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AgInnovation Ontario: Bubble-based aeration for more sustainable aquaculture

AgInnovation Ontario: Bubble-based aeration for more sustainable aquaculture

Guelph – A new pump that uses air to circulate water is being developed at the University of Guelph, and it could make some favorable waves in the aquaculture industry.

Known as the Airlift Pump, the device is intended to replace costly and energy-hungry circulation machinery at both inland and open-water fish farms. It’s versatile, energy efficient, and even has some unintended and rather positive side effects on water quality.

According to principal researcher Wael Ahmed, associate professor at Guelph’s School of Engineering, the Airlift Pump is an aeration system using a specially designed dual air injector, and runs using the physics of buoyancy.

As water flows into the pump, air is injected at a specifically controlled rate. Farmers can change from continuously injected air to a pulsating injection mode, depending on need, with aerated water then making its way back to the a farm’s fish enclosures for circulation.