On-Site Oxygen Generation
Produce oxygen directly at the aquaculture facility using PSA oxygen generation technology, reducing dependence on external oxygen supply.
Oxygenation System
Aquaculture Oxygenation System for RAS
Complete oxygen management solution for commercial RAS — integrating PSA oxygen generators, oxygen cones and air suspension blowers to maintain stable dissolved oxygen and support high-density fish farming.
- On-site oxygen generation
- Efficient oxygen dissolution
- Complete RAS integration
Overview
What Is an Aquaculture Oxygenation System?
An aquaculture oxygenation system is an integrated solution designed to increase and maintain dissolved oxygen levels in recirculating aquaculture systems.
Unlike traditional aeration methods that rely only on air diffusion, commercial RAS oxygenation systems use concentrated oxygen supply and efficient gas transfer equipment to support higher stocking densities and biological loading.
A complete oxygenation system typically includes four modules:
- Oxygen Generation Module
- Oxygen Dissolution Module
- Aeration Support Module
- Monitoring and Control System
YUTANK oxygenation solutions combine these modules into a complete system designed for intensive freshwater and marine aquaculture applications.
Advantages
Key Advantages of YUTANK Oxygenation System
Efficient Oxygen Dissolution
Oxygen cones increase gas-water contact efficiency through pressurized mixing, delivering high dissolved oxygen water into the RAS circulation system.
Complete RAS Integration
Designed to work together with fish tanks, mechanical filtration, biofilters, degassing systems, and water quality monitoring equipment.
How It Works
How Oxygenation Works in RAS
The oxygenation process combines on-site oxygen generation, high-efficiency oxygen dissolution and biological filtration aeration within the RAS circulation loop.
Oxygen Generation
Compressed air passes through the PSA oxygen generator, producing high-purity oxygen on site.
Oxygen Dissolution
Pure oxygen is dissolved into circulating water under pressure inside the oxygen cone, producing high dissolved oxygen water.
Oxygen Delivery
High dissolved oxygen water is returned to the RAS culture system to maintain stable dissolved oxygen levels.
At the same time, the air suspension blower supplies airflow through the air distribution system to support MBBR biofilter aeration and additional fish tank oxygen support.
Oxygen Generation
PSA Oxygen Generator Module
The PSA oxygen generator provides a stable oxygen source for the oxygenation system. It uses compressed air and molecular sieve separation technology to produce oxygen with stable purity for aquaculture oxygen supply.
The oxygen generation package can be configured with:
- Air Compressor
- Molecular Sieve
- Booster Pump
- Air Tank
- Refrigerated Dryer
Stable Oxygen Supply
Provides continuous oxygen production for commercial aquaculture systems.
Compressed Air Treatment
Refrigerated dryer systems improve compressed air quality and support stable PSA oxygen production.
Multiple Capacity Options
Available oxygen production capacities range from 10 L/min up to 150 L/min for different RAS scales.
PSA Oxygen Generator Models
| Model | Oxygen Output | Outlet Pressure | Nominal Oxygen Purity | Power |
|---|---|---|---|---|
| CH-O10LC | 10 L/min | 0.4 MPa | 93% | 800W |
| CH-O20LC | 20 L/min | 0.4 MPa | 93% | 1600W |
| CH-O30LC | 30 L/min | 0.4 MPa | 93% | 2300W |
| CH-O40LC | 40 L/min | 0.4 MPa | 93% | 3000W |
| CH-O50LC | 50 L/min | 0.4 MPa | 93% | 3700W |
| CH-O60LC | 60 L/min | 0.4 MPa | 93% | 4500W |
| CH-O80LC | 80 L/min | 0.4 MPa | 93% | 5800W |
| CH-O100LC | 100 L/min | 0.4 MPa | 93% | 8kW |
| CH-O150LC | 150 L/min | 0.4 MPa | 93% | 11kW |
These reference specifications are for configurations with a refrigerated dryer. Confirm the final model and supplied configuration for each project.
Oxygen Dissolution
Oxygen Cone Module
The oxygen cone is designed specifically for intensive aquaculture systems requiring high dissolved oxygen water. By increasing gas-water contact pressure, the oxygen cone improves oxygen transfer efficiency and dissolves oxygen into circulating water.
In high-density RAS systems, oxygen demand can exceed what conventional aeration can provide. Oxygen cones improve oxygen transfer by mixing pure oxygen with circulating water under pressure, producing high dissolved oxygen water before returning to culture tanks.
High Oxygen Utilization
Designed for efficient oxygen transfer in pressurized water environments.
Stainless Steel Construction
The standard oxygen cone uses stainless steel construction, providing corrosion resistance, mechanical strength and long-term operation reliability.
Multiple Flow Capacities
Available models cover flow rates from 10 m³/h up to 200 m³/h for different RAS circulation scales.
Oxygen Cone Models
| Model | Flow Rate | Dimensions | Material | Pump Power |
|---|---|---|---|---|
| OC80 | 10–30 m³/h | 600 × 1650 mm | Stainless Steel | 1.5kW |
| OC100 | 40–60 m³/h | 800 × 2150 mm | Stainless Steel | 2.2kW |
| OC125 | 80–120 m³/h | 1000 × 2650 mm | Stainless Steel | 4kW |
| OC150 | 150–200 m³/h | 1200 × 3150 mm | Stainless Steel | 5.5kW |
The standard oxygen cone uses stainless steel construction; FRP is available for customized projects.
Aeration Support
Air Suspension Blower Module
Air suspension blowers use air bearings and high-speed motors to operate with reduced mechanical contact, helping minimize wear and maintenance requirements.
In RAS systems the air suspension blower provides stable airflow for oxygen demand management, serving two functions:
- MBBR biofilter aeration
- Additional fish tank oxygen support
Air Suspension Blower Advantages:
- Reduced mechanical contact wear
- Oil-free airflow operation
- Lower maintenance requirements
- Stable airflow supply
- Suitable for continuous RAS operation
MBBR Biofilter Aeration
Provides oxygen supply for nitrifying bacteria and maintains aerobic biological filtration conditions in the MBBR biofilter.
Additional Fish Tank Oxygen Support
Provides supplementary aeration support for culture tanks under high biomass conditions.
Specification Range
| Power | Pressure Range |
|---|---|
| 2.2kW | 10–40 kPa |
| 3kW | 10–40 kPa |
| 4kW | 10–40 kPa |
| 5.5kW | 10–40 kPa |
| 7.5kW | 10–40 kPa |
| 11kW | 10–40 kPa |
| 15kW | 10–60 kPa |
| 18.5kW | 10–60 kPa |
| 22kW | 10–60 kPa |
| 30kW | 10–60 kPa |
| 37kW | 10–60 kPa |
Comparison
Fish Oxygenation vs Biofilter Aeration
Fish tank oxygen supply and biofilter aeration serve different functions in a RAS, using different equipment to achieve their targets.
| Function | Fish Tank Oxygen Support | Biofilter Aeration |
|---|---|---|
| Purpose | Maintain dissolved oxygen for fish growth | Support nitrifying bacteria activity |
| Location | Culture tanks | MBBR biofilter |
| Equipment | Oxygen Cone + Oxygen Supply | Air Suspension Blower + Diffusers |
| Main Target | DO stability | Biological filtration efficiency |
Specifications
Complete Oxygenation System Components
The complete oxygenation system combines oxygen generation, oxygen dissolution, aeration support and dissolved oxygen monitoring into one integrated solution.
| Component | Function |
|---|---|
| PSA Oxygen Generator | Generate high-purity oxygen |
| Oxygen Cone | Dissolve oxygen into circulating water |
| Air Suspension Blower | Provide aeration support |
| DO Monitoring System | Maintain oxygen level control |
RAS Integration
Integration with Complete Recirculating Aquaculture Systems
The oxygenation system is placed after mechanical filtration, degassing and biological filtration, and before UV treatment, so that high dissolved oxygen water returns to the culture tanks. As part of a complete RAS system, oxygen supply is coordinated with upstream solids removal, organic load control, gas management and disinfection.
Projects
RAS Aeration Project Application
Explore the Guizhou experimental RAS project, its site installation and recorded aeration equipment.
816 m³ Largemouth Bass RAS Project
Guizhou, China
- Species
- Largemouth Bass
- System Water Volume
- 816 m³
- Culture Tanks
- 8
- Culture Tank Size
- Ø10 m × 1.5 m
Selected Equipment
- Roots Blowers: 8
Why YUTANK
Why Choose YUTANK for Your RAS Oxygenation System?
-
01
Complete RAS Oxygen Management
YUTANK designs oxygenation as part of the complete recirculating aquaculture system rather than as isolated equipment, coordinating oxygen supply with solids removal, biological filtration and dissolved oxygen management — including CO₂ removal through degassing — within the overall circulation process.
-
02
Integrated Three-Module Design
The oxygenation system combines PSA oxygen generation, oxygen cone dissolution and air suspension blower aeration in one integrated solution, covering both fish culture oxygen demand and biological filtration oxygen demand within a single coordinated design.
-
03
Project-Specific Engineering Support
Oxygenation sizing considers more than nominal capacity. Depending on available project data, our engineers evaluate system volume, biomass, feed load, species and target dissolved oxygen to recommend the appropriate PSA generator, oxygen cone and blower configuration.
FAQ
FAQ About Aquaculture Oxygenation Systems
01 What is an oxygenation system in RAS?
An oxygenation system supplies and dissolves oxygen into circulating water to maintain suitable dissolved oxygen levels for fish growth and biological filtration.
02 What is the difference between aeration and oxygenation?
Aeration transfers oxygen from air into water, while oxygenation systems use concentrated oxygen and specialized equipment such as oxygen cones to achieve higher dissolved oxygen levels required for intensive RAS operation.
03 Why use an oxygen cone in aquaculture?
An oxygen cone increases oxygen dissolution efficiency by improving gas-water contact under pressure, producing high dissolved oxygen water for intensive aquaculture systems.
04 Can one oxygenation system support both fish tanks and biofilters?
Yes. Commercial RAS projects often use oxygen cones for fish tank oxygen supply and air blowers for MBBR biofilter aeration.
05 How do I select an oxygenation system for my RAS?
Selection depends on total system water volume, biomass loading, fish species, feed input, target dissolved oxygen level and filtration configuration. YUTANK engineers recommend the configuration according to the overall RAS design.
06 What size oxygen generator do I need for my RAS?
The required generator capacity depends on system volume, biomass, feed loading, oxygen demand and dissolved oxygen target. YUTANK sizes the PSA oxygen generator according to the overall RAS design rather than applying a fixed capacity for every project.
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Equipment: Oxygenation System