For those looking for a fast ferment, a little time spent during the preparation stage pays huge dividends in shortening the time for a ferment.
Here is my routine for a fast Vodka at very low cost with no carbon filtering or added clearing compounds.
The secret is in the DAP – di-ammonium phosphate which should be available at a HBS or winemaker supply store along with the Multivitamin.

Ingredients ( for a 23l wash)
4kg Sugar
250g wheat bran
1 Multivitamin tablet
Pinch Epsom salts
½ tsp DAP
Citric acid
50g bakers yeast

I source the bran from the local Stockfood Co ( 5kg bag for $6.50) however most supermarkets will have it as baking bran or miller’s bran. This is not the All-Bran breakfast cereal but works out so much less expensive. at a few cents per wash.

In a large pot (5 litre or bigger) bring 2 to 3 litres of water to the boil (I boil it in the jug first to save time)
Add the 250g of bran, stir, bring back to the boil then simmer for 30 minutes stirring from time to time. It becomes a thin porridge
Dissolve the sugar in warm water and add to the fermenter with cool water to bring quantity up to 20 litres.
Add the crushed MV tab, Epsom salts and DAP.
Once the bran has simmered for 30 mins, add it to the fermenter.
I then adjust the pH to around 5 with the citric acid usually takes about ½ a tsp.
Rehydrate the yeast in 100ml water and add to the mix. Making sure the start temp is below 30C
Stir well ( I use a stick blender to thoroughly aerate it.)
Leave plenty of headroom as this takes off like a rocket. I use a 30l fermenter
Do NOT seal for at least 24 hours as a thick foamy cap will form within an hour. I put it under an airlock only after 36 hrs so I can monitor progress.
This produces a fast ferment ( normally dry to .990 within 3 to 4 days). The start SG is around 1060 so the yeast is not pushed hard to produce off-flavours
Rack off and allow to stand for a couple of days to clear before distilling.
I find this has a nice slightly wheaty taste and is much nicer than the tomato paste based wash and twice as fast to ferment.
Can also be oaked.
I have also tried multi generations with a drop in results. It is so low cost that I have found it not worth saving and reusing the trub, – that goes onto the compost.

Update: After stripping and then a spirit run I have had several litres of this sitting on uncharred oak dominos at 65% for 6 weeks.
Watered down a litre to test and it came through very nicely with a good flavour

I consistently get speeds of 84 to 96 hours from start to dry.

Mk II Version

As above but 200g of bran and 100g kibbled rye
This have turned out to be even better – just as fast but with a little more bite/flavour in the end result. It depends on the finish you want in your vodka.

Note: I always strip several ferments through the pot still column and add them together for a slow spirit run through the reflux column

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