COD降解菌剂的构建及在污水处理中的评估

采用微生物育种技术，从活性污泥中分离筛选得到活性菌株，结合微生物生态学原理，对高效去除污水中COD的复合菌剂构建原则进行探究。通过考察单菌的COD去除效果与絮凝效果，获得7株菌。分别在SBR和A/O模拟系统中进行验证，按COD-03比例复合时，SBR系统出水COD从300 mg·L-1降到约120 mg·L-1（进水COD 1 200 mg·L-1），较其他组具有极显著性降低（α=0.01）；A/O系统出水COD从约500 mg·L-1降到将近100 mg·L-1（进水COD 1 200 mg·L-1）。结果表明，复合菌剂构建策略具有良好的应用性和可操作性，在COD微生物增效菌剂制备方面具有良好可行性。

Construction of microbial agent for COD degradation and its evaluate in wastewater treatment

The active strains were isolated and screened from activated sludge by microbial breeding technology. The principle of construction of microbial agent for COD degradation was explored combined with microbial ecology. 7 strains were obtained by investigating the COD removal effect and flocculation effect of each single strains. The microbial agents were verified in the SBR and A/O simulation system. According to the proportion of COD-03, the SBR system effluent COD decreased from 300 mg·L-1 to about 120 mg·L-1 (inflow COD is 1 200 mg·L-1), which have a significant reduction (α=0.01) compared with other groups. Effluent COD of A/O decreased from about 500 mg·L-1 to nearly 100 mg·L-1 (inflow COD is 1 200 mg·L-1). The results well improve the operability and feasibility of construction strategy for composite agent for COD degradation.