超滤膜间歇处理处理含油废水的实验效果

本实验采用不同截留分子量的聚乙烯超滤膜在间歇式操作条件下处理含油液废水，实验考查了压力、温度对透水率和CODCr去除率的影响.结果表明：在间歇式操作条件下超滤膜处理乳化液废水的透水率受操作压力和温度的影响，对于截留分子量为8 000的超滤膜应选择0.3～0.7　MPa的操作压力，而对于截留分子量为2　500的超滤膜选择0.7～1.0　MPa的压力，同时，超滤膜的温度范围选择为25～32　℃，采用截留分子量为2　500的聚乙烯超滤膜间歇含油废水CODCr去除率可达93%左右.

Research on Treatment Effect Under Intermittent Cross- Flow of Oil Wastewater by Ultrafiltration Membrane

Polyethylene glycol membranes with different molecular weight cut- offs under intermittent cross- flow condition are used to treat oil wastewater, and their experimental conditions including pressure, temperature on permeate rate and removal rate of chemical oxygen demand (CODCr ) are studied in the paper. The results show the permeate rate of ultrafiltration membrane can be influenced by pressure and temperature,and pressure is chosen between 0.3 ～0.7 MPa to the PEG with molecular weight cut- offs of 8 000 and between 0.7 ～ 1.0 MPa to the PEG with molecular weight cut - offs of 2 500, and temperature is chosen between 25 ～ 32 ℃. The UF membrane under intermittent cross- flow operating mode can remove up to 93 % CODCr.