Dissolved oxygen (DO) is a lifeline for aquaculture—insufficient
oxygen leads to fish and shrimp hypoxia, reduced growth rates, and
even large-scale mortality, directly impacting breeding benefits.
The psa oxygen generator (Pressure Swing Adsorption Oxygen Generator), a core type of Industrial Oxygen Generator, operates on psa technology for oxygen generation to physically separate oxygen from air using high-performance
molecular sieves, producing 95% pure oxygen without chemical
additives. Compared with traditional oxygenation methods (impeller
aerators, oxygen bombs), it delivers higher oxygen transfer
efficiency, stable DO levels, and lower labor costs. This 70Nm³/h
model, optimized for aquaculture scenarios, balances output, energy
consumption, and environmental adaptability, making it ideal for
large-scale fish ponds, recirculating aquaculture systems (RAS),
and shrimp breeding bases.
Gas production m³/h | Oxygen concentration% | Oxygen pressure Mpa | Power 220V Power/kw | Host weight/kg | Dimensions/mm | Air loss factor | Number of bottles per day 40L/120-150kg |
3 | 93±3 | 0.4±0.1 | 0.2 | 600 | 15009001500 | 13.5 | 12-15 |
5 | 93±3 | 0.4±0.1 | 0.2 | 900 | 16009001500 | 13.5 | 20-24 |
10 | 93±3 | 0.4±0.1 | 0.2 | 1200 | 16009001900 | 13.5 | 40-48 |
20 | 93±3 | 0.4±0.1 | 0.2 | 1500 | 190010002180 | 13.5 | 80-96 |
30 | 93±3 | 0.4±0.1 | 0.2 | 2000 | 200011002180 | 13.5 | 120-154 |
40 | 93±3 | 0.4±0.1 | 0.2 | 2500 | 260012002300 | 13.5 | 160-192 |
50 | 93±3 | 0.4±0.1 | 0.5 | 2800 | 180015002400+800 | 13.5 | 200-240 |
60 | 93±3 | 0.4±0.1 | 0.5 | 3200 | 180015002600+800 | 13.5 | 240-184 |
70 | 93±3 | 0.4±0.1 | 0.5 | 3500 | 180016002800+800 | 13.5 | 280-236 |
80 | 93±3 | 0.4±0.1 | 0.5 | 4000 | 180016002900+1000 | 13.5 | 320-394 |
90 | 93±3 | 0.4±0.1 | 0.5 | 4800 | 200016002800+1000 | 13.5 | 360-432 |
100 | 93±3 | 0.4±0.1 | 0.5 | 5800 | 220016002900+1000 | 13.5 | 400-480 |
120 | 93±3 | 0.4±0.1 | 0.5 | 6500 | 240016003100+1000 | 13.5 | 480-576 |



The psa oxygen plant working principle relies on cyclic adsorption and regeneration of
molecular sieves:
- Air purification: Ambient air is filtered through a three-stage system (dust
removal, dehumidification, oil removal) to remove impurities
harmful to molecular sieves—critical for humid aquaculture
environments.
- Pressure adsorption: Purified air enters dual adsorption towers at 0.6MPa; molecular
sieves selectively adsorb nitrogen, leaving 95% pure oxygen stored
in a buffer tank.
- Oxygen supply: Oxygen is pressurized to 0.3MPa and delivered to aeration
devices, converting into micro-nano bubbles for efficient
dissolution.
- Regeneration: Saturated molecular sieves are depressurized to release nitrogen,
regenerating for reuse—no chemical waste, ensuring aquaculture
water safety.
Aquaculture-specific optimizations include: a corrosion-resistant
304 stainless steel body (to withstand pond water splashes), a
mobile crawler base (for transfer between ponds), and a rainproof
control cabinet (protecting electrical components in open-air
environments).
Both belong to pressure swing adsorption oxygen plant technology, but their aquaculture applicability differs:
- psa oxygen generator: Advantages include compact size, fast start-up, and low
maintenance—ideal for medium-scale farms (50-100 acres) with
fluctuating oxygen demand. The 70Nm³/h model’s frequency conversion
design reduces energy use during low-demand periods (e.g., daytime
with high photosynthesis).
- vsa oxygen generator (Vacuum Swing Adsorption): Uses vacuum regeneration for lower
energy consumption (≤0.4kWh/Nm³ O₂) but has larger size, higher
initial investment ($35,000-$45,000), and longer start-up time (≥10
minutes). It suits super-large farms (≥200 acres) with stable, high
oxygen demand—overkill for most medium-scale operations.
- Key tradeoff: For 80% of aquaculture scenarios, the PSA plant’s balance of
cost, flexibility, and efficiency makes it more practical than VSA.
With global emphasis on green aquaculture, pressure swing adsorption oxygen plant aligns with sustainable development goals:
- Energy efficiency: The 70Nm³/h PSA plant reduces carbon emissions by ~20 tons/year
vs. traditional aerators, complying with low-carbon aquaculture
policies.
- Water quality protection: High oxygen transfer efficiency reduces organic matter
accumulation in pond bottoms, lowering ammonia and nitrite
levels—avoiding water pollution and reducing the need for chemical
water conditioners.
- Policy support: In many regions, aquaculture projects using energy-efficient
oxygenation equipment qualify for subsidies (e.g., 10%-15% of
equipment cost), further reducing enterprise burdens.
The 70Nm³/h 95% purity PSA Oxygen Generation Plant revolutionizes aquaculture oxygenation by combining psa technology for oxygen generation with aquaculture-specific design. Its high oxygen transfer
efficiency, low energy consumption, and stable performance solve
the core pain points of large-scale breeding, while its psa oxygen plant cost advantage delivers significant long-term savings. Compared with vsa oxygen generator and traditional methods, it better balances practicality and
economy for most aquaculture scenarios. For breeders aiming to
improve survival rates, reduce costs, and comply with green
policies, this PSA plant is a reliable, future-oriented
investment—laying a solid foundation for efficient, sustainable
aquaculture development.