饮用水中摇蚊幼虫的臭氧灭活及其臭氧-活性炭工艺协同去除

进行了臭氧、二氧化氯和液氯灭活低龄期摇蚊幼虫的对比试验，对影响臭氧灭活效果的主要因素进行了考察，在此基础上，探讨了臭氧-活性炭工艺去除水中摇蚊幼虫的可行性.研究表明：与其他两种化学氧化剂相比，臭氧对滤后水中的低龄期摇蚊幼虫具有更显著的灭活作用，臭氧投加量1.0 mg•L^-1，接触25 min可以达到100%的灭活率;增加臭氧反应器水深有利于提高灭活率，在水质中性条件，COD_Mn对灭活效果影响较大.动态试验中，臭氧投加量1.0 mg•L^-1，接触11 min，臭氧对滤后水中的低龄期摇蚊幼虫可以达到100%灭活率;投加量0.8 mg•L^-1，臭氧-活性炭工艺的协同作用可以完全去除水中生物活性减低的摇蚊幼虫.

Inactivation of Chironomid larvae from drinking water by ozone and its removal using ozone-GAC process

Bench scale experiments were conducted on the inactivation of young Chironomid larvae by ozone, chlorine dioxide and liquid chlorine.Major influence factors on the inactivation effect of ozone were studied.Based on the bench scale experiment results the feasibility of young Chironomid larvae removal by the ozone-granular activated carbon (GAC) process was discussed.It was found that ozone showed better inactivation effect than other two oxidants.Complete inactivation could be reached under the condition of 1.0 mg•L^-1 of ozone with 25 min exposure.The increase in water depth of the reactor was helpful to increasing inactivation rate.COD_Mn greatly influenced inactivation rate in neutral water body.1.0 mg•L^-1 of ozone with 11 min exposure caused complete inactivation of young Chironomid larvae in filtrated water in the dynamic experiment.0.8 mg•L^-1 of ozone combined with GAC treatment was able to entirely eliminate Chironomid larvae with low activity.