Research Progress on Sulfate-reducing Bacteria Using Gas as Electron Donor

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

Abstract

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

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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