Posted Wed Apr 10, 2013, 12:47pm Subject: Re: Mod for AeroPress - use as Forced Percolation Column Brewer
The chief difference is the infusion brew extracts the produced coffee from the grounds while the entire amount of coffee is all at the same strength (leaving same-strength coffee in the grounds), whereas percolation brewing introduces fresh brew water into the grounds, which is continually extracted. At the end of a percolation brew, the liquid in the grounds is significantly weaker than the produced coffee in the cup. Percolation is technically more efficient, because to obtain the same amount of produced coffee at the same strength (TDS%), percolation requires less coffee.
So in the case of this 'column brew' method, what are your findings in regards to the 'appropriate' amount of reduction of coffee used to obtain a similar TDS% to an infusion method?
I've been using the inverted Aeropress method and I find I use a lot of coffee to get the strength that I like. I'm putting in about 24 grams for about 4 min, and using as much of the body of the press as I can (plunger extracted as far as possible). The option of using less coffee is intriguing to this CheapBastid.
jpender Senior Member Joined: 11 Jul 2011 Posts: 699 Location: California Expertise: I like coffee
Grinder: OE LIDO Vac Pot: S/S Moka Pot Drip: Aeropress
Posted Wed Apr 10, 2013, 1:29pm Subject: Re: Mod for AeroPress - use as Forced Percolation Column Brewer
The difference is due to the dissolved solids trapped in the grounds, so it will depend on how wet the spent grounds are and how strong the coffee you are brewing is. For a normal strength brew you might save something around 10%, depending on how hard you press at the end. The savings scales linearly with strength.
Nice! Pretty much the way I'm heading with Aeropress too, lately (though I use a mesh instead of a filter). Hadn't thought to use a slice of tubing as a retainer. Brilliant Just ordered some from McMaster-Carr. Close enough to will-call on the way to work Monday. Then I get to figure out how best to cut it.
9245K53 Machinable and Bendable Clear PETG Tube 2-1/4" OD, 2" ID
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