铁基材料强化市政污泥厌氧消化效能及机制的研究进展

Research Progress on the Efficiency and Mechanism of Iron-based Materials for Enhancing Anaerobic Digestion of Municipal Sludge

如何实现市政污泥的有效处理和资源再利用是个值得研究的问题.当前,厌氧消化处理是实现市政污泥资源化的一种有效方式.但是,受限于厌氧消化系统启动缓慢、稳定性差以及产气效率低等问题,污泥厌氧消化在实际工程应用方面面临诸多挑战.铁基材料已被证明是一种良好的促进市政污泥厌氧消化的导电材料.在前人研究的基础之上,总结了不同铁基材料对市政污泥厌氧消化的影响,同时从缓解有毒物质抑制、增强微生物代谢以及促进互营微生物之间电子传递这3个角度,梳理了铁基材料强化市政污泥厌氧消化的作用机理,阐述了铁基材料介导的微生物直接种间电子传递在强化污泥厌氧消化中的作用机制,并对铁基材料强化市政污泥厌氧消化这一研究方向进行展望.

Achieving effective treatment and resource reuse of municipal sludge is a worthwhile research issue.Currently,anaerobic digestion treatment is an effective way to achieve the resource utilization of municipal sludge.However,due to the slow start-up,poor stability and low gas production efficiency of anaerobic digestion systems,sludge anaerobic digestion faces many challenges in practical engineering applications.Iron-based material has been proven to be a good conductive material for promoting anaerobic digestion of municipal sludge.On the basis of previous studies,this article summarized the effects of different iron-based materials on anaerobic digestion of municipal sludge.Simultaneously,from the perspectives of alleviating toxic substance inhibition,enhancing microbial metabolism,and promoting electron transfer between symbiotic microorganisms,the mechanism of iron-based materials enhancing anaerobic digestion of municipal sludge was summarized.The mechanism of direct interspecific electron transfer mediated by iron-based materials in enhancing anaerobic digestion of municipal sludge was described,and the research direction of iron-based materials enhancing anaerobic digestion of municipal sludge was prospected.