碳化硅陶瓷膜处理采油污水的中试试验

Pilot tests on the treatment of oil extraction wastewater with silicon carbide ceramic membranes

用0.02μm的多通道非对称性碳化硅陶瓷膜对采油污水进行了现场中试。在各种运行条件下,陶瓷膜出水SS<1.0 mg/L,油<10 mg/L,粒径中值<1.0μm。还考察了不同运行条件下陶瓷膜膜通量和跨膜压差的变化,以及强化混凝过滤对膜通量的影响。根据试验结果对陶瓷膜在采油污水处理中的进一步研究提出了建议,并对其工程应用前景进行了展望。

The multipath and asymmetrical silicon carbide membranes whose pore side is 0.02 μm have been used for carrying on the pilot tests of oil extraction wastewater. Under various operating conditions, the suspended solids of ceramic membrane effluent are less than 1.0 mg/L, oil content of effluent is 〈10 mg/L, and particle diameter median〈 1.0 μm. Under different operating conditions, the changes of the membrane pressure difference of the membrane flux of ceramic membranes, the transmembrane pressure difference, and the effect of reinforced coagulation-filtration on membrane flux are investigated. According to the test results, suggestions on further research of applying ceramic membranes to the treatment of oil extraction wastewater are brought forward.