Removal Efficacy of Microcystins by Ultrasound Technology

The effect of ultrasonic technique degrading microcystins in different conditions was discussed. The results show that when the concentration of microcystins solution is 12.43 μg/L, the microcystins removal rate can reach 81% under 1 200 W ultrasonic treatment for 5 minutes; when the same microcystins solution is under 1 200 W ultrasonic treatment for 15 minutes, microcystins removal rate can reach 99%, nearly all the microcystins being removed. When the wastewater containing microcystis is treated by either simple ultrasonic method or ultrasonic-coagulation method, the microcystins will not increase in water. The ultrasonic method in dealing with wastewater containing microcystis has three functions at the same time: destroying the cytoderm and killing microcystis directly, inhibiting the growth activity of surviving microcystis and degrading microcystins.