Using DI water only in the LMD.... why not?

[Jason McK]

I'd be very curious to find out what stage of our 5 stage units is removing most DS. simpley removing the RO membrane may not be the best proof that the DI is the filter since we all have a carbon filter and a pre filter. Could it be possible that in GVRD a prefilter carbon filter and DI is all that is required?

J

[Chin_Lee]

Originally Posted by Jason McK

I'd be very curious to find out what stage of our 5 stage units is removing most DS. simpley removing the RO membrane may not be the best proof that the DI is the filter since we all have a carbon filter and a pre filter. Could it be possible that in GVRD a prefilter carbon filter and DI is all that is required?

J

i think thats probably the key there Jason. On my RO filter, I added two prefilter stages with 30 and 10 micron cartridges on top of the three on the original RO system.
I think if we were to bypass the RO filter and straight to the DI filter at a slower rate, it would work. I'll test it out later this week.

[christyf5]

I seem to be able to grow algae using RODI water with a TDS of zero. Quite frankly I'm scared to only go with DI water, although I've contemplated it several times.

[zulu_principle]

Chin sent me a PM so I thought I would just post my reply here.

I have been only using DI for about 5 years now. That being said I am metered for my water consumption, and my recollection is that it is somewhere near 4 times that of the residential rate.

My system runs a 5 micron prefilter, then 10 micron carbon then triple DI, we aim for TDS of 4 or below and then start changing the filters.

We have had issues but I cant claim they were from using DI only resin.

As for using the chemicals to recharge, not sure with the toxic nature of the chemicals, the water savings, and a value for our time that it is more "economical" to just use a few more DI Cartridges.




Wendell

[SusanB]

What kind of system uses 150 gallons to yield 50 gallons? Our reject at work was only about 10% (but that's for Vancouver water). Still, a reject of 66% is way out of wack. People initially went to RO because it was cheaper and the membranes lasted longer, but it does depend on your feed water, prefiltration etc, as well as what you're trying to remove from your water.

[skylord]

Im using the Kent Marine Maxxima Hi-S RO/DI Filter - 60 GPD and my rejection is very close to what Chin's is. While Im not on a metered water system I dont have a garden for the reject water and it seems like such a waste to put that much down the drain. When our new house is completed (Aug) I will most likely use Chins suggestion and use the reject water in the yard/garden.

Scott

[fkshiu]

Originally Posted by zulu_principle

Chin sent me a PM so I thought I would just post my reply here.

I have been only using DI for about 5 years now. That being said I am metered for my water consumption, and my recollection is that it is somewhere near 4 times that of the residential rate.

My system runs a 5 micron prefilter, then 10 micron carbon then triple DI, we aim for TDS of 4 or below and then start changing the filters.

We have had issues but I cant claim they were from using DI only resin.

As for using the chemicals to recharge, not sure with the toxic nature of the chemicals, the water savings, and a value for our time that it is more "economical" to just use a few more DI Cartridges.




Wendell

And there you have it. If a commercial operation can do it, there's no reason why a home system can't.

Of course, it was only the neat little drinking water faucet that came with my Aquasafe system that sold the wife, so I would've still ended up RO/DI in any event =)

[Chin_Lee]

Originally Posted by SusanB

What kind of system uses 150 gallons to yield 50 gallons? Our reject at work was only about 10% (but that's for Vancouver water). Still, a reject of 66% is way out of wack. People initially went to RO because it was cheaper and the membranes lasted longer, but it does depend on your feed water, prefiltration etc, as well as what you're trying to remove from your water.

SusanB
what system do you use at work that used 10% waste? if I can reduce mine to 10%, i will continue to use RO/DI. But I know my waste water ratio is not out of the norm.

[Chin_Lee]

Originally Posted by zulu_principle

Chin sent me a PM so I thought I would just post my reply here.

I have been only using DI for about 5 years now. That being said I am metered for my water consumption, and my recollection is that it is somewhere near 4 times that of the residential rate.

My system runs a 5 micron prefilter, then 10 micron carbon then triple DI, we aim for TDS of 4 or below and then start changing the filters.

We have had issues but I cant claim they were from using DI only resin.

As for using the chemicals to recharge, not sure with the toxic nature of the chemicals, the water savings, and a value for our time that it is more "economical" to just use a few more DI Cartridges.
Wendell

Wendell
why not use the 10 micron carbon and then the 5 micron prefilter? Did you find that config would clog up your carbon filter too quickly?

What type of DI filter do you use? Is it the Aquasafe refill your own resin container?

As far as the toxic nature of the chemicals, i believe there is a final process to counteract the chemicals.

As far as economical sense, would it not be easier to collect all your used DI resin for a few changes in a container and then recharge them all at the same time using the procedure?

[Veng68]

Hey Chin,

If your seriously going to recharge DI resins......... for a bulk supply of pure lye....... try Cranberrylane make it yourself body care store in Coquitlam

http://cranberrylane.stores.yahoo.ne...droxide--.html

Cheers,
Vic[veng68]