RO design to reduce fouling

Dear experts,

In two stages RO design, if we keep the flux of both stages near together (by flux balancing methods), is that a good option to decrease the first stage fouling (lead membrane) and second stage scaling (rear membranes)?

Taxonomy

• RO Systems
• Reverse Osmosis
• Reverse Osmosis
• RO & MSF Fouling
• Forward Osmosis
• Plant Economics
• Desalination plant operations coordinator

5 Answers

1. Yup. That would help. But that may affect the final permeate conductivity. Please also consider the life of membranes because based on types of membranes it may affect their life significantly. 

   1 Comment

   1. What is its relation with membrane lifetime? are you talking about second stage membranes?

2. Dear Ali,
   
   Good option but of ourse it will depend on the final parameters to reach and of course the pretreatment will be important.
   We distribute a microfiltration technology used as pretreatment that does not use membranes and that can be used as a prefiltration step from the raw water in RO systems.
   
   If interested, you can contact to this email info@geo-future.com 
   
   Regards,
   
   Orlando D. Gutiérrez Coronado

3. Pretreatment of Influent is key by reducing or eliminating membrane loadings and If Interested I have an interesting & New Technology to eliminate loadings for RO Systems. 

   1 Comment

   1. Yes, sure, you can send me an email.

      salmani.eng@gmail.com

4. Pretreatment of Influent is key by reducing or eliminating membrane loadings and If Interested I have an interesting & New Technology to eliminate loadings for RO Systems. 

5. Keeping the stage fluxes balanced is good but keeping the average system flux at the low end of the design guideline range for a certain feedwater type helps a lot. Good pretreatment is essential to prevent foulants from reaching the RO in the 1st place.  Cheers