DIY co2 (yeast) generator temperature ?

J

jaime.mantilla

Registered Member
Nov 15, 2006
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I prepared several times the yeast formula (2 sugar cups on a 2L soda bottle), everything is well sealed, but CO2 production goes to nothing within less than a week and never produces more than 10 bubbles per minute.

Is there a recomended temperature to run this kind of set ? I live on a cold area (57F, 14C).

Any other advices ?

TIA
 
How much yeast are you using? A larger amount of yeast will give you more CO2 produced in a shorter period of time and the mix will have to be changed more frequently. A smaller amount of yeast will give you less CO2 over a longer period of time.
 
try a mix with less sugar.. 1c sugar should do for a 2L setup, as too high of a sugar content can actually be detrimental for the yeast population.

and yes, you may be running too cold. a trick i try (which is risky because of the ease of knocking things over and getting messy) is i place my bottle on top of one of the vents in one of my light fixtures. the heat that the ballast produces during the day heats the bottle just enough to boost production, and it cools off enough during the night that it doesnt waste co2 when it isnt needed.
 
Rex Grigg said:
Try using something other than bread yeast. A good wine yeast will work much better at colder temperatures. Also bread yeast dies from alcohol poisoning before all the sugar is gone. A good wine yeast will go dormant from lack of sugar.
Click to expand...

Beat me to this.. bread yeast needs to be in a warmer temp to stay active. generally room temp will work (if that temp is near 70 F)
wine yeast or brewers yeast is a better way to go IMO.
 
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