High Silicon in my RO/DI Water

[NDIrish]

Need help to get my silicon in my RO/DI down. It was 5294 ug/l from my test results.
I have a silicate buster as the last filter on my unit.
Also need lower it in my tank, 370.4 ug/l. Have some ugliest in my tank I believe is from my silicon being high.
N03 is 4.14, P04 is .04.

Thanks

 

[thatmanMIKEson]

Need help to get my silicon in my RO/DI down. It was 5294 ug/l from my test results.
I have a silicate buster as the last filter on my unit.
Also need lower it in my tank, 370.4 ug/l. Have some ugliest in my tank I believe is from my silicon being high.
N03 is 4.14, P04 is .04.

Thanks

Where's the silicone coming from?

 

[NDIrish]

Where's the silicone coming from?

Don't know. That's what i'm asking for help. Everything else in my RO/DI water tested 0.
I'm assuming what showed up in my tank is coming from my RO/DI.

 

[Woodyman]

Don't know. That's what i'm asking for help. Everything else in my RO/DI water tested 0.
I'm assuming what showed up in my tank is coming from my RO/DI.

How many DI stages do you use?

What type?

Do you change when you start registering 1 TDS out? Silicone is going to be one of the weaker bound ions bound by DI, so it will be one of the first to bleed back into your product water.

 

[NDIrish]

I have 2 DI stages, one anion and 1 cation.
Yes, when it registers a one.

 

[Woodyman]

I have 2 DI stages, one anion and 1 cation.
Yes, when it registers a one.

You should run a mixed bed after the single stages as a final polish and to catch any remnants.

 

[NDIrish]

I can do that if it will resolve my issue.

 

[Woodyman]

I can do that if it will resolve my issue.

How quickly do you send water through the DI stages?

 

[NDIrish]

Don't understand what your asking, sorry.

 

[Woodyman]

Don't understand what your asking, sorry.

How strong of a flow is going through your DI stages. Is it a trickle or steady stream.

Another thing that could be the cause is if your not giving the water enough contact time through the resin.

 

[NDIrish]

I have Approx. 80 psi.

 

[Woodyman]

I have Approx. 80 psi.

Into your RO membrane I assume..

Or going into your DI!?

 

[NDIrish]

Yes, ro membrane.

 

[Woodyman]

Yes, ro membrane.

How many TDS meters do you have, and where are they placed in the system?

 

[NDIrish]

I have one. It checks the input and output.

 

[Woodyman]

I have one. It checks the input and output.

Running separate beds you should check after each stage anything missed by the first stage will never get pulled out from the second when running mixed. That's why a third stage of a mixed bed is needed.

The third stage should solve your issue, if your tap water is high in silica you may want to consider a specialized cartridge for silica absorbance. Either way separate beds followed by a mixed should correct your issue.

What manufacturer of resin are you using? I noticed you mentioned 'silica buster' which is not a separate bed but a mixed bed cartridge from Spectrapure. Are you using the silica buster or true separate resin beds?

 

[NDIrish]

I use BSR DI resins. My silicate buster as last after the resins.

 

[Woodyman]

I use BSR DI resins. My silicate buster as last after the resins.

So you are already using 3?

 

[NDIrish]

If your counting my silicate buster has one of may resins, then yes.
I thought silicate buster was different..

 

[Woodyman]

SpectraPure® SilicaBuster DI Cartridge - Non-Color-Indicating - 10" -

High Quality Filters produce High Quality Water! SpectraPure‚'s Custom Blended DI Cartridges Remove the Highest Amount of Ionized Impurities out of any DI on the market! Hand-Tested and Manufactured in the US! Get the BEST! Trust SpectraPure‚ for all of

spectrapure.com

That one correct? Or a variety of it, doesn't matter.