Abstract: Considering the characteristics of uranium decontamination wastewater, such as high surfactant content, radioactivity and complicated component, this study used ultrasonic enhanced membrane separation technology to treat the uranium decontamination wastewater. This study explored the cleaning effects of ultrasonic working time, ultrasonic frequency, membrane contamination time and other factors on the flux of the ceramic membrane, and analyzed the comparison result with the traditional cleaning technology. The results show the cleaning effect is better when the ceramic membrane pore size is 0.2 μm, ultrasonic time is 6 min, and ultrasonic frequency is 35 kHz. Ultrasonic enhanced membrane cleaning technology for different levels of contaminaed ceramic membrane flux can be restored to the original flux of 70%-95% and has obvious advantages compared with the ordinary rinsing technology. The ultrasonic cleaning effect of water rinsing can be enhanced to more than 30% for low concentration, and can still be enhanced by about 15% for high concentration. The membrane flux can be enhanced by 15%-30%. In conclusion, the ultrasonic enhanced ceramic membrane can effectively carry out the treatment of uranium-containing decontamination wastewater, enhance the membrane flux and reduce membrane contamination, which has good prospects for application.

Key words: ultrasonic, membrane cleaning, ceramic membranes, decontamination wastewater, uranium