1. The type of filter material determines the filtration accuracy
Quartz sand: Low cost, but easy to compact (20-40 μ m accuracy)
Diatomaceous earth: High precision (1-5 μ m), poor resistance to oil and grease, requiring frequent maintenance
AFM active filter material: Strong anti pollution, lifespan of 10 years+(5-10 μ m accuracy)
Paper core filter: prone to clogging, needs to be replaced regularly
Selection suggestion: AFM or quartz sand is preferred for public swimming pools, and diatomaceous earth is used for competition pools
2. The filtration speed directly affects the retention rat
Low speed (<10m/h): Clearest effluent (turbidity of 0.1NTU), high equipment cost
Medium speed (10-25m/h): Ideal speed for public swimming pools (recommended ≤ 20m/h)
High speed (>30m/h): only suitable for household use, particle penetration rate skyrockets
Optimization strategy: Double layered quartz sand filter material can improve efficiency by 30%
3. Dynamic adjustment of operating parameters
Differential pressure control: If it exceeds 0.5kg/cm ², it must be backwashed
Water temperature effect: enzymes need to be added to decompose oil and fat when the temperature is above 30 ℃
Backwash key: cooperate with positive washing drainage to prevent impurities from returning to the swimming pool
4. Targeted treatment of pollutant
Small particles (0.1-0.4 μ m): flocculants are added to agglomerate and intercept
Oil pollution: Use lipase decomposer every week to avoid filter failure
Solid vs liquid: Liquid particles are more prone to escape and require special filter materials
5. Maintenance strateg
Backwash cycle:
✓ Regular passenger flow: 7-10 days/time
✓ Peak passenger flow: 3-7 days/time
Filter material replacement signal:
✓ Quartz sand: 0.5mm broken particles exceeding 20%
✓ Filter pressure difference reaches twice the initial value