Under certain conditions, ultrasound can also repel the aquatic organisms in the sound field obviously, and kill the aquatic egg cells and larvae.

Ultrasonic parameters of 20-30 kHz and 0.3-0.5 W/cm2 have obvious effects on aquatic organisms, especially marine organisms.

* As long as 10 seconds -30 seconds of external processing time.

* The specific water temperature (30℃-45℃) has the best effect.

* These effects of ultrasound can obviously resist the growth of algae under certain conditions:

* When the ultrasonic frequency is 580 kHz, when the free radical concentration peaks, the removal rate of Microcystis is the highest, indicating that oxidation may be more effective in removing Microcystis.

* Low-frequency and low-energy ultrasound has a strong ability to treat the most harmful cyanobacteria in the water body, and has a good inhibitory effect on green algae and diatoms. Ultrasonic parameters of 20-40 kHz and 0.2-0.5 W/cm2 have better removal effects on cyanobacteria than green algae and diatoms, and better removal effects on Anabaena than Microcystis;

* Intermittent work is more effective: working 10-15 times a day, 5-15min each time, the inhibitory effect on algae is better.