A new technique promises to offer a healthier solution to a common problem.

Researchers at the University of Adelaide are studying the application of ultrasound to control toxic algal blooms in fresh water supplies. Blue-green algae can contaminate water and create environmental problems when it forms blooms in fresh water. The new ultrasound solution, which has already been tested successfully in labs, will use ultrasound at low amplitudes to immobilize the blue-green algae without releasing its toxins into the water. To implement this, the researchers are planning to mount ultrasound generators inside huge underwater columns that contain mixers to draw the water in for treatment.

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