膜法处理工艺去除微污染有机物的对比研究

Study of removal of microorganicpollutants in water by membrane process (UF,NF and RO)

为选择饮用水深度净化的主体工艺.以CODMn、UV254作为水质参数,以Ames试验这一致突变性的生物活性指标分别对超滤膜(UF)、纳滤膜(NF)和反渗透膜(RO)法的饮用水深度净化的效能进行分析评价.实验结果表明:NF膜和RO膜对饮用水中CODMn、UV254和致突变物质有良好的去除,CODMn的去除都在0.5mg/L以下,去除效率在50％以上,对UV254的去除率为75％-100％,Ames试验结果为阴性,且NF膜处理好于RO膜处理,表明纳滤膜法能够保证饮用水水质安全,可作为小区饮用水深度净化的主体工艺.而UF膜对CODMn、UV254的去除效率不高,分别在12.5％-49.0％及20％-36％,并且Ames试验结果为阳性,表明UF膜去除水中微污染有机物的效果较小,仍有致突变性的残留.

CODMn, UV254 and Ames test were used for the evaluation of microoganicpollutants and mutageic pollutants in drinking water. Arid the performance of removing microoganicpollutants by UF, NF and RO process were investigated. The performance of NF and RO processes for microoganicpollutants removal were compared with that of UF process. CODMn, UV254 and Ames test results demonstrate the effectiveness and security of NF and RO processes for microoganicpollutants and mutageic pollutants removal from drinking water. But the performance of UF process was not so effective that there was residual of mutageic pollutants in water.