SBR处理模拟氯苯废水

在SBR中利用光合细菌球形红细菌污泥颗粒进行模拟氯苯废水处理的初步研究,结果表明,采用球形红细菌污泥颗粒处理模拟氯苯废水的SBR系统是可行的,其降解氯苯过程符合Monod一级反应动力学方程。当进水氯苯浓度在125～187.5 mg/L变化时,处理效率都能稳定在90.5%～95.6%之间;其最佳工艺条件为反应时间6 h、DO 4.75～5.0 mg/L、沉淀时间1.5 h、污泥颗粒浓度4 000～6 000 mg/L。在污泥颗粒浓度4 000 mg/L、DO 5.0 mg/L、反应时间6 h的最佳条件下,当进水COD为748.1 mg/L、氯苯浓度100 mg/L时,COD的去除率达90.9%,处理后出水COD满足国家一级排放标准要求。

Treatment of chlorobenzene simulated wastewater by sequencing batch reactor

The chlorobenzene simulated wastewater was treated with sequencing batch reactor （SBR） filled with granular sludge of Rhodobacter sphaeroides. The results showed that the SBR system was reliable and stable. The parameters of affecting treatment efficiency were examined including chlorobenzene concentration of influent, sedimentation time, reaction time, concentration of granular sludge, concentration of dissolved oxygen, idle time. From the kinetic standpoint, the biodegradtion process of CB with SBR fit the first order equation. When chlorobenzene concentration of influent water was 125 mg/L to 187.5 mg/L, the removal rate of chlo- robenzene was 90.5% - 95.6%. The optimal conditions were the reaction time of 6 h, the sedimentation time of 1.5 h, concentration of granular sludge of 4 000 - 6 000 mg/L, DO of 4.75 - 5.0 mg/L. The re-moval rate of COD was 90.9% under the optimal conditions and chlorobenzene initial concentration of 100 mg/L. The COD of effluent water could meet the first grade discharge standard of integrated wastewater dis-charge standard GB 8978-1996.