Sea Water Desalination (Sea & Brackish Water)

Seawater covers 71% of the planet surface and represents 97% of the world’s water, Water Technologies supports municipalities and industries around the world in the implementation of their seawater desalination strategies.

World Technologies are expert in Membrane Based Desalination Plants which comprises as below. The RO process uses pressure as the driving force to push saline water through a semi-permeable membrane into a product water stream and a concentrated brine stream. RO, on the other hand, is used for removal of Sodium and Chloride. RO processes are used for desalinating brackish water (TDS>1,500 mg/l), and seawater.

Our seawater desalination technologies are dedicated optimize the management of the water resources. Combined with local presence and a worldwide network of experts, we ensure our clients the best possible solutions to supply high quality water, manage brine concentrates, produce or recover energy, extract raw materials and capitalize on by-products

The Seawater or brackish water desalination plants of all sizes could be on these types of solutions Desalination can be defined as any process that removes salts from water. Desalination processes may be used in municipal, industrial, or commercial applications. With improvements in technology, desalination processes are becoming cost-competitive with other methods of producing usable water for our growing needs.

Osmosis is a natural phenomenon by which water from a low salt concentration passes into a more concentrated solution through a semi-permeable membrane.

When pressure is applied to the solution with the higher salt concentration solution, the water will flow in a reverse direction through the semi-permeable membrane, leaving the salt behind. This is known as the Reverse Osmosis process or RO process. An RO desalination plant essentially consists of below major systems:

Intake screening

As seawater flows into the plant, sediments like seaweed and other large debris are removed via mechanical screens., Chlorine is added to hamper marine growth in pipes and other structures in the system.

High Pressure Pumps

High Pressure Pumps supply the pressure needed to enable the water to pass through the membrane and have the salt rejected. The pressures range from about 150 psi for slightly brackish water to 800 – 1,000 psi for seawater

Reverse Osmosis

Reverse Osmosis is a critical step in the desalination of seawater. After removal of impurities and suspended particles, water is pumped through the semi-permeable membranes at high pressure. Only water molecules can pass through the membranes at this stage.

Pre-Treatment (Micro-filtration / Ultrafiltration)

Pre-treatment is very important in RO because the membrane surfaces must remain clean. Therefore, all suspended solids must be first removed, and the water pre-treated so that salt precipitation or microbial growth does not occur on the membranes. Pre-treatment may involve conventional methods such as a chemical feed followed by coagulation/flocculation/sedimentation, and sand filtration, or pre-treatment may involve membrane processes such as Micro-filtration (MF) and Ultrafiltration (UF).