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MASH RECIPE FOR CORN OR OTHER STARCH GRAIN
- Weigh your grain and make record of dry weight.
- The ratio of each enzyme to weight of grain is 2 pounds per dry ton of grain.
- The ideal amount of water for conversion: Enough to keep the grain under a few inches of water.
- Before heating the grain/water mixture you need to test and adjust the pH of the mixture.
- The enzymes become inactive below a pH of 4.5 or above 7.0 so adjusting the pH to between 5.5 and 6.0 will provide the
ideal conditions.
- If the initial reading is too low you can add calcium carbonate or bicarbonate of soda.
- If your pH is to high you can adjust with
sulfuric or citric acid.
- When your pH is in the working range you should begin cooking your grain until it begins to get soft.
- Then check the temperature and cool to
166F but not less than 132F.
- Stir in the BA-100 ( Alpha amylase; which is the white powder enzyme ) and let sit for 60 minutes, this will help
to liquefy the mash a little and make it easier to stir.
Before adding the GA-100 ( Glucoamylase; the white-brownish
enzyme) you may have to
adjust the Ph of the mixture.
- GA-100 is active between a pH of 2.8 and 5.0 so an ideal pH would be about
4.0.
- GA-100 is destroyed by temperatures above 167F but the optimum temperature
for final conversion is between 140F and 130F but do not heat or cool the mash after adding the GA-100.
Before adding your yeast you may need to add enough water to bring the Specific
gravity down to 1.060, a little lower is ok but if it is to high your yeast will die out before it gets all the sugars used
up.
Let it cool naturally and you can add the yeast only after the temperature
has dropped below 100F.
- These enzymes only convert starch
and their related cellulose to sugar,
they do not take the place of brewers yeast, and Yeast will still have to be added after sugar conversion.
Keep unused enzymes refrigerated, Full strength life is
1 year, the enzymes will only loose 10% strength per year thereafter if kept refrigerated.
Donald
<SOURCE Donald Franson>
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