期刊
BIORESOURCE TECHNOLOGY
卷 347, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.126310
关键词
pH; HRT; Acidogenic fermentation; Microbial community; Interactive correlation
资金
- National Natural Science Foundation of China [52070176, 21876167, 51678553]
- Interdisciplinary platform for ecological civilization, Major Innovation & Planning Interdisciplinary Platform for the Double-First Class Initiative, Renmin University of China
- Opening Project of the key Laboratory of Energy Utilization of Agricultural Wastes of the Ministry of Agriculture and Villages [KLERUAR2020-01]
The study showed that regulating pH and hydraulic retention time influenced the production of volatile fatty acids, providing guidance for enhancing targeted VFAs products through optimizing operational parameters or bio-augmentation.
Enriching suitable fermentative products by optimizing operation conditions could effectively improve the ef-ficiency of anaerobic digestion. In the present study, pH (5.0-6.0) and hydraulic retention time (HRT) (2 h-12 h) were regulated for volatile fatty acids (VFAs) production during glucose fermentation in acidogenic continuous stirred tank reactor (CSTR). Results showed that acetate and butyrate dominated during pH regulation. HRT reduction favored butyrate production and formate retainment. Maximum total VFAs production with highest acetate content was achieved at pH of 6.0 and HRT of 6 h. Microbial analysis revealed that Clos-tridium_sensu_stricto_1 was predominant butyrate producer during pH regulation, and Bacteroides was main contributor when HRT shorter than 6 h. In addition to acetyl-CoA pathway, acetate could also be produced via homoacetogenesis by Parabacteroides, UCG-004 and norank_f__Acidaminococcaceae. These results would give guidance for enhancing targeted VFAs products by optimizing operational parameters or bio-augmentation with specific bacteria.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据