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The Main Process Flow of a Reverse Osmosis Installation

Author: Site Editor     Publish Time: 2022-05-17      Origin: Site


1. Raw water tank (optional)

Storage of raw water for precipitating large sediment particles and other precipitable materials in the water. Also buffers the shock to the water treatment system caused by unstable water pressure in the raw water pipe. (e.g. response to pressure sensing caused by too low or too high water pressure).

2. Raw water pump

Constant system water supply pressure, stable water supply volume.

3.Multi-media filter

The main purpose of the multi-media filter is to remove the sediment, rust, colloidal substances, suspended matter and other particles above 20um contained in the raw water, which can be controlled by manual valves or fully automatic controller for a series of operations such as backwashing and positive flushing. To ensure the quality of the water produced by the equipment and to extend the service life of the equipment.

4. Activated carbon filter

The system uses a shell activated carbon filter. Activated carbon not only adsorbs electrolyte ions, but also performs ion exchange adsorption. The adsorption of activated carbon can also reduce the oxygen consumption of potassium permanganate (COD) from 15mg/L (O2) to 2~7mg/L (O2), in addition, the adsorption effect increases the concentration of the adsorbed copy on the surface, so it also plays a catalytic role, removes pigment, odour, a large number of biochemical organic substances in the water, reduces the residual chlorine value of water and pesticide pollutants and removes trihalide (THM) and other pollutants in the water. and other contaminants. Manual valve control or fully automatic control for backwashing and forward rinsing is available. This guarantees the quality of the water produced and extends the service life of the plant. At the same time, the plant has a self-maintenance system and low operating costs.

5. Ionic softening system / dosing system

In order to prevent the concentration of CaCO3, MgCO3, MgSO4, CaSO4, BaSO4, SrSO4, SiSO4 on the concentrated water side of the RO unit, especially on the concentrated water side of the last membrane module, from being greater than the equilibrium solubility constant and crystallizing and precipitating, which could damage the properties of the membrane element, an ion softening device or an appropriate amount of scale inhibitor should be used before entering the RO membrane module. Before entering the reverse osmosis module, an ionic softening device or an appropriate amount of scale inhibitor should be used to prevent the precipitation of carbonate, SiO2 and sulphate crystals.

6. Precision filter

A precision filter is used to remove suspended matter, non-curved particles and colloids and other substances remaining in the incoming water, making the operation of subsequent equipment such as RO systems safer and more reliable. The cartridge is a 5um meltblown cartridge, the purpose of which is to remove impurities larger than 5um that are missed by the upper filter unit. It prevents them from entering the reverse osmosis unit and damaging the surface of the membrane, thus damaging the desalination performance of the membrane.

7. Reverse osmosis systems

Reverse osmosis device is to use enough pressure to make the solvent in the solution (usually water) pass through the reverse osmosis membrane (or semi-permeable membrane) and separate out, because this process and natural osmosis in the opposite direction, so called reverse osmosis. The reverse osmosis method can be adapted to all types of raw water with salinity, especially in water treatment projects with high salinity, and can achieve good technical and economic benefits. Reverse osmosis method of high desalination rate, high recovery rate, stable operation, small footprint, easy to operate, reverse osmosis device in the removal of salt, but also most of the bacteria, colloids and large molecular weight of organic matter removed.

8. Ozone sterilizer / ultraviolet sterilizer (optional)

Kill the bacteria generated by secondary pollution to ensure the hygiene index of the finished water.


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