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Theoretical question for DIY yeast
"dGH" wrote in
: If one were to connect an air pump and air stone INTO the 2L pop bottle so that the yeast mixture was constantly bubbling: The net effect would be that your output from the bottle would be CO2 enriched air which continuously bubbled into the aquariium (or reactor). BUT, the yeast reaction would never turn anaerobic, which means the product would simply be CO2 and water. The yeast would never die, and the kit would never have to be restarted or replaced. Theoretically you could just add another cup of sugar each week to keep up the CO2 production. The problem is not that the water and sugar turns anaerobic, but rather that it turns alcoholic. As the proof goes up, the yeast starts dying off. On top of that, adding air bubbles would no doubt cause surface turbulence, which would hurt your CO2 levels as well. ~Empty -- 'You're not friends. You'll never be friends. You'll be in love till it kills you both. You'll fight, and you'll shag, and you'll hate each other till it makes you quiver, but you'll never be friends. Love isn't brains, children, it's blood... blood screaming inside you to work its will. I may be love's bitch, but at least I'm man enough to admit it.' Spike |
#2
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Theoretical question for DIY yeast
In article , Empty
writes: The problem is not that the water and sugar turns anaerobic, but rather that it turns alcoholic. As the proof goes up, the yeast starts dying off. On top of that, adding air bubbles would no doubt cause surface turbulence, which would hurt your CO2 levels as well. I don't think adding air bubbles would decrease CO2 output; I've wanted to try this very experiment to see how CO2 output would be affected but just never gotten around to setting it up. Since yeast cultures grown up in a lab are done so with constant agitation, I can only imagine that bubbling air into the solution would only enhance growth. Alcohol production, however, is a problem, and I'm guessing that if you enhance growth too much you might get increased CO2 output but would deplete the yeast nutrients quicker. If you wanted to prolong your culture you could just decant the nutrient-depleted supernatant after CO2 generation drops and add a new sugar water solution -- the yeast tends to sediment into an inactive pellet. Erica http://members.aol.com/_ht_a/mitoem/mitoem/index.htm |
#3
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Theoretical question for DIY yeast
"E. Mito" wrote in article , Empty writes: The problem is not that the water and sugar turns anaerobic, but rather that it turns alcoholic. As the proof goes up, the yeast starts dying off. On top of that, adding air bubbles would no doubt cause surface turbulence, which would hurt your CO2 levels as well. I don't think adding air bubbles would decrease CO2 output; I've wanted to try this very experiment to see how CO2 output would be affected but just never gotten around to setting it up. Since yeast cultures grown up in a lab are done so with constant agitation, I can only imagine that bubbling air into the solution would only enhance growth. Alcohol production, however, is a problem, and I'm guessing that if you enhance growth too much you might get increased CO2 output but would deplete the yeast nutrients quicker. If you wanted to prolong your culture you could just decant the nutrient-depleted supernatant after CO2 generation drops and add a new sugar water solution -- the yeast tends to sediment into an inactive pellet. Erica http://members.aol.com/_ht_a/mitoem/mitoem/index.htm Thanks for the feedback. Perhaps I'm interpreting something incorectly, but from what I've read on the net, alcohol isn't produced when the yeast are aerobic. |
#4
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Theoretical question for DIY yeast
Thanks for the feedback. Perhaps I'm interpreting something incorectly, but from what I've read on the net, alcohol isn't produced when the yeast are aerobic. I'm not certain about this but I think injecting air into the culture increases the amount of yeast thus also increasing CO2 production and shortening the available nutrients in a quicker amount of time, not to mention wild Ph fluctuations. |
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