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通过中试实验研究了混凝沉淀-超滤、混凝沉淀-砂滤-超滤和混凝沉淀-升流式曝气生物活性炭-超滤三种工艺处理饮用水的净水效果及对膜污染影响情况。结果表明,3种工艺的浊度和颗粒数去除率均能达到99%以上且不受原水水质影响,都能去除水中大多数的微生物和浮游动物,说明超滤膜组合工艺能有效的保证出水的生物安全性。超滤膜本身对水中溶解性有机物和氨氮的去除效果较差,相对于混凝沉淀-超滤工艺,选用混凝沉淀-砂滤-超滤工艺和混凝沉淀-升流式曝气生物活性炭-超滤工艺对COD_(Mn)、UV_(254)及氨氮的去除率分别提高了21.2%、18.2%、28.6%和40.8%、63.7%、59.2%,且这两种工艺的过滤阻力也远小于混凝沉淀-超滤工艺的过滤阻力。
The effect of coagulation and sedimentation-ultrafiltration, coagulation-sedimentation-sand filtration-ultrafiltration and coagulation-sedimentation-upflow aeration bio-activated carbon-ultrafiltration process on the water purification effect of drinking water Pollution impact. The results showed that the turbidity and the number of particles removal rate of the three processes can reach more than 99% and are free from the impact of raw water quality, can remove most of the microorganisms and zooplankton in water, indicating that ultrafiltration membrane combination process can effectively ensure that the water Biosecurity. The ultrafiltration membrane itself has poor effect on the removal of dissolved organic matter and ammonia nitrogen in the water. Compared with the coagulation-sedimentation-ultrafiltration process, the coagulation-sedimentation-ultrafiltration process and coagulation-sedimentation-upflow aerated biological activated carbon - The removal rate of COD_ (Mn), UV_ (254) and ammonia nitrogen by ultrafiltration increased by 21.2%, 18.2%, 28.6% and 40.8%, 63.7% and 59.2% respectively, and the filtration resistance of these two processes was also far Less than the coagulation sedimentation - ultrafiltration process of filtration resistance.