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.

What This System Targets

This system uses reverse osmosis (RO) plus sediment/carbon pre-treatment. In addition to reducing sediment, chlorine, taste and odour before the membrane, RO membrane technology can reduce total dissolved solids and many dissolved contaminants, including salts and hardness minerals such as calcium and magnesium. RO is also used for reduction of contaminants such as fluoride, nitrate, arsenic, lead, copper and chromium.

RO membranes are also capable of removing protozoa, bacteria and viruses when the membrane and seals are intact and the system is correctly operated and maintained.

For under-sink systems, hardness and scale reduction applies to the treated drinking-water outlet only; it does not soften the rest of the home.