硫酸盐累积对烟气脱硫菌氧化活性影响的研究

Study on Effect of Accumulation of Sulfates on Oxidation Activity of FGD Bacteria

为了考察硫酸盐累积对烟气脱硫菌氧化活性的影响,实验测定了氧化亚铁硫杆菌菌液浓度、Fe^(2+)、SO_4^(2-)、p H和电导率的变化,实验结果表明:当Fe^(2+)和S^(2-)同时存在时,氧化亚铁硫杆菌首先利用Fe2+获得自身生长所需能量,S^(2-)大部分S^(2-)被氧化为S单质,之后S^(2-)被氧化为S_2O_3^(2-),生成SO_3^(2-)进一步被氧化成SO_4^(2-)。氧化亚铁硫杆菌对盐分的耐受值为13450μs/cm。

To investigate the accumulation of sulfate which would have effects on the oxidation activity of Ferrooxidans, the concentration, Fe^2＋ , SO4^2-, pH and conductivity of bacteria were measuring The results show that Ferrooxidans firstly take advantage of Fe^2＋ when Fe^2＋ and S^2- are both contained by the medium. In the oxidation process of S^2-, S2O3^2- are accumulated sparingly. With the increasing of bacteria concentration, S2O3^2- are turned into SO4^2-. The upper limit to salinity of Ferrooxidans is 13450 μs/cm.