Abtin Parsian Pishro Company can design and manufacture reverse osmosis (RO) and nanofiltration (NF)  desalination systems separately or in combination with ultrafiltration (UF) systems. Choosing appropriate system and its complementary processes such as chemical treatment, etc. is depend on the use of water (drinking or industrial) and the quality of the incoming water. NF systems can remove divalent ions such as calcium and magnesium and pass monovalent ions such as sodium, while RO systems can remove all ions. Therefore, in order to select a suitable desalination system, a relatively accurate analysis of suspended solids and soluble in feed water should be available. If water has only divalent ions, NF systems can be used, which have lower initial and operational costs than RO systems. But in the presence of monovalent ions in water, the use of RO systems is inevitable.

Desalination by RO and UF Diagram
Desalination by RO and UF Diagram

If in the analysis of water it is found that in addition to ions there are suspended solids with significant concentrations in the water, the use of RO or NF systems alone causes an additional load on these systems, increasing operating costs. , Reduce water production efficiency and reduce the useful life of membranes. In these cases, UF systems can be used as pre-treatment and by producing water free of suspended solids as well as microorganisms that cause clogging, the above problems can be prevented.

Diagram of Desalination by ultrafiltration and reverse osmosis methods
Diagram of desalination by ultrafiltration and reverse osmosis methods

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