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Electricity Enhancement by MFCs from Food Waste Ethanol Fermentation Recycle Stillage Effect of Dilution Ratio and Addition of Tween 80
Author(s) -
Gao Ming,
Li Huiyu,
Ma Hongzhi,
Peng Cheng,
Wu Wenyu,
Yu Ziqiang,
Wang Qunhui
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202000501
Subject(s) - stillage , dilution , microbial fuel cell , chemistry , fermentation , pulp and paper industry , ethanol , volume (thermodynamics) , ethanol fuel , surface area to volume ratio , food waste , food science , chromatography , waste management , chemical engineering , biochemistry , anode , electrode , physics , quantum mechanics , thermodynamics , engineering
The ethanol fermentation stillage of food waste can be used as the substrate of microbial fuel cells (MFCs), but its complexity affected the electricity production. In this study, the effect of the dilution ratio and the addition of Tween 80 on MFCs were carried out. The results showed that the maximum output power based on the cathode area and volume gradually enhanced with the increase of the dilution ratio, and the maximum output power of 612 mW m −2 and 6.4 W m −3 reached with the dilution of 200 times. The removal rate of organic acids by MFCs remained stable between 58 % and 62 %. The maximum output power of MFCs with three kinds of Tween 80 concentrations, 5 mg L −1 , 20 mg L −1 and 80 mg L −1 , increased by 2.1 times, 3.1 times and 1.4 times respectively. The addition of Tween 80 can significantly reduce the biotoxicity. With 20 mg L −1 Tween 80 added, the toxicity removal rate reached highest of 95.1 %.