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针对我国农村饮用水处理技术落后、设施管理水平低的现状,研发出基于低水头、低通量原水直接超滤工艺。以水质良好的水库水为处理对象,研究了直接超滤工艺长期运行的稳定性和对污染物的去除效果,探讨了排泥对直接超滤效能的影响,对比了两种材质超滤膜的通量及除污效能。试验结果表明,直接超滤工艺在65 cm过滤水头和5~6 L/(m~2·h)膜通量条件下可保持长期稳定运行,出水浊度低于0.07 NTU,出水细菌总数和总大肠菌群数均满足《生活饮用水卫生标准》(GB 5749—2006)的要求。采取排泥措施可以显著提高膜池内溶解氧浓度,同时氨氮和UV_(254)去除率明显增加。
In view of the backward technology of rural drinking water treatment in our country and the low level of facility management, a direct ultrafiltration process based on low water head and low-flux raw water was developed. Taking the reservoir water with good water quality as the treatment target, the stability of the long-term operation of the direct ultrafiltration process and the removal effect on the pollutants were studied. The effect of the sludge discharge on the direct ultrafiltration efficiency was discussed. Flux and decontamination efficiency. The results showed that the direct ultrafiltration process can maintain long-term stable operation under the condition of 65 cm filtration head and 5 ~ 6 L / (m ~ 2 · h) membrane flux, the effluent turbidity is less than 0.07 NTU, the total effluent bacteria and total The number of coliform bacteria meet the requirements of “drinking water health standards” (GB 5749-2006). Dredging measures can significantly increase the concentration of dissolved oxygen in the membrane tank, while ammonia nitrogen and UV 254 removal rate increased significantly.