期刊
WASTE MANAGEMENT
卷 122, 期 -, 页码 81-88出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2020.12.032
关键词
Volatile fatty acids; Electrodialysis; Food waste; Anaerobic digestion; Resource recovery
资金
- EU [730349]
- FLEXIS [WEFO 80835]
A novel method for recovering volatile fatty acids (VFAs) from a continuously-fed food waste bioreactor was developed, increasing production rates to 35 mg VFA/gVSS/day by alleviating end-product inhibition and arresting methanogenesis. The recovered VFAs were concentrated to 4000 mg/L through electrodialysis, making them suitable for use as platform chemicals with minimal refining. This represents a promising means of producing sustainable platform chemicals and also helps reduce methane emissions from bioreactors.
A novel method to recover VFAs from a continually-fed 100 L food waste bioreactor was developed using industrially applicable methods. The in-situ recovery of VFAs increased production rates from 4 to 35 mgvfa gvs(-1) day(-1) by alleviating end-product inhibition and arresting methanogenesis, and electrodialysis was able to concentrate the recovered VFAs to 4000 mg L-1. There remains considerable scope to increase the production rates and concentrations further, and the VFAs were recovered in a form that made them suitable for use as platform chemicals with minimal refining. This is the first time that continuous VFA recovery from real-world food waste has been reported at this scale with continual feeding, and represents a promising means through which to produce sustainable platform chemicals. Furthermore the production of VFAs arrests methane production in bioreactors, which is a low value product around which there is a growing concern about fugitive emissions contributing to climate change. Crown Copyright (c) 2021 Published by Elsevier Ltd. All rights reserved.
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