I think there is a fatal problem here apart from cost and complexity. A fatal problem that makes this device potentially DEADLY. Sorry for shouting.
Consider air. Add humans. Humans convert O2 and water and food into CO2 and H2O. Your machine takes out the CO2.
What happens is that the O2 levels will inexorably fall, until you basically have pure-ish Nitrogen. If a human or other mammal breathes pure Nitrogen they will not feel suffocation. Suffocation detection is triggered by CO2 levels which your device removes. What happens is that you would feel OK and then suddenly faint and subsequently die.
Here is a link to a euthanasia device that implements this mechanism as a way to euthanize yourself.
I think there is a fatal problem here apart from cost and complexity. A fatal problem that makes this device potentially DEADLY. Sorry for shouting.
Consider air. Add humans. Humans convert O2 and water and food into CO2 and H2O. Your machine takes out the CO2.
What happens is that the O2 levels will inexorably fall, until you basically have pure-ish Nitrogen. If a human or other mammal breathes pure Nitrogen they will not feel suffocation. Suffocation detection is triggered by CO2 levels which your device removes. What happens is that you would feel OK and then suddenly faint and subsequently die.
Here is a link to a euthanasia device that implements this mechanism as a way to euthanize yourself.
https://twitter.com/peacefulpill/status/1247891102310391809?lang=en
Person in a room: − 35 g of O2/hr from room
Person in a room with a CO2 stripper: −35 g of O2/hr from room
How does the presence of a CO2 stripper do anything at all to the oxygen amount in the air?