C02 removal from well water

[cedwards04]

Lets discuss degassing well water. I am currently using a degas tower and am looking for a better option.

My problem is that i am not getting enough flow through the di resins (brs pro series) to keep up with ro production. I have a 150gpd system that is actually producing around 160gpd, however, im only able to gravity feed around 16gpd from the degas tower through the resin. I need a way to pressurize this.

Can anyone tell me how quickly the degas proccess actually happens? I think my only option is going to be replacing the degas tower with another water storage container, degassing the water in that container, and then pumping that water through the di resin. Is it possible to set this up in a way that doesn't require waiting several hours before the water is ready to pump through the resin?

 

[Scurvy]

Beyond my knowledge but it sounds like you have the same issue as @TheHarold

Maybe you guys can come up with something together.

 

[TheHarold]

Beyond my knowledge but it sounds like you have the same issue as @TheHarold

Maybe you guys can come up with something together.

My first plan of action is to get the spectrapure 99% rejection membrane going. With their standard membrane, my 500 tds well water goes to ~16 tds. If their premium membrane is really 99%+ rejection, it would take me to 5tds or under, which perhaps could solve the issue!

 

[Dr. Dendrostein]

My first plan of action is to get the spectrapure 99% rejection membrane going. With their standard membrane, my 500 tds well water goes to ~16 tds. If their premium membrane is really 99%+ rejection, it would take me to 5tds or under, which perhaps could solve the issue!

Just wondering, is water going thru softner first. I ask, because if yes, then ro membrane works efficently. If no then membrane losses effiency very soon. Just a thought

 

[TheHarold]

Just wondering, is water going thru softner first. I ask, because if yes, then ro membrane works efficently. If no then membrane losses effiency very soon. Just a thought

Yep, water is softened first. I am just hoping that 99% rejection will make my DI use more reasonable.

 

[Dr. Dendrostein]

Yep, water is softened first. I am just hoping that 99% rejection will make my DI use more reasonable.

Im going to use some well water in the next 2 month apprx. Following along

 

[cedwards04]

Ro membrane will not do anything for co2.

 

[Dr. Dendrostein]

Ro membrane will not do anything for co2.

After running thru ro, aerate with outside air. If still low(ph). I use soda ash. Ph+alk, will increase after ph stable with soda ash, aerate again 24hrs. Check ph. If ok. Then run thru DI resin, See if that works

 

[cromag27 Verified Sponsor]

good info here.

https://spectrapure.com/frequently-asked-questions#calcc02

 

[cedwards04]

So far i am only getting suggestions of what i have already posted that i tried.

 

[saltyfilmfolks]

Let the water sit in a holding tank.before the filter.
Outside air with an air stone will increase the speed.


http://www.3reef.com/threads/advice-co2-off-the-chart-on-my-well-water-to-rodi.158459/#ath

IMO , always use azdesertrat as a key word when searching water questions.

 

[Dr. Dendrostein]

Just so you know some chemicals take 2 weeks to degas like chlorimine.

 

[tpack17]

I am on a well and also have C02 issues. After trying many combos of di with less then stellar results I decided to degas. I like you considered the tower. I was concerned with pumping thru di with gravity. So I picked up a garbage can from menards. Tried pumping thru di with a cobalt 1200. No good, took days. I then raised can up. Installed bulkhead on bottom. Wooden air stones on bottom. I ran pvc from BH to jebao 6000 pump. From pump up to 2 tees with 2 lines going thru 2 sets of cartridges. 1 cation/1 anion.
I start bubbling right when r/o covers air stones. I have a 75gpd. I usually start r/o in evening. By next day after work I start running thru di. Takes about 4-6 hrs to run thru di. You can’t go super fast. I used to get 200g tops thru one anion cartridge. I have fan 350 thru 2 and see no color change at all. Hope this helps

 

[cedwards04]

I am on a well and also have C02 issues. After trying many combos of di with less then stellar results I decided to degas. I like you considered the tower. I was concerned with pumping thru di with gravity. So I picked up a garbage can from menards. Tried pumping thru di with a cobalt 1200. No good, took days. I then raised can up. Installed bulkhead on bottom. Wooden air stones on bottom. I ran pvc from BH to jebao 6000 pump. From pump up to 2 tees with 2 lines going thru 2 sets of cartridges. 1 cation/1 anion.
I start bubbling right when r/o covers air stones. I have a 75gpd. I usually start r/o in evening. By next day after work I start running thru di. Takes about 4-6 hrs to run thru di. You can’t go super fast. I used to get 200g tops thru one anion cartridge. I have fan 350 thru 2 and see no color change at all. Hope this helps

Pretty much what i figured i was going to have to do. The degas tower works great with just 1 mixed bed di canister, but once i added the cantion/anion resins, it was all downhill from there haha.

My current water station uses 2 35g horizontal containers, one for freshwater and one for salt. I think i will add a third and use the 3rd one for degassing, then pump from that one through the di resins and into the freshwater holding tank. I feel confident this will work, but was hoping to avoid needing to add yet another container.

I wonder if using a powerhead inside the container to turn the water over faster than an airstone would help degas faster?

 

[tpack17]

Pretty much what i figured i was going to have to do. The degas tower works great with just 1 mixed bed di canister, but once i added the cantion/anion resins, it was all downhill from there haha.

My current water station uses 2 35g horizontal containers, one for freshwater and one for salt. I think i will add a third and use the 3rd one for degassing, then pump from that one through the di resins and into the freshwater holding tank. I feel confident this will work, but was hoping to avoid needing to add yet another container.

I wonder if using a powerhead inside the container to turn the water over faster than an airstone would help degas faster?

I don't think so.I have 2 wooden airstones ziptied to a ceramic square to hold them down. They produce alot of bubbles for air exchange. The key IMO is to have two sets of cartridges. that way i can pump double the amount. I have 2-55g containers and the Gcan. Same setup you described. I'll tell you it is a delight to not change resin every two weeks!

 

[topjimmy]

I'm on a well with a softener and chlorination system. My tds @ the faucet is 1600±. I was burning through di resin after the ro and thought it was a co2 issue so I just made ro water into a 32 gallon brute, and then aeration for a day before the di. Seemed to make little difference. Then I added a a booster pump to the ro membrane and got the tds down to 15 and run the effluent right to the dual di. I get hundreds of gallons now @0 tds. I might get more by degassing but pumping the water through the di was a giant pita.

 

[cedwards04]

What water pressure did you have before adding the booster pump? I was messing around yesterday and discovered my pressure is a good bit lower at the ro/di unit than at my well. I didnt realize how much pressure i would lose. Im on at 50 off at 70 on the pump, but only getting 35-55 at the ro/di.

My incoming tds without a softener is only 26. So my water is pretty darn good for well water. I get 5tds after the membrane.

 

[tpack17]

Yeah you need the booster on the well. I have 85-90 psi through filters and r/o. That’s how I go from 600 to 4-5 after r/o. Thing is though if you have C02, it won’t matter what your tds is after r/o.

 

[topjimmy]

What water pressure did you have before adding the booster pump? I was messing around yesterday and discovered my pressure is a good bit lower at the ro/di unit than at my well. I didnt realize how much pressure i would lose. Im on at 50 off at 70 on the pump, but only getting 35-55 at the ro/di.

My incoming tds without a softener is only 26. So my water is pretty darn good for well water. I get 5tds after the membrane.

Not sure what the pressure @ the membrane was but with a well the pressure isn't ever consistent if you're using a bladder to provide it. If you have a manifold it can be better.

The booster pump takes it to 90 psi @ the membrane, best investment I ever made for the ro unit. Co2 could be an issue still but it is certainly better effluent now.

 

[VbReefer]

I've got a 275g IBC tote elevated 4ft with an airstone. Drilled a bulkhead about 4" off the bottom so I never get the sediment and can flush through the main valve. I run a whole home filter at the well(10 micron) another before the IBC tote(5 micron) then a spindown debris filter before the delivery pump and a whole home filter with 5 micron element before the booster pump.
Was gravity feeding a aquatec 8800 booster pump with good results but bare minimum pressure IMO 40psi @the membrane.
Highly recommend adding multiple pressure gauges.
Anyways I added a seaflo delivery pump before the booster pump. Also had to add a 2g pressure tank to stop the delivery pump from short cycling.
This got me to 90 after the booster pump and 60 into the membranes.
Really clean well water besides a little iron and the Co2.
80 tap
1-3 post RO
0 post DI

Before I offgassed I could only get 100-150g out of 2 DI chambers.
That has easily doubled.