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Netphilosopher
Senior Member


Joined: 14 Jan 2011
Posts: 1,602
Location: USA
Expertise: Just starting

Posted Wed Apr 10, 2013, 10:51am
Subject: .
 

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Netphilosopher: small_x_dark.gif
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CheapBastid
Senior Member


Joined: 3 Dec 2012
Posts: 73
Location: Los Angeles
Expertise: I like coffee

Espresso: None
Grinder: Infinity - talking myself...
Vac Pot: None
Drip: Mr Coffee
Roaster: None
Posted Wed Apr 10, 2013, 11:47am
Subject: Re: Mod for AeroPress - use as Forced Percolation Column Brewer
 

Netphilosopher Said:

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.

Posted April 10, 2013 link

Thanks for this!

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.

=)
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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 719
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Wed Apr 10, 2013, 12:29pm
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.
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Netphilosopher
Senior Member


Joined: 14 Jan 2011
Posts: 1,602
Location: USA
Expertise: Just starting

Posted Fri Apr 12, 2013, 5:28pm
Subject: .
 

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rasqual
Senior Member
rasqual
Joined: 29 Jun 2005
Posts: 1,076
Location: Chicago area
Expertise: I love coffee

Espresso: *$ Barista, non-pressurized
Grinder: SMP
Vac Pot: Yama, Aeropress
Drip: Porcelain Melitta 103, Hario
Roaster: "ring roaster", mod popper
Posted Sat Apr 13, 2013, 5:00pm
Subject: Re: Mod for AeroPress - use as Forced Percolation Column Brewer
 

Netphilosopher Said:

Here's a quick illustration ...

Posted April 10, 2013 link

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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