Where does yeast come from?
Where does yeast come from?
I presume its a "useful" mould like penicillin,but is that all their is to our good friend.
- Aleman
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Basically its a single celled fungus. Prevalent everywhere, but abundant on fruit. Brewing yeast (Saccharomyces cerevisiae sp??) has been selected over a long period of time for its resistance to alcohol etc, but was originally derived from 'bread' yeasts.
IIRC a lot of work was done in the 19th century at the Carlsberg institute in Denmark, but that may have been on yeast taxonomy (identification). Most brewing is done with single strains (some breweries like Ringwood, use multiple strains), but some still use the local yeast population in the air around the brewery Belgian trappist beers come to mind.
IIRC a lot of work was done in the 19th century at the Carlsberg institute in Denmark, but that may have been on yeast taxonomy (identification). Most brewing is done with single strains (some breweries like Ringwood, use multiple strains), but some still use the local yeast population in the air around the brewery Belgian trappist beers come to mind.
Mars
EDIT- I seem to recall an article in New Scientist that covered the Yeast Plants used for making Ginger Beer- the really traditional stuff.
The Yeast and a particular strain of bacteria co-existed in most of these plants, and were mutually beneficial- each using the other's waste products, IIRC.
EDIT- I seem to recall an article in New Scientist that covered the Yeast Plants used for making Ginger Beer- the really traditional stuff.
The Yeast and a particular strain of bacteria co-existed in most of these plants, and were mutually beneficial- each using the other's waste products, IIRC.
Not sure any of the Belgian Trappist use the spontaneous fermentation method although Orval does deliberately add Brett at bottling. I think you're thinking more of the Lambic brewers.Aleman wrote:but some still use the local yeast population in the air around the brewery Belgian trappist beers come to mind.
- Aleman
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Sorry Steve, They all taste the same to mesteve_flack wrote:Not sure any of the Belgian Trappist use the spontaneous fermentation method although Orval does deliberately add Brett at bottling. I think you're thinking more of the Lambic brewers.Aleman wrote:but some still use the local yeast population in the air around the brewery Belgian trappist beers come to mind.

