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目的优化婴儿游泳设施水循环处理系统工艺,以保障婴儿游泳水质的卫生安全。方法以原婴儿游泳水循环处理系统[三级过滤+紫外杀菌]为参照,并设计优化系统Ⅰ[三级过滤+紫外杀菌+紫外杀菌]、优化系统Ⅱ[三级过滤+紫外杀菌+紫外杀菌+臭氧],分别对各系统内水循环处理系统的进水,紫外处理前、后端水,出水中的细菌总数、大肠菌群数、pH值、浊度、氧化还原电位(ORP)进行检测。结果原系统出水中菌落总数为1.8×105 CFU/ml,总大肠菌群为8 MPN/100 ml,不能有效杀菌;优化系统Ⅰ对菌落总数、总大肠菌群数的去除率分别为99.8%和97.1%,但仍不达标;优化系统Ⅱ对菌落总数、总大肠菌群数的去除率均达99%以上,出水氧化还原电位(ORP)值控制在250 mV以下,效果较好。三系统浊度均低于0.5 NTU,pH值略偏碱性。结论优化系统Ⅱ处理效果明显,且更具稳定性、安全性,能够作为高效节能的水处理安全系统应用于该领域。
Objective To optimize the system of water circulation treatment of baby swimming facilities to ensure the hygiene and safety of baby swimming water quality. Methods Based on the original infantile swimming water circulation system [three-stage filtration + UV disinfection], the optimal system Ⅰ [three-stage filtration + UV disinfection + UV disinfection] and the optimized system Ⅱ [tertiary filtration + UV disinfection + UV disinfection + Ozone]. The total number of bacteria, coliform bacteria, pH value, turbidity and oxidation-reduction potential (ORP) in influent, UV-treated water and effluent were measured respectively. Results The total number of colonies in the original system effluent was 1.8 × 105 CFU / ml and the total coliforms was 8 MPN / 100 ml, which could not be effectively sterilized. The removal rates of the total number of colony and total coliforms in optimized system Ⅰ were 99.8% and 97.1%, but still not up to standard. The removal rate of the total number of colony and total coliforms in the optimized system Ⅱ reached more than 99%, and the effluent oxidation-reduction potential (ORP) value under 250 mV was better. Three systems turbidity were less than 0.5 NTU, pH slightly alkaline. Conclusion The optimized system Ⅱ has obvious effect and is more stable and safe. It can be used in this field as an energy-efficient water treatment safety system.