With different ultrasonic power(200 W-800 W),ozone concentration(0.02 mg/L-0.14 mg/L)and treatment time(35 s-210 s),it is indicated the effect of sterilization by ultrasonic-ozone is better than that of untrasonic or ozone only.

• 超声功率从200W-800W；臭氧浓度从0.；02mg/L-0