预臭氧/常规/超滤组合工艺净化太湖水研究

水体富营养化给饮用水处理带来了很多难题。为了给水厂的升级改造提供参考,开展了预臭氧/常规/超滤组合工艺处理太湖水的试验研究,并分析了超滤膜的污染情况。试验结果显示:组合工艺出水浊度、CODMn、UV254、DOC的平均值分别为0.09 NTU、2.23 mg/L、0.039 cm-1、2.90 mg/L,总去除率分别为97.25%、34.41%、40.48%、28.55%。膜出水中大于2μm的颗粒数平均为16个/mL,未检测出细菌及大肠菌群。此外,组合工艺还能有效去除铁、锰及藻类,其出水含量低于标准限值。与原水直接进行超滤处理相比,组合工艺的跨膜压差增加更平缓。因此,该组合工艺可用于太湖微污染原水的处理。

Preozonation/Conventional Technology/Ultrafiltration Process for Purification of Taihu Lake Water

Eutrophication leads to a lot of problems in drinking water treatment.In order to provide a reference for upgrading waterworks,a pilot study on treatment of Taihu Lake water using the combined process of preozonation,conventional technology and ultrafiltration was carried out,and the ultrafiltration membrane fouling was analyzed.The results showed that the average turbidity,CODMn,UV254 and DOC in the treated water by the combined process were 0.09 NTU,2.23 mg/L,0.039 cm-1 and 2.90 mg/L,and the total removal rates were 97.25%,34.41%,40.48% and 28.55% respectively.The average particles larger than 2 μm in the membrane effluent were 16 p/mL,and neither bacteria nor E.coli was detected.In addition,the combined process could effectively remove iron,manganese and algae in water,and the contents in the treated water were lower than the standard limits.Compared with direct ultrafiltration of raw water,the TMP of the combined process was increased more stably.Therefore,the combined process can be used for micro-polluted lake water treatment.