Seawater desalination is used to convert seawater into potable water and is being used in many parts of the world. ATI focus on Reverse Osmosis process using thin-film composite membranes and has evolved over the last 20 years and has brought down the cost of desalination. Major improvements in the membranes, energy recovery, pumps and pressure vessels have brought down the cost of desalinated water significantly.
STANDARD FEATURES
- Thin Film Composite Membrane
- Stainless Steel Multistage Pump
- PLC Controls
- Heavy Duty FRP Pressure Vessels
- Industrial Grade Painted Steel Frames
- 5 Microns sediment pre-filter
- Product TDS Monitor
- Permeate/ Concentrated Flowmeters
- Low pressure Protection
- High pressure Protection
- Automatic Inlet Valve
- Hour Meter
- Pre and Post flush
- Panel Mounted instruments and indicators lamps
- NEMA 12/4x control panel
- Pretreatment lock out
- Pump Discharge and Reject throttle valve
- Osmoflo-84 & up include SS 316 high Pressure Plumbing optionally available on Osmoflo-16 to Osmoflo-57
- Osmoflo- 84 & Osmoflo- 114 include Recirculation loop
- Factory Performance Tested
The key technology in the desalination process is Reverse Osmosis. In this process sea water is forced against semi-permeable membranes under pressure in a continuous flow condition. The high salt content of sea water requires that the operating pressure for Reverse Osmosis must be between 60-70 bar. As the water permeates through the membrane most of the dissolved impurities removed and 99.5% of the total salt is removed. The impurities are left behind in the flowing water and the concentrated stream from the membranes is discharged to the ocean. The design of the complete system must optimize the flows, the area of the membranes and other conditions to keep the system operation at the highest efficiency possible.
Applied Membranes has installed a number of Reverse Osmosis Systems for seawater desalination. A typical system consists of filtration, UV, chemical injection followed by reverse osmosis Membranes. The Table below gives typical performance of a sea water system
A successful desalination system requires proper understanding and design to overcome the high salt content and large number of micro-organisms present in the seawater. The high degree of turbidity and corrosiveness of the seawater also requires measures to overcome these. Experience in seawater desalination and recent improvements in energy recovery and low energy membranes has brought the cost of seawater desalination.
