CO₂ Production with Bread Yeast

This is the basic setup to produce CO₂ by fermentation. What is most important is to keep the airspace above the mix sealed. The yeast will start fermenting the sugar into alcohol and CO₂ after the oxygen in the headspace used up. I have a single hole #7 stopper in the container connected to a  plastic tube that runs into a container of RD-20 or Physan. I've been using fishtank air stones to create fine CO₂ bubbles that rise through the disinfectant. This will produce about 350 to 500 ml of CO₂ per hour. Put a small filled glass upside down and trap bubbles for several minutes to estimate production rate of CO₂

The mixture in the container is:

Warm Water 80⁰ - 90⁰ farenheight...

1# of granulated sugar- that's about 500ml

1 teaspoon of regular bread yeast- Fleishman's or Red Star