Industrial Nano Membrane Filter assembly for Drinking Water Treatment Methods

RO and NF membrane have the following differences:

1. Different filtering precision Reverse osmosis can remove the smallest solute with a molecular weight of less than 0.0001 microns. Due to its high filtration accuracy, it can filter out bacteria and various impurities in water. It is generally used in the manufacture of household purified water, industrial ultrapure water and medical ultrapure water. Nanofiltration can remove solutes with a molecular weight of about 0.001 microns, and is used in environments with slightly lower filtration accuracy requirements. It is generally used for water softening, micro-pollution desalination and the manufacture of industrial pure water.

2. Different desalination rates The desalination rate of reverse osmosis technology is 99.5%, which can effectively intercept all dissolved salts and various organic substances with a molecular weight greater than 100, while allowing small molecular groups to pass through. The nanofiltration system adopts the method of cross-flow filtration, and the desalination rate is between 80 and 90%. It is mainly used for the concentration and purification of macromolecular substances.

3. The proportion of "wastewater" produced is different Both reverse osmosis and nanofiltration purify water by pressurizing and electrifying, but the reverse osmosis technology due to the different composition of the membrane, the wastewater produced by reverse osmosis is 1:2-1:3, and the wastewater ratio of nanofiltration is 1:1: 1. In terms of water saving and environmental protection, reverse osmosis technology is more resource-intensive. Compared with nanofiltration technology, it has the advantages of partial removal of monovalent ions, low process osmotic pressure, low operating pressure, and energy saving.

Nanofiltration membranes can retain nanoscale (0.001 micron) substances. The operating range of the nanofiltration membrane is between ultrafiltration and reverse osmosis, the ability to intercept dissolved salts is between 20% and 98%, and the removal rate of soluble monovalent ions is lower than that of high-valent ions. Nanofiltration is generally used to remove surface Organic matter and pigments in water, hardness and radium in groundwater, and partial removal of dissolved salts, extraction and concentration of useful substances in food and pharmaceutical production. The operating pressure of the nanofiltration membrane is generally 3.5-30 bar.

1. When PH is above 10, the Maximum Temperature of Continuous Operation is 35ºC.
2. Under certain conditions, the presence of free chlorine and other oxidants in the water may cause serious membrane damage, which doesn't belong to product warranty range.

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