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Boozer Tolerant Yeast..

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Boozer Tolerant Yeast..

Postby sugarcreek » Fri Oct 03, 2014 5:40 am

Oddly enough this popped up on my tech news feed:

http://arstechnica.com/science/2014/10/ ... -biofuels/
What is it about a beautiful sunny afternoon, with the birds singing and the wind rustling through the leaves, that makes you want to get drunk? ~Jack Handey
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Re: Boozer Tolerant Yeast..

Postby Mud » Fri Oct 03, 2014 6:53 am

People are still interested in ethanol for fuel?
Specialization is for Kiwi.
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Re: Boozer Tolerant Yeast..

Postby Kapea » Fri Oct 03, 2014 8:53 am

I've been using lab grade potassium hydroxide (calcium hardness test reagent) to control the pH of my sugar and honey ferments for years. I have noticed healthier ferments in higher alcohol ranges. My mentioning of this to others has been received with skepticism. "That yeast strain won't do that."

Well, OK. But, I've also noticed that this effect is unaffected by approval from others, or lack there of.

It's nice to see someone else has noticed it too.
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Re: Boozer Tolerant Yeast..

Postby dad300 » Fri Oct 03, 2014 4:49 pm

I like that Kapea...every once in a while someone says, "You can't do that! It can't possibly work!"

And I refrain from saying, "GEE, I did it last Saturday and it worked perfect!"
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Re: Boozer Tolerant Yeast..

Postby zedzedtop » Sat Oct 04, 2014 12:53 am

Only ever used K carbonate so I don't have much to compare to, neutral-wise. I can fathom that you'd be adding much less K if in the form of KOH. I use it for pH control.
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Re: Boozer Tolerant Yeast..

Postby Kapea » Sat Oct 04, 2014 1:16 am

A little dab'll do ya. I generally use 1-2mL of 8N KOH in 25L of wash/must.
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Re: Boozer Tolerant Yeast..

Postby Kapea » Sat Oct 04, 2014 1:21 am

Just in case you were wondering...

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Re: Boozer Tolerant Yeast..

Postby ZeroGee » Sat Oct 04, 2014 12:35 pm

Just two questions: 1) What's the percentage increase in ABV, and 2) what's the difference in ester production?

It's great to raise ABV for fuel (more production), but does it add ugly fore-shots and heads or affect overall flavor for beverage alcohol?

Finally, do you honestly think that Lallemand or Red Star isn't already aware of this? :?
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