Combined effect of crude fat content and initial substrate concentration on batch anaerobic digestion characteristics of food waste

文献类型： 外文期刊

第一作者： Zhang, Wanqin

作者： Zhang, Wanqin;Dong, Hongmin;Zhang, Wanqin;Li, Xin;Dong, Renjie;Lang, Qianqian;Fang, Ming;Bah, Hamidou

作者机构：

关键词： Food waste;Anaerobic digestion;Crude fat content;Initial substrate concentration;Kinetic study

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The mesophilic anaerobic digestion (AD) characteristics of food waste (FW) with different crude fat (CF) contents and four initial substrate concentrations (4, 6, 8, and 10 gVS/L) were investigated. The maximum methane yields of FW with CF contents of 15%, 20%, 25%, 30%, and 35% were 565.0, 580.2, 606.0, 630.2 and 573.0 mL CH4/gVS(added), respectively. An acidification trend with a drop in pH (<6.80) and increase in the volatile fatty acids/total inorganic carbon (VFAs/TIC) ratio (>0.4) were found for CF contents of 30% (10 gVS/L) and 35% (8 and 10 gVS/L). A 35% CF content in FW led to decrease in the first-order degradation constant of approximately by 40%. The modified Gompertz model showed that the lag phase (lambda) was prolonged from 0.4 to 7.1 days when the CF content in FW and initial substrate concentration were increased to 35% and 10 gVS/L. (C) 2017 Elsevier Ltd. All rights reserved.

分类号： Q

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