期刊
JOURNAL OF CLEANER PRODUCTION
卷 207, 期 -, 页码 483-489出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2018.10.019
关键词
Acetate; Anaerobic digestion; Applied current; Electrodialysis; Medium; Propionate
资金
- National Natural Science Foundation of China [51408530, 51808120]
- Central Guidance on the Development of Local Science and Technology (Fujian) [2017L3003]
- Foundation of Hebei Education Department [BJ2017014]
The accumulation of volatile fatty acids (VFAs) lowers anaerobic digestion (AD) performance. In this study, electrodialysis (ED) was coupled with AD to remove VFAs. The results show that acetate and propionate were removed once the current was applied during ED even in the presence of medium. However, current efficiency was <70%. Energy consumption was higher under a lower VFA concentration, and the maximum value reached 46.0 kW h/kg-acetate. Ethanol diffusion was not detected during laboratory-scale ED. The acetate removal percentage was about 40% in the ED-AD system, which was much faster than that of AD. However, the applied current significantly reduced bacterial activity, and no methane production was detected during the 50 days after the ED experiment. Therefore, separating the anaerobes from the fermentation broth before ED is necessary to maintain bacterial activity during AD. (C) 2018 Elsevier Ltd. All rights reserved.
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