Reverse Osmose explain

Reverse Osmose Panel

Reverse Osmose Explain

Reverse osmose, short explanation : 

Reverse osmose (RO) is a filtration process in which the water to be treated is pressurized and applied against the surface of a semipermeable membrane in order to demineralize it and remove it’s impurities. RO filtration removes more material from water than standard filtration. The use of RO can reduce the amount of conventional chemical treatment needed for boiler feedwater. Room temperature water is required to maintain the ability of water to pass through the membranes at a controlled rate. Which is my we make a mixing valve at Polytechnique on the softener. 

Concentrate flow : Represent the flow of water in LPM (Liter per Minute) or GPM (Gallon per Minute) that is rejected in the drain, because it has not been filter through the reverse osmose process.

Permeate Flow : Represent the flow of water in LPM (Liter per Minute) or GPM (Gallon per Minute) that is filtered by the reverse osmose process and send into the osmose tank to be use by the condensate tank (and boiler).


What is the percentage of water rejected into de sewer ?

Permeate flow is 34 L/M
Concentrate flow is 11 L/M.
So 11/34 *100 = 34 %

Meaning that 34 % of the water is not filter with the reverse osmose process and is rejected into the drain (concentrate).

Final pressure gauge : Pressure of concentrate water at the end of the osmose filter. Gauge is after the reverse osmose filter. Was measure at 240 PSI on the gauge.

Primary pressure gauge : Pressure of water not yet filter by the reverse osmose process. Gauge is after the pump, but before the osmose filter. Was measure at 255 PSI on the gauge.

Pre-filter pressure gauge : Pressure indicated before the cartridge filter. Was measure at 32 PSI on the gauge.

Post-filter pressure gauge : Pressure indicated after the cartridge filter. Was measure at 27 PSI on the gauge.


Let’s see then :

• We can see that the pressure AFTER the filter (cartridge or reverse osmose) is lower that the pressure before the filter (cartridge or osmose)
• Water pressure at the pre-filter gauge is 32 PSI and when water pass into the pump it become 255 PSI!! That is because the reverse osmose process need pressure to do it work. It filter the water with pressure, because it’s an reverse osmose process.
• Water at the end of softener is 80 PSI, but before it enter the cartridge filter, it’s 32 PSI. Why ? Because reverse osmose is on the second floor and water also pass into a charcoal filter. So the pressure decrease. 
• The output at the reverse osmose Pump is smaller than the input (which is bigger). Why ? Because we want to increase the pressure from 27 PSI to 255 PSI. Making the output of the pump smaller help to achieve increase in pressure.