phidelt844
Well-Known Member
Well I have collected all my equipment for full boil AG sans an MLT, which I am looking at piecing together this coming weekend. I've done a few PM recipes, but I have a question regarding bigger AG beers with batch sparging. From what I've read, double batch sparging offers better efficiency than a single sparge, so run by my math on a hypothetical 15lb, 5g batch...
Assuming no dead space, 15lb grain bill, 6.5g pre-boil volume, .11g per lb grain absorbtion:
15lb @ 1.25 quarts = 4.69g strike water
15lb * .11g = 1.65g loss
Total wort collected from the mash: 3.04g
6.5g goal - 3.04g mash = 3.46g remaining. So here is where I am confused. A double sparge would land me at 1.73g per sparge. This seems way low to me... would this even cover the grain bed? Is it best to do a single sparge with bigger beers like this? I have very little desire to sit around watching my pot boil for hours on end, so starting with more than 6.5g - 7g of wort is just not something I want to do unless it's absolutely necessary. What would my options be? Thanks!
Assuming no dead space, 15lb grain bill, 6.5g pre-boil volume, .11g per lb grain absorbtion:
15lb @ 1.25 quarts = 4.69g strike water
15lb * .11g = 1.65g loss
Total wort collected from the mash: 3.04g
6.5g goal - 3.04g mash = 3.46g remaining. So here is where I am confused. A double sparge would land me at 1.73g per sparge. This seems way low to me... would this even cover the grain bed? Is it best to do a single sparge with bigger beers like this? I have very little desire to sit around watching my pot boil for hours on end, so starting with more than 6.5g - 7g of wort is just not something I want to do unless it's absolutely necessary. What would my options be? Thanks!