Ultrasound project aims to control blue green algae at Lake Bullen Merri

The site is popular among watersport enthusiasts, however summer algal blooms render the lake inaccessible during most of the peak tourist periods.

A system installed this week will use ultrasonic waves in an attempt to break up the cells of the algae and reduce the amount and duration of any algae blooms that may occur.

The solar-powered equipment will be on four floating pontoons anchored in the lake.

Corangamite Shire Councillor Laurie Hickey said the chemical-free technology promised an environmentally sound answer to a long-term problem.

"Lake Bullen Merri is a wonderful asset for the Shire's boaties, kayakers, fishers, water skiers, open water swimmers and, of course, the annual Yachting Western Victoria Easter Regatta," he said.

"It's been horrible that summer algal blooms have made the lake inaccessible during the best weather for those sorts of activities.

"This 12 month pilot will allow us to evaluate if the ultrasound technology is a viable and cost effective permanent solution.

"It is our fervent hope that it will be successful and put the lake front and centre for local users and visitors from further afield."

The frequency of the ultrasound is between 15 and 50 kHz which has been selected in an effort to impact the algae and no other lake species, council environment and emergency manager Lyall Bond said .

"DELWP owns the lake but council has undertaken this project which will provide a good result for our community," Mr Bond said.

"We just ask that the lake users keep away from them to ensure they have the best chance of working."

Melbourne Company EnviroSonic won the tender ahead of three other companies.

The quotations were assessed by a panel which involved a council officer, independent scientific advisor and member of the Integrated Water Network.

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