Core Functions of Drum Filterin Recirculating Aquaculture Systems

I. High-Efficiency Physical Filtration for Suspended Solids Removal  
Mechanism:  
Drum Filter utilize 30-200 μm mesh (typically 60-200 μm) to mechanically remove total suspended solids (TSS), including residual feed, fish feces, and organic debris, thereby reducing organic load.  

Benefits:  
In seabass farming, microscreens can reduce suspended solids by >50%, significantly improving water clarity. This prevents oxygen depletion and ammonia accumulation caused by organic decomposition, directly enhancing fish health.  

II. Optimization of Biological Treatment Efficiency  
Synergistic Effect:  
As a pre-treatment unit for biofilters, microscreens remove fine particles missed by sedimentation tanks, reducing organic load on biofilters by 30-40%.  

Microbial Balance Control:  
By regulating organic concentrations, microscreens suppress heterotrophic bacteria overgrowth while promoting nitrifying bacteria dominance. This extends biofilter media lifespan by >20% and increases ammonia removal efficiency by 15-25%.  

III. Enhancement of UV Disinfection Performance  
Synergistic Improvement:  
Microscreen pre-treatment increases water transmittance by 60-80%, allowing 2-3x deeper UV penetration.  

Performance Comparison:  
- Without microscreens: UV sterilization rate = 70-80%  
- With microscreens: UV sterilization rate = 95-99%  
This significantly improves pathogen inactivation while reducing UV system energy consumption by 10-15%.  

IV. Water Quality Improvement & Resource Recycling  
Key Parameter Enhancements:  
- SS removal rate: >85%  
- COD/BOD reduction: 30-50%  
- Water clarity: Increased from <30 cm to >50 cm  

Circular Economy Benefits:  
Filtered water meets reuse standards, achieving >80% water recycling rates and 40-60% freshwater savings compared to traditional systems.