agricultural water treatment systems with an automatic backwash activated carbon filters|GAC

Remove residual chlorine agent GAC|Automatic backwash activated carbon filters in agricultural water treatment systems

Activated Carbon Filter Media Selection and Dosage Calculation

Recommended filter media: 12x40 mesh or 8x30 mesh coconut shell granular activated carbon. Coconut shell activated carbon has superior adsorption kinetics for residual chlorine and lower ash content, making it more suitable for agricultural irrigation.

Empty bed contact time: EBCT ≥ 5 minutes, which is crucial for ensuring efficient removal of residual chlorine.

Activated Carbon Bed Volume Calculation:

EBCT (min) = Activated Carbon Bed Volume (m³) / Flow Rate (m³/min)

Activated Carbon Bed Volume = EBCT × Flow Rate = 5 min × (15 m³/h ÷ 60) ≈ 1.25 m³

Required Activated Carbon Weight:

Weight = Activated Carbon Bed Volume × Bulk Density

Weight = 1.25 m³ × 450-550 kg/m³ ≈ 560 - 690 kg

Final Recommendation: To ensure performance and allow for margin, a filling weight of 700 kg of 12x40 mesh coconut shell granular activated carbon is recommended.

Filter Tank Size Estimation

To accommodate a 1.25 m³ activated carbon bed, and considering expansion space during backwashing (typically requiring an additional 30-50% free space), a fiberglass (FRP) tank with a diameter ≥800 mm and a straight section height ≥2.5 m is recommended.

Connection: Fully compliant with 3-inch (DN80) flanges.

Recommends: Coconut shell based activated carbon 12*40mesh   Iodine value 1000mg/g   Unit price: FOB China Port 1.8 USD per KG.

Package with 25kg black woven bag or 500KGS big bag

Loading quantity: 12,000 KGS for 20 feet container, 20,000 KGS for 40HQ

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