Intermittent air mixing system for anaerobic digestion of animal wastewater: Operating conditions and full-scale validation

被引：4
|
作者：
Yang, Hongnan [1 ,2 ]
Deng, Liangwei [1 ,2 ]
Wu, Jianwang [3 ]
Wang, Wenguo [1 ,2 ]
Zheng, Dan [1 ,2 ]
Wang, Zhiyong [1 ,2 ]
Liu, Yi [1 ,2 ]
机构：
[1] Minist Agr & Rural Affairs, Biogas Inst, Chengdu 610041, Peoples R China
[2] Minist Agr & Rural Affairs, Key Lab Dev & Applicat Rural Renewable Energy, Chengdu 610041, Peoples R China
[3] Shijiazhuang Chengding Environm Protect Technol C, Shijiazhuang 050000, Hebei, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2021年 / 335卷
基金：
中国国家自然科学基金;
关键词：
Air mixing; Anaerobic digestion; Effective methane production time; Mixing time; Swine wastewater; COMPUTATIONAL FLUID-DYNAMICS; CO-DIGESTION; METHANE PRODUCTION; GREENHOUSE GASES; BROWN WATER; FLOW; MODE; FERMENTATION; PRETREATMENT; CONSUMPTION;
D O I：
10.1016/j.biortech.2021.125304
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
An air mixing system for anaerobic digestion has been proved to be beneficial for methane production. The aim of the present study was to further investigate the appropriate conditions for air mixing. The effective methane production time (EMPT) was defined to determine the air mixing time in the article. The results indicated that the appropriate aeration intensity was 66.7 mL air per volume of reactor per min and mixing time was 1.5 min. When air mixing time exceeded 3 min on each occasion, total CH4 production was less than that achieved under the no mixing condition due to a decrease in the EMPT. In addition, the possibility of air mixing was evaluated in an anaerobic full-scale plant comprising a continuous stirred tank reactor. One year of operating data validated the feasibility of air mixing during the anaerobic digestion of swine wastewater.
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页数：7
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