Some fodder - The first runnings of fly or batch sparging produce the highest quality wort - Brew In A Bag is ALL first runnings! From a 2010 presentation to NHC - by Kai Troester - braukaiser - Brew Free or Die Sparging and wort quality ● first wort is highest quality wort ● sparging depletes the mashs buffer capacity -> water pH starts to take over -> pH rises -> tannins become more soluble ● Be careful with high lauter efficiencies (90-95+%). They may reduce wort quality. ● Dont fix poor conversion efficiency with excessive lautering ● 75% efficiency for one brewer may not be the same 75% for another brewer: ● 95% conversion eff. x 79% lauter eff. = 75% into kettle ● 79% conversion eff. x 95% lauter eff. = also 75% into kettle ● former is a realistic no-sparge scenario while the latter could be over sparging reducing lauter efficiency ● limit the amount of sparge water by using more strike water -> thinner mashes ● German Pilsners have been brewed with thin mashes in order to increase the amount of high quality first wort ● no-sparge. With close to 100% conversion, efficiencies can be in the 70s for average beers ● keep boil-off between 10 and 15% -> limits the amount of sparge water available ● batch spargers may not fully drain the mash before sparge water addition
Posted on: Sat, 20 Dec 2014 19:00:18 +0000
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