中置活性炭滤池工艺消毒副产物的控制

CONTROL OF DBPs IN THE MID-POSITIONING ACTIVATED CARBON FILTER PROCESS

中置活性炭滤池采用不同消毒工艺进行试验,考察其对出水消毒副产物的控制情况。结果表明,预臭氧投加量过大可能导致消毒副产物超标。在预臭氧投加量为0.3 mg/L时,后续处理采用中置曝气活性炭滤池,在砂滤池前加氯,可保证出水消毒副产物满足要求。当耐氯性微型水生动物难以控制时,可采用后臭氧消毒,臭氧投加量在1.0mg/L内,同时砂滤池后投加氯辅助消毒,既能控制消毒副产物,又可保证管网水质生物稳定性。

Different disinfection process was performed on mid-positioning activated carbon filter to investigate the removal of DBPs.The results show that the excessive preozone dosage may lead to exceed standard of DBPs.Under a preozone dosage of 0.3 mg/L and chlorination disinfection before sand filter,it can ensure that the effluent DBPs meet the requirement of standard.When the chlorine tolerance of aquatic micro-animals are hard to control,the post-ozonation disifection process could be adopted,with an ozone dosage within 1.0 mg/L and certain chlorine after the sand filter,which could both control DBPs and guarantee the network water safety.