Commercial Reverse Osmosis Plant | 1500 LPD

A commercial-scale reverse osmosis desalination plant producing 1500 litres per day (400 GPD) of permeate water — sized for cafés, restaurants, dental practices, light-industrial drinking-water, and small commercial facilities. Dual-membrane configuration with the standard commercial pre-treatment train, automatic flushing, and dual pressure-switch protection.

What 1500 LPD Means in Practice

A residential RO system typically produces 50-75 GPD — about 200-280 L per day, sufficient for a household's drinking, cooking, and hot beverages.

1500 LPD (400 GPD) is roughly 5-7× residential capacity — enough to:

• Supply 50-80 customers per day with filtered drinking water (café scale)
• Feed an espresso machine, ice maker, soda fountain, and customer water in a typical food-service site
• Run a dental practice's irrigation and equipment-feed needs
• Supply a 20-30-bed nursing home's drinking-water requirements
• Feed laboratory equipment needing low-TDS water at moderate volumes

For higher demand, step up to the 3000 LPD (800 GPD) model or the 3000 LPD with pressure tank.

System Configuration

• Membranes: 2 × TFC-2013-200 (thin-film composite, 2.5" × 20")
• Membrane vessels: 2 × 2013 plastic vessels
• Pumps: 36V DC pumps — quiet, low-vibration, energy-efficient
• Rejection rate: 98% (tested at 8% recovery, 1000 mg/L NaCl feed, 150 PSI, 25°C)
• Approximate feed flow: 0.3 m³/hr
• Approximate permeate flow: 0.062 m³/hr
• Approximate recovery: 18-30% (varies with feed water characteristics)
• Inlet EC limit: < 1500 µS/cm (per membrane manufacturer recommendations)

Pre-Treatment Train

Standard commercial 20" big-blue cartridge pre-treatment in series:

1. 20 µm sediment (2.5" × 20") — removes particulate down to 20 microns
2. 5 µm GAC carbon (2.5" × 20") — chlorine and chemical reduction, granular activated carbon
3. 5 µm CTO carbon (2.5" × 20") — secondary chlorine reduction, carbon block

Three-stage pre-treatment is essential at commercial scale — chlorine destroys TFC membranes within weeks, and sediment fouls them within months. Two carbon stages provide redundancy against chlorine breakthrough.

Control and Protection

• Automatic flushing — periodic flushing of the membrane to clear concentrated reject before it scales the membrane surface
• High-pressure switch — stops the pump when permeate tank is full or downstream pressure rises
• Low-pressure switch — stops the pump if supply water fails (dry-run protection)
• Provisions for a pressure tank — connect a permeate storage tank to buffer demand

Connections and Dimensions

• Inlet: 3/8"
• Concentrate (reject): 3/8"
• Permeate (product): 3/8"
• Compression brine: 1/2"
• Dimensions: H 77 × W 42 × D 26 cm

Pre-Sale Water Analysis Recommended

"Before selecting an RO we request a water analysis report for the intended site so we can ensure the unit is suitable." Inlet TDS, hardness, iron, manganese, and chlorine levels all affect system sizing and pre-treatment requirements. A wrong system choice based on assumed-rather-than-tested water can result in rapid membrane fouling, inadequate output, or excessive reject ratio.

Contact our team with a water analysis report before final commitment for commercial installations.