导电材料强化微生物直接种间电子传递产甲烷的研究进展

厌氧条件下,微生物可以通过厌氧代谢产生甲烷(CH4),由此衍生的厌氧消化技术可实现能源的回收利用.产CH4的关键步骤是刺激发酵细菌和产甲烷古菌之间的有效电子转移,电活性微生物可以取代传统的氢/甲酸盐实现直接种间电子传递,其电子传递效率更高.添加导电材料可以促进直接种间电子传递并提高CH4产率,是一种更有效的强化电子传递...

Research progress on enhancement of methane production through direct interspecific electron transfer by conductive materials

Under anaerobic conditions, microorganisms produce methane (CH₄) through anaerobic metabolism. The derived anaerobic digestion technology realizes energy recovery. The key step of CH₄ production is to stimulate the effective electron transfer between fermentation bacteria and methanogens. Electroactive microorganisms can replace the traditional hydrogen/formate to achieve direct interspecific electron transfer, with higher electron transfer efficiency. The addition of conductive materials promotes direct interspecific electron transfer and increase the yield of CH₄, which is a more effective way to enhance the electron transfer. Based on the development and mechanism of direct interspecific electron transfer, carbon-based and iron-based conductive materials that promote direct interspecific electron transfer are comprehensively reviewed. The structural characteristics, electron transfer mechanism, enhanced CH₄ production and intermediate consumption by these materials are systematically summarized. This review aims to provides reference for the research of conductive materials promoting direct interspecific electron transfer, and to explore the possible research direction in future.