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Old 05-25-2009, 07:28 PM   #1
riored4v
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Default Batch sparge times...

Having a discussion with someone regarding length of batch sparge times. Palmer swears by 15min rests after sparging and my buddy is swearing by the same. I usually just sparge, stir, vorlauf and drain w/in 0-5min. He's thinking by letting the sparge water sit in the grains longer we will get better effeciency but I coulda swore I remember reading a good thread on here about how someone experimented with these times and concluded that you could let it sit for up to 30min and the effeciency wouldnt increase as long your initial mash had full conversion of the grains. Can anyone confirm this, or if nothing else point me in the direction of that thread? I've tried searching and was unable to locate it.

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Old 05-25-2009, 07:46 PM   #2
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I'd tend to agree with you. The conversion process is done. You are just rinsing the grains. I just add the sparge stir the holy hell out of it and vorlauf for about 10 minutes then repeat with the 2nd sparge. You may be thinking of bobby_m's technique if so the links in his sig.

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Old 05-25-2009, 11:15 PM   #3
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I agree with you guys. Initially I would let my sparge water sit for awhile before draining and I got a higher efficiency, but it turns out I wasn't fully converted. Now I mash slightly longer and drain the sparge right away, after stirring quite a bit of course!

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Old 05-25-2009, 11:45 PM   #4
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I don't rest and get about 80% efficiency batch sparging. I do stir thoroughly before every runoff though.

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Old 05-25-2009, 11:59 PM   #5
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I just recently started batch sparging and I noticed that my effgiciency is not as good as when I fly sparged. I think it might be because I dont stir before I drain and that might be my problem.

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Old 05-26-2009, 05:15 PM   #6
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Originally Posted by baer19d View Post
I just recently started batch sparging and I noticed that my effgiciency is not as good as when I fly sparged. I think it might be because I dont stir before I drain and that might be my problem.
Yes, that can certainly do it.

FWIW, sparge rest time is one thing I've tested repeatedly. I've found there is absolutely no benefit to any rest after adding the sparge water. I just stir in the water, vorlauf, and runoff.
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Old 05-26-2009, 05:35 PM   #7
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So lets say you mash for 60 min, do you then stir it before collecting your first runnings?

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Old 05-26-2009, 05:40 PM   #8
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So lets say you mash for 60 min, do you then stir it before collecting your first runnings?
No need to stir after the mash, just make sure you have conversion. Stirring just serves to make sure you rinse all the grain and evenly distributes the water. You can get dough balls sparging just as easily as when mashing.
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Old 05-26-2009, 06:17 PM   #9
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I don't rest and get about 80% efficiency batch sparging. I do stir thoroughly before every runoff though.
I think that might be where i'm suffering. I've been getting around 70-73% but i only stir after adding the sparge water and always forget before runoff.

Do you get your grains locally, or do you mill your own?
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Old 05-26-2009, 07:11 PM   #10
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I mill my own.

You don't have to stir before the first runoff. Just the sparging runoffs. 70-73%, particularly with store-milled grain, is a perfectly acceptable efficiency.

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