降解水体中六六六低温复合菌的筛选

在低温条件（≤9 ℃）下, 对实验室已有降解有机污染物的12种菌进行对比实验, 筛选出3种降解六六六的有效菌, 同时利用正交试验确定了3种单菌的最佳降解条件, 并在同一条件(pH=6.5, 碳氮源为0.8 g/L NH₄Cl和0.6 g/L KH₂PO₄)下, 将驯化后的3种单菌按C²₃和C³₃组合, 进行复合菌的降解效果实验. 结果表明, C³₃组合后的复合菌对六六六的降解效率均高于单菌和C²₃组合后的复合菌, 且最高降解率发生在1号菌、 2号菌和3号菌的投加量之比为1 ∶5 ∶3时, 达到63.27%.

Selection of Mixed Microorganisms at Low Temperature for Degrading Hexachlorocyclohexane in Wastewater

At a low temperature (≤9 ℃), comparison experiments of 12 original strains of degrading organic pollutants were made in the laboratory. Three strains which can degrade BHC effectively were screened out, moreover, the optimal degradation conditions of the three strains were got though the orthog onal experiments. Furthermore, under the same degradation conditions (pH=65, 0.8 g/L NH ₄Cl, 0.6 g/L KH₂PO₄), degradation experiments were carried out by mixing the three strains, which were domesticated, in C²₃ and C³₃ ways, and the result shows that the C³₃ mixed strains had higher degradation rate of BHC than each of the three strains and the C²₃ mixed strains. The highest degradation rate was got when the incubation amounts of 1st stain, 2nd stain an d 3rd were at the ratio of 1 ∶5 ∶3, which was 63.27%.