数字农科院2.0

The impact of immersed liquid circulation on anaerobic digestion of rice straw bale and methane generation improvement

文献类型： 外文期刊

作者： Tao Luo;Yihong Ge;Yadong Yang;Yanran Fu;Mukesh Kumar Awasthi;Junting Pan;Limei Zhai;Zili Mei;Hongbin Liu

作者机构：

关键词： Circulation rate;Ligno-cellulosic degradation;Rice straw;Solid-state anaerobic digestion;Threshold concentration

期刊名称： Bioresource Technology

ISSN： 0960-8524

年卷期： 2021 年 337.0 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： Immersed liquid circulation is assumed to improve solid-state anaerobic digestion (SS-AD) with digestate flow convection on the surface of solid-state bed (SSB), which depends on SSB concentration and circulation rate (CR). In this study, the impact of CR on rice straw SS-AD was investigated within a 30 L pilot digester. Results showed that SSB threshold concentration for efficient biogas conversion was 10%–12% TS, achieving the methane yield of 185.3 mL/g VS. Within the threshold, methane production progress and VFAs release could be enhanced simultaneously by rational CR increasing, but no significant methane yield improvement was observed; above, the rapid and stable biogas generation could be acquired with a competitive methane yield of 174.7 mL/g VS (150% CR). No matter within or above the threshold, efficient lingo-cellulosic degradation was always accompanied by the moderate CR for effective methane generation. SSB was proposed to be above threshold for industrial application. © 2021 Elsevier Ltd

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