How it works

The use of ultrasound for controlling algae has been known for some time.  However, the practical use of such technology is relatively recent and utilises the resonance effects of ultrasonic waves on the algae cell.  The ultrasonic waves are derived from the creation of certain sound vibrations with periodic interruptions.  A submerged transducer that is specifically designed and purpose built to be small and water resistant generates the ultrasonic vibrations via a uniquely designed control unit.  These sound shock waves are directed at the vacuole of the algae.  Initial observations show that the shock waves probably weaken the cell membranes causing the algae to collapse in on themselves and sink out of suspension.

This new approach is environmentally friendly, cost effective and uses no chemicals.  These ultrasound vibrations, which are inaudible to people, are no threat to human beings, animals or fish.

These ultrasonic devices are used in horticulture, aquaculture, potable and wastewater applications.  The transducers used are capable of emitting ultrasonic vibrations up to a range of 300 metres, covering a radius of 180 degrees.

Using ultrasound to specifically control algae in water treatment is a new environmentally friendly method that is very cost effective, ie rapid pay back of initial costs, often within just months of installation.

A N Hampton BSc PhD Envirosonic UK