纳米半导体材料促进厌氧产甲烷过程的研究进展

Recent advances in promotion of anaerobic methanogenesis by nano-semiconductor materials

厌氧产甲烷既能保持碳通量又能有效转化能源,但其过程效率较低和底物利用率低制约了其发展。将纳米半导体材料介入到厌氧消化体系中,能加快产甲烷速率,提高甲烷产量。本文综述了纳米半导体材料介入厌氧产甲烷过程机理的研究进展,概括了不同纳米半导体材料对厌氧产甲烷效率及其过程的影响情况,基于优化微生物群落、促进直接种间电子传递(DIET)和改善胞外聚合物(EPS)3个方面探讨了纳米半导体材料促进厌氧产甲烷的机制,阐述了纳米半导体材料的特性与促进厌氧产甲烷之间的关系,提出了纳米半导体材料促进厌氧产甲烷过程所面临的挑战,展望了该领域的发展趋势。

Anaerobic methanogenesis has advantages of maintaining carbon flux and transforming energy effectively.However,due to the low-efficiency process and the low substrate utilization rate,the development of anaerobic methanogenesis is restricted.With the nano-semiconductor in the anaerobic system,the methane production rate and yield can be promoted.This paper overviews the research progresses on effect mechanism of nano-semiconductor nanomaterials in the anaerobic methanogenesis,summarizes the effects of nano-semiconductor materials on production efficiency and process of anaerobic methanogenesis.The promotion mechanism of semiconductor materials on the systemis discussed based on 3 aspects,such as:optimization of microbial communities,promotion of direct interspecific electron transfer(DIET)and improvement of extracellular polymers(EPS).The relationship between the characteristics of nano-semiconductor materials and promotion of anaerobic methanogenesis process is discussed.At last,current challenges existing for promoting anaerobic methanogenesis by nano-semiconductor materials and the development direction of this field in the future are proposed.