Reverse Osmosis Water Treatment System
A reverse osmosis system sized on peak hourly demand rather than daily volume, with pre-treatment that protects the membranes and recovery that keeps water cost down.
Key Specifications
| Capacity | 1 - 50 m3 per hour permeate |
|---|---|
| Pre-treatment | Multi-media, activated carbon, 5 µm cartridge |
| RO configuration | Single or two pass, 99 percent rejection |
| Recovery | 65-75 percent depending on feed TDS |
| Control | PLC with conductivity and flow trending |
| Antiscalant | Dosing with ORP monitoring |
| Outlet | Conductivity < 10 µS/cm on two-pass |
Pre-treatment decides membrane life
Chlorine destroys polyamide membranes permanently, so activated carbon or bisulphite dosing is mandatory upstream. Turbidity and hardness cause scaling. Most premature membrane failures trace to inadequate pre-treatment, not to the membranes themselves.
Sizing on peak, not average
A beverage line draws water in bursts during CIP and shift start. Sizing the RO on daily volume produces a plant that cannot keep up at peak and needs a larger storage tank than the RO it saved.
Recovery and concentrate handling
Rejecting 30 percent of feed is normal, but that concentrate has to go somewhere. Recycling it to the front of the plant or using it for non-product duties cuts net water use substantially.
Typical Applications
- Beverage plants using municipal water — RO standardises incoming water so product taste does not vary with the supply.
- Boiler and cooling make-up — Demineralised water prevents scale and extends boiler life.
- Whey and juice concentration — RO preconcentrates before evaporation, cutting evaporator energy demand.
Related Equipment
Frequently Asked Questions
How much water does it waste?
25-35 percent of feed becomes concentrate. With recycling, net use falls to 10-15 percent above permeate volume.
Do I need EDI?
Only if you need resistivity above 1 MΩ·cm, such as for boiler feed or certain formulations. Drinking water does not require it.
What maintenance is required?
Cartridge changes every 1-3 months, membrane cleaning every 6-12 months, and annual membrane replacement at 15-20 percent of the array.
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