Research on anaerobic fermentation and microbial community succession of food waste at intermediate temperatures

GONG Yabin; ZHAN Ouru; WU Hao; TIAN Qihuan; DU Rui; WU Dongsheng

doi:10.13205/j.hjgc.202504026

Volume 43 Issue 4

Apr. 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(4): 258-266

GONG Y B，ZHAN O R，WU H，et al.Research on anaerobic fermentation and microbial community succession of food waste at intermediate temperatures［J］.Environmental Engineering，2025，43（4）：258-266. doi: 10.13205/j.hjgc.202504026

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Research on anaerobic fermentation and microbial community succession of food waste at intermediate temperatures

doi: 10.13205/j.hjgc.202504026

1. Hangzhou Energy & Environmental Engineering Co., Ltd., Hangzhou 311106, China;
2. Zhejiang University, Hangzhou 310030, China

Received Date: 2024-04-25
Accepted Date: 2024-06-28
Rev Recd Date: 2024-06-17
Publish Date: 2025-04-01

Abstract

Abstract

Anaerobic digestion is an important technology for the harmless treatment and resource recovery of food waste.This paper focused on food waste， and explored its anaerobic fermentation process under continuous flow reaction conditions at different stages of medium temperature （MT）， intermediate temperature（IT）， and high temperature（HT）. It analyzed the succession changes of fermentation parameters and microbial communities at different stages of domestication， load increase， and high-load stable operation. The results showed that under the stable operation stage of 8 kg COD/（m³·d）， the biogas production efficiency of the IT group was significantly higher than that of the MT group and HT group. The volume gas production rate increased by more than 11%， and the biogas production rate increased by 12.53% and 9.56%， respectively. By analyzing the material parameters of each fermentation group， the VFAs / alkalinity parameters of the fermentation system in the IT group showed good buffering and loading impact resistance in the continuous operation of the system. In exploring the succession of microbial communities， the richness and diversity of the IT group were higher than that of the MT group and HT group under high organic load. Moreover， the differences in the dominant microbial community were greatly affected by temperature and organic load， and would evolve from the initially dominant acetic acidotrophic Methanosarcina to the hydrogenotrophic Methanoculleus， thereby making methane production in the system more stable.This paper further elucidated the differences in characteristics and microbial populations between intermediate-temperature and traditional medium-temperature fermentation， as well as high-temperature fermentation. It provided an efficient and stable new path for the anaerobic resource utilization of food waste and helped promote the creation of "waste-free city" in various regions of China.
- food waste,
- intermediate temperatures,
- anaerobic fermentation,
- microbial community,
- succession

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References(38)

References

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