臭氧-生物活性炭与超滤膜联用技术试验研究

Experimental investigation of the complex technology of ozone-biological activated carbon and ultrafiltration

为解决南方河网地区高温、高藻期臭氧-生物活性炭(O3-BAC)工艺出厂水中细菌超标和活性炭颗粒随水流泄漏等生物安全性问题,进行了超滤膜(UF)工艺作为臭氧-活性炭出水的安全保障技术的试验研究.结果表明:超滤膜工艺出水高锰酸盐指数(CODMn)和溶解性有机碳(DOC)的平均质量浓度为2.31 mg/L和3.53 mg/L,UV254吸光度平均值为0.043 cm-1,浊度平均值为0.06 NTU,颗粒数中粒径大于2μm的平均含量为11/mL,藻类平均数量为1.83×104/L,臭氧-活性炭出水中滋生的细菌完全被超滤膜工艺去除;由于超滤膜进水经常规工艺和臭氧-活性炭工艺的处理,增加了超滤膜周期的过滤时间,减少了水力冲洗水量,因此超滤膜的产水率提高到98.02%.

In order to solve the problems that bacteria concentration exceeded the standards and the biological activated earbon（BAC） particles leaked from the treatment plant in the algae bloom period at the dense river networks in South China. Ultrafiltration membrane（UF） was used to insure the effluent water quality of the BAC pool. The results of water quality of UF membrane effluent showed： the average CODMn,DOC,UV254 ,turbidity and alge were 2.31 mg/L,3.53 mg/L,0. 053 cm^-1 ,0.06 NTU and 1.83 × 10^4/L, where the particles with diameter bigger than 2 μm were 11/mL. The bacteria generated in the BAC pool were completely removed by the UF membrane. Due to the pretreatment of influent of the UF membrane by conventional and O3-BAC process, the filtration cycle time increased and the volume of hydraulic backwash water decreased. The water production rate of the UF membrane was 98.02 %.