Beer concentrate - any theory on how Pat makes these??

[Ralph]

Beer concentrate - add water and carbonate. A very cool idea for the back country inclined! 

http://www.patsbcb.com/brew-concentrate

Now, does anybody have any theory on how Pat might be making a 25% alcohol concentrate that when watered down tastes something like beer?? In other articles it says they use standard ingredients and mash/kettle/fermentor...

a bit more info here 

http://www.gizmag.com/pats-pocket-sized-beer-concentrate/28590/

[Ralph]

Reading that second article properly it is more like 49% alcohol! Even more interesting!

[Richard Jack]

maybe spinning band or vacuum distillation and really careful reblending of the results?

Or a mix of that and some boiled down spec grains + ethanol + hop extract?

[Ralph]

They keep mentioning that they do not start with all the water in the process... so I think that rules out the distillation method. 

I was thinking you could brew like normal and boil it down to concentrate before fermenting... but then the yeast would never ferment it...

[Horace]

I suspect this might be the answer here

[Ralph]

Yes indeed!