### Author Topic: Batch Sparge Grain Bill Increase  (Read 2114 times)

#### a10t2

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##### Re: Batch Sparge Grain Bill Increase
« Reply #15 on: November 15, 2014, 05:48:21 PM »
What's your secret to 80+% efficiency. I usually get 70-ish%.

The lauter efficiency for almost any batch sparge will be over 70%. If you get full conversion efficiency, then mash efficiency should only be under 70% for very big beers. So either you have a lot of dead space, or your conversion efficiency is low. That could be due to any one, or more, of the mash parameters (temperature, pH, crush, thickness, time) being out of its optimal range. Once you optimize all those parameters, efficiency should be very predictable.

My mash lauter is usually lower than expected and my sparge lauter is usually higher than expected.

This is a dead giveaway that conversion isn't complete at the end of the mash rest. Rest longer and see what happens, or try a psuedo-mashout at ~160°F before lautering to try to accelerate conversion.
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#### dmtaylor

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##### Re: Batch Sparge Grain Bill Increase
« Reply #16 on: November 15, 2014, 10:52:09 PM »

And try to get your first & second runnings to have equal volumes.  For example if your pre-boil volume is 7 gallons, then strive to get 3.5 gallons out of the mash and 3.5 gallons out of the sparge.  Science has proven that this will always maximize batch sparge efficiency.  Denny says it doesn't matter too much, but hey, my average efficiency is a point higher than his, so who you gonna believe?

which only proves my point!

True... true.
Dave

The world will become a much more pleasant place to live when each and every one of us realizes that we are all idiots.