The calculation method and precautions for the desalination rate of reverse osmosis (RO) membranes-Yuanlai Water Treatment

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The calculation method and precautions for the desalination rate of reverse osmosis (RO) membranes

Released Date: Nov 26,2015 Article Source: Yuanlai Water Treatment

Reverse osmosis (RO) membranes are the core components for achieving reverse osmosis. They are artificial semi-permeable membranes with certain characteristics made by simulating biological semi-permeable membranes. The pore size of reverse osmosis (RO) membranes is extremely small, thus they can effectively remove dissolved salts, colloids, microorganisms, organic matter and other substances from water. The system has the advantages of good water quality, low energy consumption, no pollution, simple process and easy operation. The desalination rate is one of the key factors determining the performance of reverse osmosis (RO) membranes. Now let's talk about the calculation method of the desalination rate of reverse osmosis (RO) membranes. The common test conditions for desalination rate are 225psi (15.5bar), a test solution concentration (NaCl) of 2000ppm, and a recovery rate of 15%. Ii. Calculation Method of Desalination Rate Desalination rate =1- (effluent conductivity/Influent conductivity), for example: Influent conductivity 300, first-grade fresh water 10

Reverse osmosisROMembrane is the core component for achieving reverse osmosis. It is an artificial semi-permeable membrane with certain characteristics, which is made by simulating biological semi-permeable membranes. Reverse osmosisROThe pore size of the membrane is extremely small, thus it can effectively remove dissolved salts, colloids, microorganisms, organic matter and other substances from water. The system has the advantages of good water quality, low energy consumption, no pollution, simple process and easy operation. The desalination rate is decisiveReverse osmosisROOne of the keys to membrane performanceNow let's talk about reverse osmosisROmembraneThe calculation method of desalination rate.

I.Test conditions for desalination rate

Regularly test the pressure225psi(15.5barTest the concentration of the solutionNaCl"For2000ppmThe recovery rate is15%.

Ii.The calculation method of desalination rate

Desalination rate=1-(Conductance at the outlet water/Influent conductanceFor example:Inlet water conductance300First-class fresh water10Grade 2 fresh water2Then

First-level desalination rate=1-(10/300)=96.7%

Secondary desalination rate=1-(2/10)=80%

The overall desalination rate of the second gradeThe calculation is1-(2/300)=99.3%

NoteThere is another concept of relative desalination rate called salt penetration rate, salt penetration rate=1-Desalination rateIf there is a reverse osmosisROMembraneThe stable desalination rate is99.5%Another kindReverse osmosisROmembranetheStabilize the desalination ratein99.3%Then the formerThe salt penetration rate is0.5The latter is0.7There are differences between the two1.4There are many times as many, so reverse osmosis is chosenROWhen applying the membrane, pay more attention.

The above isReverse osmosisROmembraneThe calculation method of desalination rate, if in reverse osmosisROIf you have any questions about membrane selection, please consult Beijing Yuanlai Water Treatment Equipment Co., LTD., which focuses on the water treatment industry15In this year, you can trust us!

Keywords: Water Softening Equipment Automatic Water Softener Reverse Osmosis Equipment Manufacturer of Water Treatment Equipment

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