Water Purification
RO Water Plant
An RO water plant uses a semi-permeable membrane and applied pressure to reduce dissolved salts and produce treated water for the selected drinking or process-water application.
How reverse osmosis works
Water is pressurised against the membrane surface. Water molecules pass through as permeate while much of the dissolved ionic material remains in the concentrated stream.
The pressure and membrane arrangement are selected according to the feed-water salinity, temperature, target recovery and required product-water quality.
Pretreatment protects the membrane
Suspended solids, hardness, chlorine and scale-forming compounds can reduce membrane performance. Pretreatment may therefore include filtration, softening, dechlorination, chemical conditioning and cartridge filtration.
Antiscalant dosing or other conditioning is selected only after reviewing the raw-water analysis.
Typical equipment sequence
- Feed pump transfers raw water to the pretreatment stages.
- Sand, multimedia or cartridge filters remove suspended matter.
- Activated carbon or chemical dechlorination protects chlorine-sensitive membranes where needed.
- A softener or antiscalant programme manages hardness and scale risk.
- The high-pressure pump supplies the membrane array.
- Permeate is monitored and directed to storage or final treatment.
- Reject water is routed according to the site plan.
Controls and features described
- PLC or automatic control options
- High-pressure pump and piping assembly
- Micron cartridge prefiltration
- Conductivity monitoring
- Pressure gauges and flow indication
- Low-pressure and high-pressure protection
- Ultraviolet treatment where specified
- Cleaning and flushing connections
Operating factors
Energy use rises with feed-water concentration and operating pressure. Membrane life and output are also influenced by pretreatment, recovery, cleaning, temperature and the consistency of the incoming water.
Discuss your ro water plant requirement
Share the water source, flow, treatment objective and site conditions with Pure Waters.