Degassing
CO2 stripping columns and degassing loops to maintain safe carbon dioxide levels in intensive culture.
What Problem It Solves
Elevated CO2 reduces fish appetite, impairs oxygen utilization, and causes chronic stress if not stripped from recirculated water.
Position in a RAS Flow
Between biofiltration and oxygenation stages where CO2 accumulates from respiration and nitrification.
How It Works
Water passes through degassing towers or columns where CO2 is stripped via air exchange or vacuum, lowering partial pressure before oxygenation.
Key Design Considerations
- •Size for peak CO2 production at max biomass
- •Consider building ventilation for indoor farms
- •Balance degassing with heat loss in cold climates
Common Mistakes
- •Omitting degassing in high-density fish systems
- •Undersized towers during peak feeding periods
TurnkeyRAS Integration Advantage
Degassing capacity is modeled with species tolerance limits and downstream oxygen transfer efficiency.
Technical Specifications
- Technologies
- Packed column, trickling, vacuum
- Target parameter
- CO2 partial pressure / mg/L
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Integrated recirculating aquaculture systems for high-density grow-out of salmon, tilapia, grouper, and other commercial finfish species.
Explore SolutionsTurnkey RAS for Hot Climate Regions
Energy-efficient RAS designs for high ambient temperature and water-scarce regions, including cooling strategy, insulation, and evaporation recovery.
Explore SolutionsRelated Cases
Hot Climate RAS Project Story
A commercial aquaculture project in the Middle East faced extreme ambient heat, high evaporation rates, and limited freshwater availability. Traditional flow-through or pond systems could not meet biosecurity and water efficiency targets.
TurnkeyRAS delivered a chilled RAS concept with optimized insulation strategy, evaporation recovery planning, redundant oxygenation, and climate-specific automation alarms. Mechanical filtration and biofiltration were sized for peak summer loading.
FAQ
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