Effects of different electricity application methods on electrochemical anaerobic digestion of food waste

ZHANG Shuang; ZHAO Pan; WANG Wanqing; WANG Nuohan; SONG Na; WANG Xiaona; WANG Qunhui

doi:10.13205/j.hjgc.202510003

Volume 43 Issue 10

Oct. 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(10): 22-29

ZHANG Shuang, ZHAO Pan, WANG Wanqing, WANG Nuohan, SONG Na, WANG Xiaona, WANG Qunhui. Effects of different electricity application methods on electrochemical anaerobic digestion of food waste[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(10): 22-29. doi: 10.13205/j.hjgc.202510003

Citation:

ZHANG Shuang, ZHAO Pan, WANG Wanqing, WANG Nuohan, SONG Na, WANG Xiaona, WANG Qunhui. Effects of different electricity application methods on electrochemical anaerobic digestion of food waste[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(10): 22-29. doi: 10.13205/j.hjgc.202510003

Citation:

ZHANG Shuang, ZHAO Pan, WANG Wanqing, WANG Nuohan, SONG Na, WANG Xiaona, WANG Qunhui. Effects of different electricity application methods on electrochemical anaerobic digestion of food waste[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(10): 22-29. doi: 10.13205/j.hjgc.202510003

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Effects of different electricity application methods on electrochemical anaerobic digestion of food waste

doi: 10.13205/j.hjgc.202510003

1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Department of Environmental Engineering, Tianjin College, University of Science and Technology Beijing, Tianjin 301830, China;
3. School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China

Received Date: 2025-03-13
Accepted Date: 2025-05-21
Rev Recd Date: 2025-04-23

Available Online: 2025-12-03

Publish Date: 2025-10-01

Abstract

Abstract

Electrochemical anaerobic digestion systems can facilitate the efficiency of anaerobic digestion of food waste， but the effect of different methods of applying electricity on anaerobic digestion is still not clear. The effects of different methods of applying electricity （constant voltage， constant current） on anaerobic digestion of food waste in an electrochemical anaerobic digestion system were investigated. The results showed that the cumulative methane production under constant voltage conditions increased by 21.43% compared with the control group. According to the results of electrochemical curves and conductive bacterial hair synthesis gene analysis， it was due to the lower internal resistance and higher charge transfer in the constant voltage group， which had a higher electron transfer efficiency， thus promoted methane production. The constant current condition inhibited the electrochemical anaerobic digestion of food waste， which was attributed to the high voltage due to continuous application of current， which adversely affected microbial growth and metabolism， leading to lower hydrolysis rates as well as electron transfer rates. The analysis of microbial community structure showed that the total relative abundance of Clostridia and Bacteroidia （hydrolyzing and acid-producing bacteria） in the constant voltage group increased by 8.55% compared to the control group， and the relative abundance of Methanomicrobia （containing numerous hydrogenotrophic methanogens） increased by 24.58%， which promoted the hydrolysis， acid production and methanogenesis reactions， and facilitated the methanogenic process of reducing CO₂ with H₂ as an electron donor. The research can provide a new reference for promoting the development of electrochemical anaerobic digestion technology and the resource utilization of food waste.
- anaerobic fermentation,
- electro-fermentation,
- methane,
- food waste,
- microbial community

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References(27)

References

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