气体作为电子供体的硫酸盐还原菌研究进展

doi:10.13560/j.cnki.biotech.bull.1985.2019-0592

摘要/Abstract

摘要： 硫酸盐还原菌（Sulfate-reducing bacteria,SRB）在处理含硫酸盐废水具有显著优势,但其代谢过程需要电子供体的支撑。常用的有机电子供体（如乳酸盐、乙醇等）,SRB短时间内不可将其完全转化,导致出水残存COD高等问题,需后续深度处理。气体（H₂、CO₂和CO）作为SRB代谢过程的电子供体,具有单位质量电子供量大、出水残余有机物浓度低等优点而受到持续关注。主要围绕SRB利用气体作为电子供体的反应机理、影响因素（环境因子、气体传质、涉硫组分和供体竞争）、气体特性及代谢转化开展综述,并提出生化处理工程应用中亟待解决的难题,如难溶性气体传质效率、毒性气体（CO）的抑制解除、生物高效增殖及代谢活性保持等,以期为后续研究奠定相应的基础。

关键词: H₂/CO₂, CO, 硫酸盐还原菌, 电子供体

Abstract: Sulfate-reducing bacteria（SRB）demonstrate significant advantages in the treatment of sulfate-containing wastewater,but their metabolic processes require the support of electron donors. Ordinary organic electron donors（such as lactate,ethanol,etc.）cannot be completely converted by SRB in a short time,leading to high residual COD in effluent,which needs further treatment. The gases（H₂,CO₂,and CO）as the electron donors in SRB metabolic process have received continuous attentions duo to their advantages of large electron supply per unit mass and low residual organic concentration in effluent. This review focuses on the reaction mechanism,influencing factors（environmental factor,gas mass transfer,sulfur-related component,and donor competition）,gas characteristics,and metabolic transformation of SRB while using gas as electron donor,and put forward to some problems that need to be solved in the application of biochemical treatment engineering,such as the mass transfer efficiency of insoluble gas,inhibition and removal of toxic gas（CO）,high biological proliferation,maintenance of metabolic activity,etc.,aiming at providing corresponding foundation for subsequent research.

Key words: H₂/CO₂, CO, sulfate-reducing bacteria, electron donor

祝传静, 李柳青, 黄建洪, 田森林, 胡学伟. 气体作为电子供体的硫酸盐还原菌研究进展[J]. 生物技术通报, 2019, 35(9): 53-60.

ZHU Chuan-jing, LI Liu-qing, HUANG Jian-hong, TIAN Sen-lin, HU Xue-wei. Research Progress on Sulfate-reducing Bacteria Using Gas as Electron Donor[J]. Biotechnology Bulletin, 2019, 35(9): 53-60.

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