- Modular Process Equipment Design
- Water Treatment Equipments & Consumable Parts
- Chemical Products Applications
1 Pass RO System (ROC System) & 2 Pass RO System (DRA System)
1 Pass RO System (ROC System)
Reverse osmosis (RO) is a process of forcing a solvent from a region of high solute concentration through a semipermeable membrane to a region of low solute concentration by applying pressure in excess of the osmotic pressure.
ROC system is a standard skid unit of 1 pass RO system that consists of high pressure pumping unit and membrane element assembly unit. ROC system has the ability to purify water by removing salts, contaminants, bacteria, particles and other impurities to produce ultra pure water.
Pretreatment system such as ultrafiltration or microfiltration and activated carbon filter are required to get the basic feed water quality for ROC system.
Common applications of ROC system are purified water in food and pharmaceutical industry, heavy metal recovery, water purification for power generation industry and ultra pure water in semiconductor industry.
2 Pass RO System (DRA System)
In some cases where there is high salinity feed water or low salinity permeate, ROC system may not capable to produce the permeate water with required salinity.
In order to achieve the required permeate salinity, the permeate water produced by one pass RO is desalted again in second RO system. This configuration is called 2 pass RO system (DRA system) which is composed of two high pressure pumping unit and two pass RO membrane element design. Pretreatment system such as ultrafiltration or microfiltration and activated carbon filter are required to get the basic feed water quality for DRA system.
Typical applications of DRA system are for purified water in manufacturing and beverage industry, water purification for boiler feed water and ultra pure water system for electronics industry.