Seawater entering the desalination plant goes through spin down screens filter to remove suspended solids and debris, then gets injected with oxidants and coagulators to purify sea water as in many parts of the world waste water is dumped into the sea, leading to the contamination of seawater. In this process, chemicals are added to the seawater to make algae, organic materials and particles bond together so they can be removed more easily in the filtration stage that follows.
In the next stage, seawater goes through automatic backwash Sand Filters to catch all the suspended solids, algae and organic materials that has bonded together.
Then Seawater goes through Automatic Backwash Activated Carbon Filters to reduce color and smell, as well adjust pH level of seawater.
Finally the seawater goes through a series of 5 micron Sediment Filters to remove silt and fine particles that may be remaining after the pretreatment process.
Seawater Desalination Reverse Osmosis Watermaker Process:
The Seawater Desalination Reverse Osmosis Process also known as SWRO process starts with High Pressure Pumps that forces the pretreated seawater through a set of semi-permeable membranes at high pressure to separate the freshwater from the seawater.
The size of the Seawater RO membrane pore is .002 microns, which is about 1/100,000th the diameter of a human hair.
After the Seawater Desalination Reverse Osmosis Process, Fresh Water goes through Activated Carbon Post Filters, to improve Taste Odor and Clarity, then through pH adjust post-filters, then finally, through an Ultra Violet sterilizer to ensure water is totally disinfected and pure. Chlorine is usually added where the water is stored to stabilize the fresh water produced.