Reverse Osmosis is used to desalinate the water to make it potable. RO plants with three different types (River , Well & Seawater ) are used in wide sectors and different applications mainly fro drinking , irrigations , industrial , food and many other places where there is a need to pure water .

RO PROCESS DESCRIPTION

  • The water is pumped from source to the different pre-treatment units to achieve the chemical-physical improvement before reaching the reverse osmosis membranes. Feed water pressure will be approximately 5 bars. Chemical pre-treatment consists of the passing of water through an activated carbon and media filter, to remove the residual chlorine and organic compounds and any suspended solids responsible of taste and odors and to protect the membranes from possible high levels of chlorine which may be in the mains water. Afterwards, the de-chlorinated water is dosed with anti- scaling to avoid precipitation of Calcium salts on the membranes. Besides protecting the reverse osmosis membranes, it helps to reduce the frequency of cleanings.
  • The proposed physical pre-treatment is a micro filtration using a wound polypropylene cartridge with 5-μm selectivity. This ensures the removal of all particulate matter and colloidal substances.
  • The preconditioned feed water passes to a high pressure-pumping unit a pump that boosts the pre-treated water to the reverse osmosis unit. Inlet feed water design pressure to the pump will be about 5 bars.


Outlet pressure from high-pressure pump will be (?) bars as maximum. To avoid damage to the high pressure pump due to low pressure on the feed side, a low pressure switch is installed before the pump that will automatically stop the system. In the same way, to avoid overpressure on the reverse osmosis membranes, another pressure switch will be installed, after the high-pressure pump that will automatically stop the system in case of exceeding the maximum design pressure.

Reverse osmosis unit is formed by Two pressure vessels and Membrane elements. Vessel has an intake and two outlets (one for permeate and the other one for concentrate). Membranes are protected when plant stops with a system of concentrate dilution, known as flushing. The reject from plant will be evacuated to the drain.
 

   

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