Oxygen Generator for Aquaculture (PSA)

An oxygen generator for aquaculture uses pressure swing adsorption (PSA) to pull oxygen straight out of the air on site, so a farm never has to schedule cylinder deliveries or store bulk liquid oxygen. Air is compressed, passed through a molecular sieve that adsorbs nitrogen, and the enriched oxygen stream (typically 90–95% purity) feeds directly to oxygen cones, diffusers or nanobubble generators around the site.

Compared with a rented liquid oxygen tank, a fish farm oxygen generator runs continuously at a fixed daily cost and removes the safety and logistics burden of storing cryogenic liquid oxygen on a rural site. It also outperforms blower-only aeration once stocking density climbs, because dissolved oxygen from a PSA stream can be pushed well past what surface aeration alone can deliver during hot, low-pressure nights.

SIGMA sizes each PSA oxygen generator to the farm's peak biomass and delivery point — hatchery, grow-out pond or RAS loop — and pairs it with oxygen cones or fine-bubble/nanobubble diffusers so the gas actually dissolves before it reaches the fish.

PSA generator vs. oxygen tanks and liquid oxygen

Many farms start with oxygen tanks for aquaculture or contracted LOX deliveries. Cylinders are simple, but refills, rental and trucking add up, and one missed delivery can cost a whole crop in a high-density system. An on-site oxygen plant for aquaculture removes that dependency: it draws ambient air, strips nitrogen in the molecular sieves and supplies a continuous oxygen stream, with a small cylinder bank kept only as emergency backup.

Salmon and trout farms

Cold-water species tolerate very little oxygen debt. An oxygen generator for salmon farming supports smolt units, raceways and loading operations, holding saturation steady through grading, transport and warm spells — exactly when dissolved oxygen drops fastest and stock is under the most stress.

Hatcheries and broodstock

Eggs, larvae and broodstock are the most valuable and least forgiving stock on a farm, which is why an oxygen system for hatchery and broodstock rooms is usually the first PSA installation a company makes. Paired with a dissolved oxygen cone, the generator gives tanks fine control of saturation without anyone handling cylinders.

Shrimp ponds and biofloc

In intensive shrimp and biofloc systems the generator feeds nano-tube oxygen diffusers directly, raising bottom dissolved oxygen where feed and floc consume it first.