30 Tonne/Day Reverse Osmosis System

The 30 Tonne Reverse Osmosis System comes with the components needed for production ready-assembled on a single frame.

The 30 Tonne Reverse Osmosis System suits medium-sized sites that need 30 m³ of low-TDS water a day.

Factories & Production PlantsFood & Beverage ProductionHotels & AccommodationHousing Estates & Residential CommunitiesProcess Water LinesBoiler Feed Water LinesCar Wash FacilitiesGreenhouses & Soilless Growing

The 30 Tonne Reverse Osmosis System relies on a pressure-driven membrane separation process. In its overview of treatment technologies, the US Environmental Protection Agency (EPA) defines reverse osmosis as the process in which water is passed through semi-permeable membranes at high pressure, with the part that passes through the membrane separated as product water (permeate) and the part that does not as concentrate.

1. 1

   Pre-Treated Water Inlet

   Water that has passed through the sand, carbon and softening stages enters the unit at 2–5 bar. A solenoid valve opens the inlet, and a low-pressure switch monitors the inlet pressure.

2. 2

   Through the Cartridge Filter

   Before the pump, the water passes through the 5 micron cartridge filter; fine particles are held back here, protecting the pump and the membranes.

3. 3

   Pressure Boost

   The vertical-shaft high-pressure pump raises the water pressure to the 9–12 bar range the membranes need.

4. 4

   Separation in Six Membranes

   The pressurised water passes through six 4040 membranes. As the water molecules pass through the membrane, most of the dissolved salts stay on the membrane surface and are carried away with the concentrate stream.

5. 5

   Product Water and Concentrate

   The product water passes the flow meter and conductivity meter on its way to the storage tank, while the concentrate goes to drain through a regulating valve. Standard recovery is 50%: 60 m³ of feed gives 30 m³ of product water.

When choosing the 30 Tonne Reverse Osmosis System, the daily requirement, the feed water volume, the water analysis and the installation conditions should be assessed together.

The 30 Tonne Reverse Osmosis System runs steadily with the right pre-treatment and regular monitoring.

• The cartridge filter should be checked regularly and replaced when it is dirty or when the pressure difference between the filter inlet and outlet rises.
• Product water flow and conductivity should be recorded regularly; a drop in flow or a rise in conductivity can point to membrane fouling.
• When output falls, the membranes are restored by chemical cleaning (CIP); a manual or automatic CIP unit can be added as an option.
• The backwash and regeneration settings of the sand, carbon and softening units should be checked regularly; chlorine must not reach the membranes.
• In water with a hardness or silica risk, antiscalant dosing should be planned separately; a dosing system is not part of the standard equipment.
• The feed water temperature should be kept within 10–30 °C, and the unit protected against the risk of freezing.