Effect of hydraulic retention time on anaerobic co-digestion of cattle manure and food waste

被引：87

作者：

Bi, Shaojie ^{[1
]}

Hong, Xiujie ^{[2
]}

Yang, Hongzhi ^{[3
]}

Yu, Xinhui ^{[1
]}

Fang, Shumei ^{[1
]}

Bai, Yan ^{[1
]}

Liu, Jinli ^{[1
]}

Gao, Yamei ^{[1
]}

Yan, Lei ^{[1
]}

Wang, Weidong ^{[1
]}

Wang, Yanjie ^{[1
]}

机构：

[1] Heilongjiang Bayi Agr Univ, Coll Life Sci & Technol, Heilongjiang Prov Key Lab Environm Microbiol & Re, Daqing 163319, Peoples R China

[2] Minist Agr, Commiss Agr Daqing City, Daqing 163311, Peoples R China

[3] Heilongjiang Bayi Agr Univ, Coll Food Sci, Daqing 163319, Peoples R China

来源：

RENEWABLE ENERGY | 2020年 / 150卷

关键词：

Cattle manure; Food waste; Hydraulic retention time; Microbial structure; Biogas generation; MICROBIAL COMMUNITY STRUCTURE; CHICKEN MANURE; METHANE PRODUCTION; DAIRY MANURE; BIOGAS PRODUCTION; BATCH; PERFORMANCE; CELLULOSE; DYNAMICS; AMMONIA;

D O I：

10.1016/j.renene.2019.12.091

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Anaerobic digestion of cattle manure has a low efficiency due to the high hydraulic retention time (HRT) required to degrade the abundant degradation-resistant compositions, co-digestion with food waste is effective at improving the methane production. Lowering the HRT can therefore increase the methanogenic efficiency during co-digestion. This study considered the effects of different HRTs (25, 20,15,10, 7, 5, and 4 days) on cattle manure and food waste co-digestion. The highest methane production was achieved at 1.48 Mid with an HRT of 5 days. The maximum methane yields (236-257 mL/g-VS) were attained at HRT >= 15 days and decreasing the HRT to 10-5 days resulted in low methane yields and complete process failure at HRT 4 days, due to volatile fatty acids accumulated and microorganisms washed out. From a high HRT of 20 days to a low HRTs of 5 days, Bacteroidetes and Firmicutes were the dominant bacteria and the percentage of syntrophic acetate oxidizing bacteria (mainly Pelotomaculum and Pseudotherrnotoga) clearly increased. The dominant methanogen changed from the acetotrophic Methanosaeta to the hydrogenophilic Methanobrevibacter. These results enable biogas plants to utilize surplus amounts of cow manure and food waste in a sustainable manner with high process capacity and methane recovery. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页码：213 / 220

页数：8

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