1899Re: [Distillers] yeast propagation
- Mar 5, 2001
----- Original Message -----
From: "Jack Ricks" <secondhandjack@...>
Sent: Monday, March 05, 2001 11:43 AM
Subject: [Distillers] yeast propagation
> G'day there
> It appears to me that spending about$10 for yeast for
> every 25litre batch of wash seems to be a waste of money.
That's coz it is!
> I'm using turbo yeast(with the nutrient included in it).
> Why is it not possible to use only a small portion of this packet of
> yeast,say20%for every 25l wash.Is it not possible to grow that 20% in
> a container until its at the same volumn(parts per million of yeast)
> as you would get from using the whole packet of turbo yeast in the
> first place?
> Surely this is possible to do?
> Has anyone tried to do this with turbo yeast,or any type of yeast for
> home brewing?
Absolutely! Brewers do this all the time. When brewing beer it is critical
to pitch the right volume of yeast to ensure a good fast healthy
fermentation. This is not so critical when brewing a wash but you are right
on the money about re-using the yeast.
Save a small amount, say, 500mL of yeasty wash from your batch in a Coke
bottle that you have sanitised with bleach, then store in your fridge. Just
remember not to mistake it for lemon squash when you come home from a night
out :-) It will keep for a couple of months like this.
A few days before preparing your next wash, boil up some malt extract or
sugar and nutrient in a litre of water.
Wait for it to cool and add this to a sanitised 2 litre PET bottle along
with your yeast culture. Put a stopper with an airlock - or
failing that, cling wrap with a rubber band over the bottle mouth (punch a
small hole with a pin to let the carbon dioxide out.).
Let this mini-wash ferment away, you can swish and shake the bottle as many
times as you like - it will increase the cell count.
When it is fermenting away nicely for a couple of days then add the whole
bottle or healthy yeast into your freshly made 20 or 25L of wash!
> I know you would have to add more nutrient to the mix when you put
> the yeast in the wash.
Yep - same amount as usual. You can just buy nutrient from now on.
Eventually the yeast will get infected - there are always contaminants
getting in somewhere along the way, we are not in a airtight lab! You will
notice unusual smells in the ferment after reusing the yeast quite a few
times. In brewing it is very noticable but distillers can get away with a
lot more infection without noticing off flavours in your output.
You will get away with buying a new pack every year or longer depending on
how miserly you are!
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