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-   -   Batch sparge - single or double? (http://www.homebrewtalk.com/f36/batch-sparge-single-double-69368/)

cee3 06-16-2008 07:31 PM

Batch sparge - single or double?
I'm going to be brewing a Belgian Strong Golden ale with the following:

Batch Size: 5.00 gal
Boil Size: 6.50 gal
Estimated OG: 1.082 SG
Estimated Color: 4.6 SRM
Estimated IBU: 26.6 IBU
Brewhouse Efficiency: 75.00 %
Boil Time: 75 Minutes

Amount Item Type % or IBU
11 lbs 8.0 oz Pilsen (2 Row) US (1.0 SRM) Grain 76.01 %
14.1 oz Cara-Pils/Dextrine (2.0 SRM) Grain 5.82 %
8.0 oz Caramel/Crystal Malt - 10L (10.0 SRM) Grain 3.30 %
4.0 oz Aromatic Malt (26.0 SRM) Grain 1.65 %
1.50 oz Mt. Hood [4.50 %] (60 min) Hops 20.1 IBU
0.50 oz Saaz [4.00 %] (15 min) Hops 2.9 IBU
0.50 oz Mt. Hood [4.50 %] (15 min) Hops 3.3 IBU
0.50 oz Saaz [4.00 %] (1 min) Hops 0.3 IBU
0.50 tsp Irish Moss (Boil 10.0 min) Misc
1.00 tbsp PH 5.2 Stabilizer (Mash 60.0 min) Misc
2 lbs Candi Sugar, Clear (0.5 SRM) Sugar 13.22 %
1 Pkgs Belgian Strong Ale (Wyeast Labs #1388) Yeast-Ale

My question is would it be better to do a single sparge at 168 with 4.2 gal or 2 sparges of 2.1 gal each, the first a bit hotter?

Bobby_M 06-16-2008 07:38 PM

2 sparges at about 180F would be my recommendation. See my all grain primer in my sig.

fishops 06-16-2008 08:40 PM

The last time I rushed my process and did one single batch sparge, my efficiency dropped 10 points. I also drained it too quickly and didn't let the bed settle. Definitely do two infusions and take your time.

185 would be my recommendation, 168 before going into the mash is almost certainly not hot enough.

david_42 06-16-2008 10:48 PM

Definitely two & sparge hot. Several people have performed experiments using identical grain bills & two hot sparges always wins.

cee3 06-19-2008 09:29 AM

Thanks for the advice. Forgive my ignorance, I haven't done it before, but It seems like 2.1 gal (8.4 qt) in 13+ lbs of grain would be awful thick. Maybe with the sparging that's not critical.

Bobby_M 06-19-2008 11:49 AM

You're right. .6 quarts/ lb on a sparge is a on the borderline side to make it stirrable but not completely off the wall. This is a relatively big beer with a small preboil volume. I might be prone to do a 1 gallon (boiling water or close) mashout infusion, drain, then a single sparge of 3.25 gallons at 170F on this one.

mmb 06-19-2008 01:59 PM

Looks like this might be a good session for a party gyle....

cee3 06-19-2008 04:16 PM


Originally Posted by Bobby_M (Post 719381)
I might be prone to do a 1 gallon (boiling water or close) mashout infusion, drain, then a single sparge of 3.25 gallons at 170F on this one.

That sounds like it might be a good plan. Thanks Bobby!

dstar26t 06-19-2008 04:32 PM

What is the minimum amount of sparge water to grain ratio? I've been trying to stay close to 1qt/lb and do 2 sparges after draining the first runnings. Does thickening the ratio reduce efficiency?

Bobby_M 06-19-2008 04:53 PM

I've taken some guesses that efficiency would only really start suffering when it gets so thick that it's hard to adequetely stir. Judging by my experiences with different grain bills, I THINK .5qts/lb is where it goes south.

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