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以向地表水中投加的隐孢子虫微球和贾第鞭毛虫微球为对象,研究通过对给水混凝工艺对其的去除效果进行比较,着重考察了不同混凝剂种类、投加量及水样pH值对去除效果的影响。结果表明,混凝工艺可较为有效地去除地表水中的两虫微球,去除率最高可达4 lg。相比常规的金属盐类混凝剂,高分子的PAC、PAFC混凝剂对两虫微球的混凝去除率更高;投加量为40~70 mg/L,pH为8时,PAC对两虫微球去除的效果最佳;投加量为20~70 mg/L,pH为6~8时,PAFC对两虫微球去除的效果最佳,而硫酸铝、硫酸铁、氯化铁的效果相对稍差。整体上PAC、硫酸铝等铝盐混凝剂对贾第鞭毛虫微球的去除率高于隐孢子虫微球的去除率,而PAFC、硫酸铁等含铁盐对隐孢子虫微球的去除率高于贾第鞭毛虫微球的去除率;铝盐混凝剂对两虫微球的整体去除率高于铁盐混凝剂。
In order to add the Cryptosporidium microspore and Giardia microspheres added to the surface water, the effects of the coagulation process on water removal and coagulation were compared, and the effects of different coagulant types, dosage, Effect of water sample pH on removal efficiency. The results show that the coagulation process can be more effective in removing surface water two worm microspheres, the removal rate of up to 4 lg. Compared with the conventional metal salt coagulant, the polymer coagulant PAC and PAFC coagulant removal rate of the two worm microspheres is higher; dosage of 40 ~ 70 mg / L, pH 8, the PAC The results showed that PAFC had the best removal effect on the two microspheres when the dosage was 20-70 mg / L and the pH was 6-8. However, the effect of PAFC on the removal of microspheres was the best, while aluminum sulfate, ferric sulfate, The effect of iron is relatively less. Overall PAC, aluminum sulfate and other aluminum salt coagulant on the giardiasis microspheres removal rate higher than that of Cryptosporidium microspheres removal rate, and PAFC, ferric sulfate and other iron salts on the removal of Cryptosporidium microspheres Rate higher than the rate of giardia microspheres removal; aluminum coagulant on the two worm microspheres overall removal rate higher than the iron salt coagulant.