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将超滤膜技术分别与给水厂斜板沉淀池、平流气浮池和上向流生物滤池联用,考察各组合工艺的运行情况,并与水厂快滤池进行对比。结果表明,沉淀、气浮与压力式超滤膜联用,对致浊颗粒物与微生物有很好的去除效果,但对CODMn、氨氮等指标的去除效果有限。浮后水溶解氧浓度升高,存在促进压力式超滤膜柱内截留微生物滋生的可能。将生物滤池分别与压力式、浸没式超滤膜工艺组合,在常规化学安全性指标达标的基础上,超滤膜可以有效地截留微生物,降低生物滤池生物泄漏风险,保障出水的生物安全性。在抗生物污染方面,浸没式超滤膜比压力式超滤膜更具优势。快滤池对非溶解性指标的控制虽不及超滤膜,但仍然可以有效地保障出厂水的安全性。
The ultrafiltration membrane technology was used in combination with the inclined plate sedimentation tank, the flat air flotation tank and the upward flow biological filter in the water supply plant. The operation of each combination process was investigated and compared with the fast filter tank in the water plant. The results showed that the combination of sedimentation, air flotation and pressure-type ultrafiltration membrane can remove turbid particles and microorganisms well, but the removal of CODMn and ammonia nitrogen is limited. Floating dissolved oxygen concentration increased, there is to promote pressure-type UF membrane trapped microorganisms possible. The biofilters are respectively combined with the pressure-type and immersion-type ultrafiltration membrane technology. Based on the compliance of the conventional chemical safety indexes, the ultrafiltration membrane can effectively trap the microorganisms, reduce the biological leaking risk of the biofilter, and ensure the biological safety of the effluent Sex. In biofouling, immersion ultrafiltration membranes have advantages over pressure ultrafiltration membranes. Although the control of non-solubility index fast filter ultra-filtration membrane, but can still effectively protect the safety of factory water.