浸没式超滤膜替代砂滤处理东江水的中试研究

针对传统饮用水处理工艺的升级改造问题,通过中试实验,系统考察浸没式超滤膜替代砂滤处理东江水的出水水质并研究高通量条件下的膜运行条件。结果表明,浸没式超滤膜出水浊度不受原水水质条件影响,均保持在0.1 NTU以下,与砂滤出水相比具有优势,但有机物去除率与砂滤相差不大。膜系统在高通量条件下运行时,过滤周期应作适当的缩短,采用合理的物理清洗来缓解膜污染,并辅助以有效的在线化学清洗可保证膜过滤的长期稳定运行。

Pilot study of immersed UF membrane substituted for sand filtration in drinking water treatment of Dongjiang River

To focus on the upgrade and improvement of the conventional drinking water treatment processes, the effluent quality of immersed ultrafiltration(UF) for the treatment of Dongjiang River was investigated, and the operation conditions under higher flux were studied. Results show that effluent turbidity of UF which is lower than that of sand filter during the same period, was not affected by the quality of source water, and the tubidity of which were maintained less than 0.1 NTU. But the removal of organics by UF was almost the same as sand filter. Tests on optimization of operating conditions show that membrane filtration cycle should be shortened appropriately under the condition of a relatively high flux. Effective physical cleaning and auxiliary to short-term enhanced flux maintenance (EFM) cleaning would ensure the long-term stable operation of membrane filtration.