pulp waste to dairy manure ratios (4:0, 3:1 and 1:1). The results indicated that the digesters with a high feed-to-inoculum ratio (2:1, 1:1) and without biochar lead to volatile fatty acid accumulation and process failure, whereas the addition of biochar and/or co-digestion can increase the buffer capacity and improve the digestion efficiency. The biogas and methane yields of the digesters with biochar were 1.1-2.8 and 1.4-5.3 times higher, respectively, than those without biochar. The maximum biogas and methane yields of 476 and 200 mL/g TS, respectively, were achieved with a feed-to-inoculum ratio of 1:2, potato pulp waste to dairy manure ratio of 4:0, and biochar addition. Biochar and co-digestion can also enhance the relative abundance of the bacterial community. Methanomicrobiales and Methanosaetaceae were the main methanogens present in the anaerobic digestion of PPW. This paper provides a theoretical basis of easily acidified substrates used for biogas production. (C) 2020 Elsevier Ltd. All rights reserved.

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