What is Yeast?
Yeast is a single cell organism which multiplies vigorously in the presence of oxygen and then after consuming all the oxygen will convert fermentable sugars into alcohol. Without yeast we could not produce alcoholic beverages or ethanol fuel.
Alcohol Active Dry Yeast/Distillers Yeast
Alcohol Active Dry Yeast,Distillers yeast is a particular species of yeast (Saccharomyces cerevisiae) that has a particularly strong ability to metabolize sugar and produce alcohol as a by-product. Distillers yeast also has a major impact on the flavor of your final spirit. The flavor and aroma of whiskey, rum and moonshine (or lack of such in the case of vodka) are highly influenced by the distillers yeast in the fermentation process and thus choosing the proper yeast has a significant impact of the quality of your distilled spirit. All distillers yeast is definitely not the same.
Distillers Yeast Strains
Within the species of Saccharomyces cerevisiae there are many different strains that will have significantly different performance characteristics and produce diverse flavor congeners. Think of it in the context of humans. We are all a part of the same species (Homo sapiens) but we have great diversity in our species. Each of us is different in many ways. Likewise each strain of distilling yeast is different. For example the distillers yeast strain used in Alcotec 48 products has the capability of fermenting up to a very high alcohol percentage (20+%) while producing very low volatiles. In contrast ordinary bread yeast strains of Saccharomyces cerevisiae have the ability to produce maximum CO2 in order to cause dough to rise, but they typically die off at far lower levels of alcohol while producing high levels of volatiles (bad flavor congeners and other chemical compounds). The manufacturer of Alcotec also uses strains that produce specific flavor profiles for their whiskey, rum and fruit turbo varieties. The generic bulk packs of distillers yeast that some retailers sell could actually be any one of a variety of strains but usually is of the type used for making ethanol fuel (a strain with high alcohol tolerance but with little regard for taste). All yeast should be used promptly once the package is opened as exposure to air will kill the yeast cells within a few weeks of exposure.
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