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What could be the cause of RO membrane water smell?


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#1 Rol Natty

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Posted 17 December 2020 - 12:07 AM

We have water treatment system currently we have face a problem of water smell on the Ro membrane especially when there is long time stoppage of Ro and also after Ro treatment the ph of water is not reduced also we got 11.5 we are starting dosing citric acid also for ph reduction. Our Raw water have high ph 12 and high conductivity 230-250 our water treatment system have sand filter-activated carbon filter-sodium ion exchanger-micro filter 0.5-Ro-UV sterilizer-titanium filter. What will be possible cause of this and the solution I need your help urgently. Thank you all


Edited by Jacob Timperley, 18 December 2020 - 03:31 PM.


#2 jdpaul

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Posted 18 December 2020 - 02:23 PM

What is your process for changing out the membranes? It is very easy to get microbiological/bio-film contamination in the membrane

 

Do you have a flow diagram to attach?



#3 Rol Natty

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Posted 19 December 2020 - 06:26 PM

We are not changing until now the Ro membranes

I don’t have the flow diagram but

Raw water tank-sand filter-Ac filter-sodium ion exchanger-MIcro filter-Ro-UV-finished water tank-Titanium filter this is the process


Edited by Rol Natty, 19 December 2020 - 06:27 PM.


#4 EagleEye

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Posted 20 December 2020 - 07:19 AM

You may try to change the membrane and observe. And in the future, you may need to change it frequently.

Microbiological biofilm formation could be the reason which will happen very often.



#5 jdpaul

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Posted 21 December 2020 - 12:22 PM

You might also consider taking samples at each step in the process to narrow down where the smell is coming from. Pull samples at each step for micro testing and sensory

 

Do you have an HPLC?



#6 Rol Natty

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Posted 21 December 2020 - 10:20 PM

I don’t have HPLC
But I take from each step samples to smell but each step have no off odor I got only bad smell on the Ro membrane






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