采用不同消毒技术去除饮用水中病毒的工艺研究

Research on Removal and Inactivation of Viruses by Drinking Water Treatment Processes with Different Disinfectants

建立一套流程为进水——混凝/沉淀——砂滤——消毒——出水的饮用水生产系统。通过向系统进水中投加高浓度的病毒指示物MS2噬菌体悬浮液进行实验,分别研究了采用氯和臭氧消毒时系统整体对病毒微生物的去除灭活性能。结果表明:当投氯浓度为0.5 mg/L或臭氧浓度为0.25 mg/L时,系统对MS2的去除率即可达到美国环保总署标准。而当投氯浓度增大至2.0 mg/L或臭氧浓度增大至1.0 mg/L时,可实现系统出水中无MS2检出。综合两种消毒剂的特点,建议在实际生产中可采用主臭氧消毒与余氯补充的联合消毒方式,以保障饮用水的化学和微生物学的安全性。

A pilot scale test facility consisted of influent, coagulation/sedimentation, sand filtration, disinfection and effluent was established in the present study. The effect of ozonation or chlorination on removal and inactivation of viruses by the drinking water treatment system was investigated by addition of coliphage MS2 in influent tank. The results indicated that when the dose of chlorine was 0.5 mg/L or ozone was 0.25 mg/L, the total removal and inactivation of coliphage MS2 by the system achieved the USEPA standard. When the dose of chlorine increased to 2.0 mg/L or ozone increased to 1.0 mg/L, there was no coliphage MS2 be detected in effluent. According to the characteristics of these two disinfectants, it is recommended that the combined disinfection process of ozonation and chlorination be conducted in drinking water plant to guarantee the chemical and virological safety of drinking water.