新型聚芳醚砜酮超滤膜污染与膜阻力研究

STUDY ON FOULING AND RESISTANCE OF PPESK ULTRAFILITRATION MEMBRANE

采用新型聚芳醚砜酮(PPESK)超滤膜为分离介质,以炼油污水为研究对象,测定了膜污染和膜阻力。结果表明,PPESK超滤膜在100kPa下的初始通量为480L·m-2·h-1,自身阻力为0.78nm-1;在超滤膜运行过程中,溶液通量随运行时间呈指数衰减,通量衰减由60%增加到95%时,膜污染阻力由0.69nm-1增大到5.68nm-1,膜污染阻力占总阻力的分数从43.95%增大到86.72%,其中不可逆膜污染阻力大小为0.20nm-1。PPESK超滤膜对达标炼油污水过滤时,因膜污染造成通量衰减,经化学清洗能够得到较大程度的恢复。

Fouling of ultrafilitration membranes by oil refinery wastewater was systematically investigated in conjunction with analysis of the membrane resistances.The study used new poly（phthalazinone ether sulfone ketone）（PPESK） as the separation medium.The results showed that the initial flux of PPESK ultrafilitration membrane was 480 L·m^-2·h^-1 under 100 KPa.The specific resistance of PPESK ultrafilitration membrane was 0.78 nm^-1.The flux decline was greatly decreased with the increasing the operating time.When the ultrafilitration membrane flux declined from 60% to 95%,the membrane fouling resistance increased from 0.69 to 5.68 nm-1.That is to say,the percentage of membrane fouling resistance increased from 43.95% to 86.72%.The irreversible membrane fouling resistance of PPESK ultrafilitration membrane was 0.20 nm^-1.