In-pen nanobubble generator launched by Moleaer for fish farmers

California-headquartered nanobubble generator maker Moleaer has launched Freya, a submersible system that the company says provides effective oxygenation and significant cost savings for fish farmers.

Moleaer said a year of field testing showed that Freya stabilises oxygen levels during stressful events for farmed salmonids such as transport and high temperatures, helping producers improve fish welfare and reduce oxygenation costs by up to 41%.

In Nordic myth and legend, Freya was a goddess associated with love, beauty, fertility, sex, war, gold, and magic for seeing and influencing the future. 

Moleaer's Freya offers more tangible and measurable results, delivering over 50 kg/h of oxygen with more than 85% recovery efficiency, reducing oxygen costs and decreasing energy consumption by up to 60%.

“The industry has been looking for a solution that improves oxygenation while reducing energy and operating costs and safeguarding fish welfare,” said Warren Russell, chief commercial officer at Moleaer, in a press release.

“Freya delivers on all counts, with proven results, lower energy use for oxygenation and a flexible, fully submersible design that works in virtually any aquaculture environment.” 

Proven its worth

Moleaer said the system has already proven its value at leading producers. At SalMar’s Innovanor processing facility in Norway, Freya quickly doubled dissolved oxygen (DO) levels in the holding cages, enabling fish to be held for harvest more intensively without compromising fish welfare while improving processing quality. Maintaining DO during high summer temperatures had previously been a challenge, but with Freya, SalMar Innovanor has been able to fully utilise the holding cages even in hot conditions. 

In Chile, Freya was tested in cages against industry-leading solutions and achieved dramatic reductions in oxygen consumption while maintaining DO levels at a higher level, improving fish welfare and avoiding mortality. 

Land-based fish farmer Salmon Evolution has also selected Freya for emergency oxygenation in 12 tanks at its facility on the island of Indre Harøya in western Norway. Moleaer said that after competitive testing, the system was selected to provide fast and reliable oxygen stabilisation that ensures fish welfare and production efficiency during high consumption. 

Moleaer is showcasing Freya ataquaculture trade shows including Aqua Nor in Trondheim, Norway, this week, and Aquaculture Europe in Valencia, Spain, in September.