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隐孢子虫是常见的球状寄生虫。接触含有隐孢子虫卵囊的水体可致隐孢子虫病,主要的临床表现为腹泻,严重者可致死。游泳池是主要的传播场所。采用容积为5 500 L的游泳池,进行隐孢子虫卵囊替代物的修复模拟实验,研究在游泳池条件下絮凝沙滤技术对直径为4.5μm隐孢子虫卵囊替代物的去除效果。实验结果表明,氯化铝剂量为0.1 mg/L,沙滤料高度为30 cm,内循环流速为11.5 L/min,对隐孢子虫卵囊替代物去除率在90%以上。该技术对浊度具有较好的处理效果,当进水浊度降低且接近于出水浊度时,系统进入稳定运行阶段,对虫卵囊替代物去除率可以达到96%。
Cryptosporidium is a common globular parasite. Contact with Cryptosporidium oocysts containing water can cause cryptosporidiosis, the main clinical manifestations of diarrhea, severe cases can be lethal. The swimming pool is the main place of communication. A 5 500 L swimming pool was used to simulate the replacement of Cryptosporidium oocysts, and the effect of flocculation and sand filtration on the replacement of Cryptosporidium oocysts with a diameter of 4.5 μm was studied. The experimental results showed that the removal rate of Cryptosporidium oocysts surrogate was more than 90% when the dosage of aluminum chloride was 0.1 mg / L, the height of sand filter was 30 cm, the internal circulation flow rate was 11.5 L / min. The technology has a good turbidity treatment effect, when the water turbidity decreases and close to the water turbidity, the system enters a stable operation stage, the removal of oocysts can reach 96% of alternatives.