Comparison of anaerobic co-digestion of pig manure and sludge at different mixing ratios at thermophilic and mesophilic temperatures

被引：52
|
作者：
Zhang, Qingfang [1 ]
Zeng, Liyuan [1 ]
Fu, Xin [2 ]
Pan, Feng [2 ]
Shi, Xiaofeng [3 ]
Wang, Tianfeng [1 ,2 ]
机构：
[1] Lanzhou Univ Technol, Coll Petrochem Engn, Lanzhou 730050, Peoples R China
[2] Jiujiang Univ, Jiangxi Prov Engn Res Ctr Ecol Chem Ind, Jiujiang 332005, Peoples R China
[3] Xian Sci Res Inst Environm Protect, Xian 710061, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2021年 / 337卷
基金：
中国国家自然科学基金;
关键词：
Ammonia; Ultimate methane yield; Bacterial communities; Normalized capillary suction time; TS of sediment; TOTAL SOLIDS CONTENT; SEWAGE-SLUDGE; MICROBIAL COMMUNITIES; DEWATERABILITY; SCALE; CODIGESTION; PERFORMANCE; STABILITY; YIELD;
D O I：
10.1016/j.biortech.2021.125425
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The objective of this study is to assess the effects of the mixing ratio on the methane production and digestate dewaterability of co-digestion of pig manure (P) and sludge (S). Batch experiments were carried out at five different P/S mixing ratios at mesophilic and thermophilic temperatures. Compared to sludge anaerobic digestion, co-digestion of pig manure with sludge increased methane yield 83.0%-136.5% at mesophilic temperature and 31.3%-68.0% at thermophilic temperature. The normalized capillary suction time (NCST) and total solids (TS) of sediment (centrifugal dewatering) increased when pig manure proportion of substrate increased. The NCST at thermophilic temperatures (4.87-17.58 s gxe213; 1-TSS) was higher than that at mesophilic temperatures (1.89-10.95 s gxe213; 1-TSS). However, the TS of sediment was close at thermophilic and mesophilic temperatures. The results indicated that anaerobic co-digestion of pig manure and sludge at a proper mixing ratio (P/S = 2:1) provides a good choice for energy recovery and land utilization.
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页数：8
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