电子供体在2，4，6-三氯酚和硫酸盐同时降解中的作用

在不少工业废水中，往往同时存在2，4，6-三氯酚（TCP）和硫酸盐等污染物。生物还原法是一种有效的方法，能同时去除水中的这些污染物。采用了丙酮酸（C₃H₄O₃）作为外源电子供体还原TCP和硫酸盐。当单独还原TCP或硫酸盐时，它们的还原速率随着C₃H₄O₃加入量的增加而增加。当TCP与硫酸盐共存时，加入相同量的C₃H₄O₃，由于TCP与硫酸盐还原菌对电子的竞争作用，导致它们的还原速率均有所降低。当C₃H₄O₃进一步增加时，这种对电子的竞争情况可以得到缓解。

The role of electron donor in simultaneous degradation of 2,4,6-trichlorophenol and sulfate

It is common that industrial wastewater contains 2,4,6-trichlorophenol(TCP) and sulfate simultaneously.Biological reduction is an effective method to remove the pollutants in the wastewater simultaneously.Pyruvic acid was used as an external electron donor to reduce TCP and sulfate in this work.TCP and sulfate removal rates increased with the increase of pyruvic acid added when they were biodegraded alone.TCP and sulfate removal rates decreased with the same amount of pyruvic acid added when they were biodegraded simultaneously,due to the competition for electron donor between TCP and sulfate-degrading bacteria. The competition for electrons could be relieved when the amount of pyruvic acid was further increased.