酸改性赤泥协同吸附与电子传递强化餐厨垃圾厌氧消化的效能与机理

刘亮; 康向京; 卿梦霞; 张新锐

doi:10.13205/j.hjgc.202607011

酸改性赤泥协同吸附与电子传递强化餐厨垃圾厌氧消化的效能与机理

doi: 10.13205/j.hjgc.202607011

长沙理工大学能源与动力工程学院, 长沙 410114

基金项目:

湖南省教育厅优秀青年基金项目（25B0219）；湖南省自然资源厅科技计划项目（HBZ20240152）

详细信息

作者简介:
刘亮（1967—），男，教授，主要研究方向为生物质及固废的能源化资源化利用。liuliang_hn@163.com

通讯作者:
卿梦霞（1993—），女，副教授，主要研究方向为生物质能以及固废等资源的高效热利用与转化。qingmx@csust.edu.cn

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出版历程
- 收稿日期: 2026-02-07
- 网络出版日期: 2026-09-01

Efficiency and mechanism of enhanced anaerobic digestion of food waste by synergistic adsorption and electron transfer of acid-modified red mud

School of Energy and Power Engineering, Changsha University of Technology, Changsha 410114, China

摘要

摘要: 厌氧消化是实现餐厨垃圾能源化利用的有效途径，但常因挥发性脂肪酸（VFAs）积累导致系统酸化失稳。利用盐酸对赤泥（RM）进行改性以调节其碱性，优化其理化性质，并系统探究其作为添加剂对餐厨垃圾厌氧消化性能的强化效果与内在机理。结果表明：添加3%的AMRM能显著提升系统缓冲能力，并有效控制VFAs积累。这主要归因于AMRM发达的孔隙结构（比表面积较RM提升347%）对VFAs（尤其是丙酸）的快速吸附。同时，AMRM中富集的赤铁矿（Fe₂O₃）提高了电子传递系统（ETS）活性和辅酶F₄₂₀含量，推测其可能作为电子载体促进了互营细菌与产甲烷菌之间的直接种间电子传递（DIET）。两者协同作用下，最终甲烷产率可高达633.9 mL/g，较对照组和原始赤泥组分别显著提高175.1%与55.2%。
- 酸改性赤泥 /
- 餐厨垃圾 /
- 厌氧消化 /
- 丙酸 /
- 直接种间电子传递 /
- 吸附
Abstract: Anaerobic digestion is a common method to recover energy from food waste by turning it into methane. However， this process often becomes unstable due to the buildup of volatile fatty acids （VFAs）， which can cause the system to become too acidic. In this study， red mud （RM） was modified using hydrochloric acid to adjust its alkalinity and improve its physical and chemical properties. The modified material， referred to as AMRM， was then tested as an additive in the anaerobic digestion of food waste to evaluate its effectiveness and explore how it works.The results showed that adding 3% AMRM significantly improved the buffering capacity of the digestion system and helped control VFA accumulation. This was mainly because AMRM has a much more developed pore structure. Its specific surface area was 347% higher than that of unmodified RM， which allowed it to quickly adsorb VFAs， especially propionic acid. In addition， AMRM contained a higher amount of hematite （Fe₂O₃）. This increased the activity of the electron transport system （ETS） and the level of coenzyme F₄₂₀. The findings suggest that AMRM may act as an electron carrier， promoting direct interspecies electron transfer （DIET） between syntrophic bacteria and methanogens.As a result of these combined effects， methane production reached 633.9 mL/g VS. This was 175.1% higher than the control group and 55.2% higher than the group treated with unmodified RM.
- acid-modified red mud /
- food waste /
- anaerobic digestion /
- propionate /
- direct interspecies electron transfer（DIET） /
- adsorption

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