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Old 09-08-2007, 06:28 PM   #1
Bobby_M
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I've mentioned in previous posts that I've acheived vastly different batch sparge efficiencies depending on certain factors:

No mash out, double sparge = 75% (NMODS) I actually listed this as a single sparge before but just double checked my notes.
Mash out, single sparge = 80% (MOSS)
Mash out, double sparge = 86% (MODS)

I did a 10 gallon batch yesterday and hit 80% again using the Mash Out + single sparge. I knew it could have been better because the very last of the sparge runnings was still 1.025. In my MODS (mash out double sparge) trial, the last running was exactly 1.010.

Anyway, I don't have any reason to ignore the benefit of the MODS process. The only downside is an additional vorlauf which adds 5 minutes to my day. By the way, I don't let any sparge "rest"... I stir, vorlauf and drain in 5 minutes or less each.

Hope this helps.
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Old 09-08-2007, 06:32 PM   #2
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So, you must be collecting more total wort with MODS than with MOSS; how much more, and are you doing a longer boil as a result? Or, are you just sparging the same total amount, just splitting it into two?
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Old 09-08-2007, 06:35 PM   #3
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What do you mean by double sparge? Do you use twice the amount of sparge water , or split the normal sparge amount in half.
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Old 09-08-2007, 06:36 PM   #4
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Sorry. Good point.. No, always the same pre-boil volume of 7.25g for a 6g post. I just split the sparge as equal as I can get it. Oh, and the mash out volume is whatever volume of boiling water it takes to get me into the upper 160's which I learn from beertoolspro.
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Old 09-08-2007, 06:40 PM   #5
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Hell, I'd be stoked with the 75% at this point!

I've been wondering about the whole "let it rest 10 minutes before vorlaufing and draining" thing - just seems like it gives more time for the sugars to settle back into the grains (more than allowing more sugars to dissolve). So, I'm going to cut that rest out next time and see if I get any improvement.
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Old 09-08-2007, 06:44 PM   #6
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Thanks for posting this. Giving me more to think about........




Cheers!
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Old 09-08-2007, 07:06 PM   #7
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I cut my sparge water rest time to a coupl of minutes and have had no drop in effieciency.

I wort mash water split my sparge water into 2 equal part.
I don't mash out but use sparge water at 170f
dump in the sparge water, stir, let the grain settle, vourlauf and drain fast.
Repeat.

Job done.
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Old 09-08-2007, 07:11 PM   #8
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I did MODS with my RyePA last weekend and hit 82% efficiency on my second ever mash.

I read it from one of your previous posts, did all the calcs by hand from Palmer, and couldn't be happier! Thanks, Bobby!

 
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Old 09-09-2007, 12:13 AM   #9
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Hmmm. I've tried it several ways too, but I'm not sure if I always kept track of which method I was using. It's the most work and I wasn't sure I was gaining anything by it. I'm usually ~ 70% +/- a few points. I'll give it another shot next brew and see what I get.
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Old 09-09-2007, 12:29 AM   #10
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I've always fly sparged, but I may need to give this a try. I routinely hit 85-92% with the fly, but if I could hit 85 or 86 with a batch, I would be happy. How long does the MODS take you? I think I may like this idea if it cuts a significant amount of time off.
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