Anaerobic digestion of agricultural wastes from liquid to solid state: Performance and environ-economic comparison

文献类型： 外文期刊

第一作者： Li, Yangyang

作者： Li, Yangyang;Qi, Chuanren;Zhang, Yiran;Li, Yanming;Li, Guoxue;Luo, Wenhai;Li, Yanming;Li, Guoxue;Luo, Wenhai;Wang, Yanqin

作者机构： China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Farmland Soil Pollut Prevent & Re, Beijing 100093, Peoples R China;China Agr Univ, Organ Recycling Inst Suzhou, Wuzhong Dist 215128, Jiangsu, Peoples R China;Shandong Acad Agr Sci, Coll Resource & Environm Sci, Jinan 250100, Peoples R China

关键词： Anaerobic digestion; Environ-economic analysis; Digestate nutrients; Energy efficiency; Life cycle assessment

期刊名称：BIORESOURCE TECHNOLOGY （ 2019影响因子：7.539； 五年影响因子：7.27 ）

ISSN： 0960-8524

年卷期： 2021 年 332 卷

页码：

收录情况： SCI

摘要： Performance and environ-economic impacts were compared for anaerobic digestion (AD) of dairy manure and cucumber residues from liquid to solid state. Environ-economic evaluation of the overall AD process at different total solids (TS) was performed with the estimated treatment capacity of 9600 tons/year and service life of 20 years. Results showed that TS increase from 6% to 22% enhanced both cumulative and volumetric methane (CH4) production. Further TS increase to 25%, however, reduced CH4 yield. Environ-economic assessment indicated that TS increase enhanced volumetric waste treatment capacity and thus AD environmental footprints. Environmental credits from digestate and biogas utilization could compensate the adverse environmental impacts of other processes in AD plants. Furthermore, biogas and nutrients in digestate determined AD net-present value. As a result, solid state AD was more profitable with higher CH4 yield and more nutrients in both biosolids and digested effluent of digestate than its liquid and hemi-solid counterparts.

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