Suppose the total gravity of 10 gals of wort is 40 GU and the total potential of all grains in the recipe is 450. What is the mash efficiency?
In mashing, you are collecting "x" number of gallons of wort that has a gravity of "1.0yy" that was produced from "z" pounds of malt. To calculate your mashextraction in terms of ppg, you need to multiply the number of gallons of wort you collected by its gravity and divide that by the amount of malt that was used.
here density= 1+0.04=1.04 Kg/m3
mashextraction in terms of ppg= (number of gallon in collection*gravity)/ammount of malt
=10*1.04/450
=0.023
2.3 %
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