臭氧+超滤对二级出水溶解性有机物的特性研究

Ozone + Ultrafiltration on the Characteristic Study of Municipal Sewage Treatment Plant Secondary Effluent Dissolved Organic Compound

以城市污水处理厂二级出水中溶解性有机物为研究对象,采用臭氧为预处理手段,以4000、6000、10000、20000、30000Dalton的聚醚砜超滤膜(polyether sulfone,PES)对二级出水中溶解性有机物进行研究。结果表明:1引起膜通量下降的溶解性有机物的分子量主要在大于20000Dalton的范围内;2城市污水处理厂二级出水中溶解性有机物的大小主要分布在小于4000Dalton的范围内;3臭氧能使高分子量有机物低分子化。

The dissolved organic compound（DOC） of municipal sewage treatment plant secondary effluent is used for research object,adopting ozone as pretreatment means and passing through 4000,6000,10000,20000,30000 Dalton polyether sulfone（PES）ultrafiltration membrane to ultrafiltrate the water samples,studying dissolved organic matter of the secondary effluent. The results indicate that 1the molecular weight of dissolved organic compound caused flux decline is mainly in the range of more than 20000Dalton;2the size of the dissolved organic compound of municipal sewage treatment plant secondary effluent is mainly in the range of less than 4000Dalton;3ozone can lower the high molecular weight of organics.