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Old 10-13-2011, 08:03 PM   #1
Jun 2008
Tacoma, Wa
Posts: 459
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I brewed an all grain pale ale yesterday and didn't get around to cleaning up the grains in the mash tun cooler until today. Good lord is that an awful smell! Anybody know the reason why? Took my breath away. This is the second time I didn't have time to clean it up. Last time was a pumpkin ale which I attributed the smell to the pumpkin, man was in wrong.

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Old 10-13-2011, 08:05 PM   #2
IffyG's Avatar
Oct 2009
Posts: 1,393
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I'm fairly certain its the lactobacillus from the grain munching on the leftovers that is producing the hellacious stink associated with spent grains.

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Old 10-13-2011, 11:21 PM   #3
Bubba's Avatar
Oct 2009
Posts: 492
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What IffyG said....= Rotting grain

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Old 10-14-2011, 12:43 AM   #4
Sep 2010
Posts: 189
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you can make a sour beer with it!

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Old 10-14-2011, 12:57 AM   #5
Post Hoc Ergo Propter Hoc
Revvy's Avatar
Dec 2007
"Detroitish" Michigan
Posts: 40,925
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Lactobasillus stinks to high heaven. And will take hold within a few hours, as soon as the grain drops below pasturization temps.

I once got nearly attacted by a pack of LLamas for trying to feed them few days old, stored in the freezer, spent grain, that started to thaw on the hour drive in the summer.

I almost died, I swear......

Lamma spit ain't fun.
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