I have an early Manual GF and I'm considering using it for some small higher gravity batches, small enough that I could brew full volume/no sparge.
The GF's efficiency is low with that sort of batch simply because there isn't enough sparge water to effectively flush the grain.
The plan would be to use a voil over the bottom plate or my very old abused Biab bag rather than the GF tube/plate overflow setup.
Working it out in the GF.
Dead Volume.........................3 litre
Grain Absorption ..................5 litre (assuming a grain bill of 5kg)
Boil Off..................................3 litre (90mins)
Vol into FV.............................12 litre
Total......................................23 litre water require (approximate)
If I allow for the water displaced by the wet grain it would be around 26 litre of space taken up in the GF which would be quite manageable.
Assuming that I use finer ground grain and get the pH/water treatment right what sort of efficiency might I reasonably expect?
Atb. Aamcle
The GF's efficiency is low with that sort of batch simply because there isn't enough sparge water to effectively flush the grain.
The plan would be to use a voil over the bottom plate or my very old abused Biab bag rather than the GF tube/plate overflow setup.
Working it out in the GF.
Dead Volume.........................3 litre
Grain Absorption ..................5 litre (assuming a grain bill of 5kg)
Boil Off..................................3 litre (90mins)
Vol into FV.............................12 litre
Total......................................23 litre water require (approximate)
If I allow for the water displaced by the wet grain it would be around 26 litre of space taken up in the GF which would be quite manageable.
Assuming that I use finer ground grain and get the pH/water treatment right what sort of efficiency might I reasonably expect?
Atb. Aamcle
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