respiration vs fermentation for co2 generators

now before i get into my question i’m just gonna clear this up, diy co2 generators are by no means a replacement for a proper co2 system with ppm control and i’m only looking to give my tent a little co2 boost which is better than nothing.

After having said that my question is about the biology of yeast. i have a large glass bottle with holes drilled on top, an aquarium pump and two airstones. i filled the bottle with about 2-3 litres of water, a pinch of yeast and a cup of sugar with airstones running.

so here is the question: do we have any biologists or biology fans around to englighten me on one thing, which produces more co2 respiration or fermentation?

crimsonecho said:

now before i get into my question i’m just gonna clear this up, diy co2 generators are by no means a replacement for a proper co2 system with ppm control and i’m only looking to give my tent a little co2 boost which is better than nothing.

After having said that my question is about the biology of yeast. i have a large glass bottle with holes drilled on top, an aquarium pump and two airstones. i filled the bottle with about 2-3 litres of water, a pinch of yeast and a cup of sugar with airstones running.

so here is the question: do we have any biologists or biology fans around to englighten me on one thing, which produces more co2 respiration or fermentation?

Click to expand...

I’m going to have a search around for you because I’m sure someone did a 5L mix of yeast for a test and used a Co2 monitor to work out the ppm and how long it held for.

give me 5 mins.

Start here.

I went to the search function and typed the following

Co2, yeast, sugar, ppm, test

Including all the commas and space after the comma.

thanks for the quick research man but even in that thread you quoted the results are inconclusive because individual setups differ and ppm meters are not always that accurate etc etc. thats why i’m looking for a theoratical explanation on this. as ethanol is a by product of fermentation and it contains carbon and oxygen atoms i wonder if some of those atoms create co2 in respiration?

since no ones biting i’m giving this a bump and adding one more question for any biology enthusiasts amongst us:
-how would adding a surfactant to keep the foam at minimum would affect the functioning of the yeast or co2 production?

i have silicone based surfactant which keeps the foam down but i only add a drop of it to 2-3l of water. thats way below the recommend dosage for foliar or any other application and i replenish that dose every 6-7 hours because after a while it starts to foam again.
these are the question i searched to answer for sometime now, i even researched some academic papers etc but couldn’t find satisfying answers if any. that’s why any help would be appreciated.
so, anyone?

jondamon said:

Home made CO2 test results

I just got a meter on ebay for 115 bucks new. I have a 72 cubic foot cabinet grow. I have one bottle that is 1.5 gallons. there is 5 tablesppons of yeast and 5 cups of sugar currently putting out 1000 ppm. about 500 outside the cabinet

rollitup.org

Start here.

I went to the search function and typed the following

Co2, yeast, sugar, ppm, test

Including all the commas and space after the comma.

Click to expand...