摘要：This paper is aimed to investigate the oxidation ability of the bacteria (Thiobacillus thioparus, Z-2) and thebiological oxidation mechanism and oxidation kinetics on the reduced inorganic sulphuric compounds insodium-process desulphurization wastewater. Results showed that the Z-2 bacteria have high oxidationactivity in the high-salt environment after acclimation, and the oxidation percentage of reduced inorganicsulphuric compounds reached 95% and the chemical oxygen demand (COD) reduced from 18000mg/L to2000 mg/L in the high-salt environment. This showed that the Z-2 bacteria have strong salt resistance andhigh oxidation activity. In addition, ion chromatography analysis confirmed that Z-2 bacteria were beneficialfor the oxidation of reduced sulphur. A biological oxidation model was constructed by measuring the enzymeactivity of the oxidation process. The results indicated that direct and indirect oxidation processes were bothinvolved in biological oxidation. The kinetic parameters of V max (21.38 µM/min) and K m (79.04 µM) wereobtained through biological oxidation kinetic experiments.
