Selection of ultrafiltration membranes for advanced treatment of tap water

Polysulphone hollow fiber ultrafiltration membrane was designed and operated experimentally,which clarified the raw water from tap water networks without any pretreatment into high quality drinking water.The results showed that,while the molecular weitht cut-off(MWCO) of the UF membrane increased from 6 000 to 50 000,the water output increased,and the removal rate of the main water quality indexes decreased;the purified water had good quality,even when the raw water quality deteriorated abruptly,UF membrane still could clarified badly polluted tap water characterized with high turbidity and colority into clean water which met drinking water quality index.