纳滤工艺处理微污染原水的中试

Pilot Test of Nanofiltration Process for Micro-Polluted Raw Water Treatment

南方部分城市由于水质型缺水,水源呈现微污染的水质特点,给常规工艺带来较大的处理难度。为保障饮用水供水安全,该文采用了纳滤工艺进行中试研究。试验结果表明:纳滤能高效去除水中的有机物,出水CODMn、UV254、TOC含量低于0. 3 mg/L、0. 010 cm-1、0. 4 mg/L。纳滤膜可以选择性去除水中的无机离子,保留部分对人体有益的钙镁离子。同时,对多环芳烃、有机氯农药、有机卤化物的截留率在50%、90%和90%左右。

Some southern cities of China are deficient in fresh water resources since water quality. Raw water in these areas is polluted by micro organic pollutants, which causes processing difficulty to conventional process. Nanofiltration membrane technology was used and tested to ensure water quality of the effluent. The results showed that nanofiltration could remove organic matters, such as CODMn, UV254 and TOC, whose conceatration was below 0. 3 mg/L, 0. 010 cm 1 and 0. 4 mg/L. Nanofiltration could retain some of calcium and magnesium ions which benefited to health but intercepting most of inorganic ions. Meanwhile, over 50% of PAHs, 90% of OCPs and 90% of AOX could be removed.