EFFECT OF ELECTRO-FERMENTATION ON HIGH TEMPERATURE ANAEROBIC DIGESTION OF FOOD WASTE AND SPENT MUSHROOM SUBSTRATE

SONG Na; ZHAO Pan; GUAN Weijie; CHEN Liwei; ZHANG Shuang; WANG Qunhui

doi:10.13205/j.hjgc.202307020

Volume 41 Issue 7

Jul. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(7): 145-149

ZHOU Ziyan, HUANG Xiang, GU Jinchuan, XUE Jia, WU Yi, YONG Yi. PASSIVATION OF ZINC, LEAD AND CADMIUM CONTAMINATED SOIL BY INORGANIC SALT MODIFIED BENTONITE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(7): 150-158. doi: 10.13205/j.hjgc.202307021

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SONG Na, ZHAO Pan, GUAN Weijie, CHEN Liwei, ZHANG Shuang, WANG Qunhui. EFFECT OF ELECTRO-FERMENTATION ON HIGH TEMPERATURE ANAEROBIC DIGESTION OF FOOD WASTE AND SPENT MUSHROOM SUBSTRATE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(7): 145-149. doi: 10.13205/j.hjgc.202307020

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EFFECT OF ELECTRO-FERMENTATION ON HIGH TEMPERATURE ANAEROBIC DIGESTION OF FOOD WASTE AND SPENT MUSHROOM SUBSTRATE

doi: 10.13205/j.hjgc.202307020

1. Department of Environmental Engineering, Tianjin College, University of Science and Technology Beijing, Tianjin 301830, China;
2. Department of Environmental Engineering, College of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2022-10-16

Abstract

Abstract

In order to improve the methane production performance of food waste and spent mushroom substrate high temperature co-digestion, we set four fermentation groups:control, electro-fermentation, activated carbon, and electro-fermentation+activated carbon. By comparing the cumulative methane yield, electrochemical characteristics, and the stability of anaerobic digestion system, we studied the effects of electro-fermentation and the addition of activated carbon on high-temperature anaerobic co-digestion of food waste and spent mushroom substrate. The results showed that, compared with the control group, the cumulative methane production of electro-fermentation, activated carbon, and electro-fermentation+activated carbon groups increased by 6.2%, 7.6% and 21.9%, respectively; meanwhile, the biodegradability increased by 6.4%, 7.6% and 16.9%, respectively, indicating that electro-fermentation and addition activated carbon could synergistically promote gas production. Both the application of a weak electric field and the addition of activated carbon can reduce the concentration of free ammonia (FAN), and accelerate the transformation and degradation of VFAs by methanogens. The reduction of methanogenic bacteria activity caused by the accumulation of FAN and VFAs in the fermentation system was alleviated. In addition, electro-fermentation, electro-fermentation+activated carbon groups had obvious REDOX peak in the volt-ampere characteristic curve, further illustrating that a weak electric field and adding activated carbon could promote cell proliferation and the electron transfer process, accelerate electrochemical REDOX reaction, and enhance the stability of anaerobic digestion system and the target product yield. This study provides a scientific basis for promoting the development of new cross-research directions of microbiology and electrochemistry, and new ways to food waste resource utilization.
- food waste,
- spent mushroom substrate,
- electro-fermentation,
- thermophilic anaerobic fermentation,
- activated carbon

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References(19)

References

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