橡胶工业有机废水降解微生物的驯化筛选与降解条件研究

用含M盐(2-硫醇基苯并噻唑)的橡胶工业有机废水驯化活性污泥,筛选出8株菌。纯化后进行混合培养,对其生长条件进行分析后发现:复合菌适合在30～35℃的偏碱性条件下生长,能耐受50 g/L盐度的影响。当添加葡萄糖和尿素后对复合菌生长影响较大,同时可使橡胶工业有机废水降解率分别提高18.6%和7.56%;无机离子也对复合菌的降解能力有一定的促进作用。采用综合正交试验得出:葡萄糖、尿素、菌量、转速分别为2g/L、1 g/L、20%、80 r/min为复合菌的最佳降解条件,最高降解率为68.24%,从而提高了投菌法的降解效率。

Research on acclimation and screening of microorganism for degradation of organic wastewater from rubber industry and degradation conditions thereof

8 strains of bacteria were isolated from the activated sludge acclimated by M salt(2-mercaptobenzo-thiazole)-containing organic wastewater from rubber industry.The bacteria were mixed cultivated after the purifica-tion,through analyzing their living conditions,it was found that: compound bacteria adapt to alkalescent conditon at 30-35 ℃,and tolerate 50 g/L NaCl.Adding glucose and carbamide greatly influenced the growth of the compound bacteria,and increased the degradation rate of the wastewater from rubber industry by 18.6% and 7.56% respec-tively;inorganic ions can effectively improve the performance of the compound bacteria on wastewater degradation,the results of the comprehensive orthogonal experiment showed that,the highest degradation rate of wastewater by the compound bacteria was 68.24% which could be obtained when the mass concentration of glucose,carbamide,the bacteria content,were 2 g/L,1 g/L,20% respectively,and the revolution speed was 80 r/min;the optimal condition indicated above would raise the biodegradation value of the wastewater by bacteria-throwing method.