Abstract: Organic metal ultrafiltration membranes have good hydrophilicity and hydrophobicity during oil-water separation and filtration, which make them resistant to pollution and less prone to clogging. In the oil removal experiment conducted by using organic metal ultrafiltration membrane, the oil removal device using organic metal ultrafiltration membrane can operate stably for more than one month at a membrane flux of 30LMH, and the average removal rates of petroleum and SS are 76.8% and 76.6% respectively. The produced water for petroleum and SS is stable and meets the standards, with the highest being only 10.3mg/L and 23mg/L respectively, which is nearly 50% lower than the effluent indicators required by the air flotation process. The operation difficulty of the oil removal device using organic metal ultrafiltration membrane increases at a membrane flux of 40LMH. The combined cleaning of CEB and CIP can effectively extend the stable operation cycle of the membrane and ensure the stable operation of the system. The organic metal ultrafiltration membrane process can replace the traditional air flotation treatment process at a membrane flux of 30LMH.

Key words: organic metal materials, ultrafiltration, oil removal