数字农科院2.0

Instability Mechanisms And Early Warning I.ndicators For Mesophilic Anaerobic D igestion Of Vegetable Waste

文献类型： 外文期刊

作者： Li, D; Chen, L; Liu, XF; Mei, ZL; Ren, HW; Cao, Q; Yan, ZY

作者机构：

关键词： Vegetable waste; Anaerobic digestion; Early warning; Instability mechanisms; Indicators

期刊名称： BIORESOURCE TECHNOLOGY

ISSN： 0960-8524

年卷期： 2017 年 245 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： In order to elucidate the instability mechanism, screen early warning indicators, and propose control measures, the mesophilic digestion of vegetable waste (VW) was carried out at organic loading rates (OLR) of 0.5, 1.0, and 1.5 g volatile solid (VS)/(L d). The process parameters, including biogas components, volatile fatty acids (VFA), ammonia, pH, total alkalinity (TA), bicarbonate alkalinity (BA), and intermediate alkalinity (IA), were monitored every day. Digestion was inhibited at OLR of 1.5 g VS/(L d). The primary causes of instability are a high sugar and negligible ammonia content, in addition to the feed without effluent recirculation, which led to BA loss. The ratios of CH4/CO2, VFA/BA, propionate, n-butyrate and iso-valerate were selected as early warning indicators. In order to maintain the digestion of VW at a high OLR, control measures including effluent recirculation and trace element addition are recommended.

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