Biofiltration
Moving bed and fixed film biofilters engineered for ammonia and nitrite control under commercial feed loading.
What Problem It Solves
Toxic ammonia and nitrite from feed metabolism can cause mass mortality if biological conversion capacity is insufficient or unstable.
Position in a RAS Flow
Downstream of mechanical filtration where dissolved oxygen and low suspended solids support biofilm activity.
How It Works
Nitrifying bacteria colonize biofilter media surfaces, converting ammonia to nitrite and nitrate. Water flow and oxygen transfer maintain active biofilm performance.
Key Design Considerations
- •Size media volume to peak TAN loading
- •Maintain adequate DO in biofilter loop
- •Plan for startup and maturation period
- •Consider MBBR vs. fixed bed for species sensitivity
Common Mistakes
- •Starting biomass before biofilter maturation
- •Insufficient oxygen in biofilter recirculation loop
- •Media clogging due to poor pre-filtration
TurnkeyRAS Integration Advantage
Biofilter sizing is linked to feed plan, species density, and oxygenation design across the full RAS process.
Technical Specifications
- Media types
- MBBR, fixed bed, fluidized
- Design basis
- Feed loading / TAN production rate
- Startup support
- Maturation protocol included
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Hatchery & Nursery Project Story
Inconsistent larval survival and unstable water quality during nursery phases affected production planning. Existing equipment was fragmented with limited automation.
TurnkeyRAS upgraded the treatment loop with refined mechanical filtration, expanded biofiltration capacity, precision oxygenation with supersaturation safeguards, and ozonation with ORP-controlled dosing.
FAQ
Ask for System Matching Advice
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