CO2 degasser

Reef-junky · Jan 10, 2022

So I made a degasser. If I make the degasser air tight is that going to interfere
With the CO2 escaping and saturate the water with it?

Midrats · Jan 10, 2022

I'm interested in this. I burn through DI and need to do something.

Reef-junky · Jan 10, 2022

Wondering if the gas won’t be able to escape

Randy Holmes-Farley · Jan 10, 2022

Reef-junky said:
So I made a degasser. If I make the degasser air tight is that going to interfere
With the CO2 escaping and saturate the water with it?

A little more info...

What are you degassing?

Can you explain how it is intended to work?

Obviously, the gas must escape from whatever fluid you are degassing.

Reef-junky · Jan 10, 2022

Randy Holmes-Farley said:
A little more info...

What are you degassing?

Can you explain how it is intended to work?

Obviously, the gas must escape from whatever fluid you are degassing.

It’s to degass CO2 from well water

Reef-junky · Jan 10, 2022

I tried to gravity feed the DI but it’s not fast enough. Tried to lower the DI as well but it still isn’t fast enough.

Randy Holmes-Farley · Jan 10, 2022

You will need to have fresh air around the water to allow CO2 to escape the water.

Reef-junky · Jan 10, 2022

Randy Holmes-Farley said:
You will need to have fresh air around the water to allow CO2 to escape the water.

Sorry
I am running an air pump with air stone

Dennis Cartier · Jan 10, 2022

I built something similar, though for stripping CO2 at a different point in the process, CalRx Aeration Tower / CO2 Removal from Effluent Project

The issue you are going to have or are having, is that you need pressure to push the stripped water through the DI media, but you need to vent the air containing (hopefully) elevated CO2. So simply putting a vent in the top of the tower will likely overflow as gravity will not push the water through the DI.

I can think of a not too hard way of accomplishing this though. I used some industrial pressure sensors in a couple of my DIY projects, Pressure sensor with display PN7204, and they would work perfect for releasing the accumulated air from the top of the tower at a preset pressure and toggling between a vent valve and DI valve. As this is fresh water, the valves can be the easily available RODI style (for 24VDC).

This thread for one of my projects will help you to see how they are used. CO2 Tank Auto Switcher

I would be happy to help you work out the details of setting something like this up for your stripper.

Dennis

Reef-junky · Jan 10, 2022

Dennis Cartier said:
I built something similar, though for stripping CO2 at a different point in the process, CalRx Aeration Tower / CO2 Removal from Effluent Project

The issue you are going to have or are having, is that you need pressure to push the stripped water through the DI media, but you need to vent the air containing (hopefully) elevated CO2. So simply putting a vent in the top of the tower will likely overflow as gravity will not push the water through the DI.

I can think of a not too hard way of accomplishing this though. I used some industrial pressure sensors in a couple of my DIY projects, Pressure sensor with display PN7204, and they would work perfect for releasing the accumulated air from the top of the tower at a preset pressure and toggling between a vent valve and DI valve. As this is fresh water, the valves can be the easily available RODI style (for 24VDC).

This thread for one of my projects will help you to see how they are used. CO2 Tank Auto Switcher

I would be happy to help you work out the details of setting something like this up for your stripper.

Dennis

That would be greatly appreciated!

Reef-junky · Jan 10, 2022

Could this be done with a simple pressure relief valve?

Dennis Cartier · Jan 10, 2022

Reef-junky said:
Could this be done with a simple pressure relief valve?

Maybe, if you put a restriction on the effluent line so that it flowed, but not enough to keep ahead of the air pump. When a preset pressure is reached, the valve opens and vents the accumulated air and the process starts over again. That is kind of what I was envisioning with the IFM sensor.

Dennis

Reef-junky · Jan 10, 2022

Actually another idea if a valve was put at the top I wonder if you could restrict it enough to have enough pressure to push the water through but yet allow some to escape.

Dennis Cartier · Jan 10, 2022

Reef-junky said:
Actually another idea if a valve was put at the top I wonder if you could restrict it enough to have enough pressure to push the water through but yet allow some to escape.

Ya that is worth a try as well. I would suggest tapping a 1/4" NPT hole at the top so you can screw in an RODI fitting and use that for a needle valve and or future other tests. If you don't have the taps for that, then a 1/4" bulkhead will work as well.

Dennis