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Title	Bioconversion of food waste to volatile fatty acids: Impact of microbial community, pH and retention time
ID_Doc	7745
Authors	Khatami, K; Atasoy, M; Ludtke, M; Baresel, C; Eyice, Ö; Cetecioglu, Z
Title	Bioconversion of food waste to volatile fatty acids: Impact of microbial community, pH and retention time
Year	2021
Published
Abstract	Bio-based production of materials from waste streams is a pivotal aspect in a circular economy. This study aimed to investigate the influence of inoculum (three different sludge taken from anaerobic digestors), pH (5 & 10) and retention time on production of total volatile fatty acids (VFAs), VFA composition as well as the microbial community during anaerobic digestion of food waste. The highest VFA production was similar to 22000 +/- 1036 mg COD/L and 12927 +/- 1029 mg COD/L on day 15 using the inoculum acclimated to food waste at pH 10 and pH 5, respectively. Acetic acid was the dominant VFA in the batch reactors with initial alkaline conditions, whereas both propionic and acetic acids were the dominant products in the acidic condition. Firmicutes, Chloroflexi and Bacteroidetes had the highest relative abundance in the reactors. VFA generation was positively correlated to the relative abundance of Firmicutes. (C) 2021 The Author(s). Published by Elsevier Ltd.
PDF	https://doi.org/10.1016/j.chemosphere.2021.129981

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