Water desalination systems - Import export

Sea Water Reverse Osmosis SWRO

A "CO2 degasser" (degassifier) is a relatively simple water treatment device. Incoming water is sprayed into a tower filled with packing material. The drops of water that flow down through the tower strike the packing material and form a thin film on the packing material surface, encouraging the release of excess carbon dioxide. A centrifugal fan creates an updraft of air through the tower to carry away the released carbon dioxide gas. The carbon dioxide gas exits through a vent at the top of the unit.

Both cation and anion resin can be feed in to an ion exchanger tank and mixed to create a mixedbed ion exchanger. A mixedbed ion exchanger is more complicated than other types of ion exchangers because it has to separate and regenerate the two resins. The carefull mixing of the cation and anion resin allows a very high degree of deionization. Mixed bed ion exchangers produce the highest quality demineralized water of any of the ion exchanger units. Working mixedbed ion exchangers deionize water with up to 50 ppm TDS (Total Dissolved Solids). Polishing mixedbed ion exchangers are located after cation and anion exchangers or reverse osmosis units Strong acid cation and strong base anion resins are used in mixedbed ion exchangers, as complete demineralization is the objective. A small volume of inert resin can also be used to facilitate separation of the cation and anion resin beads during regeneration