2 batches from same grain

[jennasbiotch]

I am doing an Imperial Ipa then doing a small beer with same grains tomorrow. I've never done this before and was wondering on the second batch if I need to sparge or not? I've got 25# of grain and I want 2, 5 gal batches.

 

[Sir-Hops-A-Lot]

I think this is doable but you may want to treat the 2nd batch as the sparge.
I think over-sparging risks tannin extraction. A tasted a second running beer by an experienced brewer and it had the bite of tannins.

 

[1977Brewer]

First runnings - first beer. Sparge runnings for # 2. Google "parti-gyle process" for more details. 25 lbs is huge, even for this. I got a 5.75 IPA and a 3.6 mild out of 14 lbs.

 

[Dolomieu]

The term is parti-gyle search for that and you will find a lot of info on the subject

https://byo.com/grains/item/1963-parti-gyle-brewing-techniques

 

[jennasbiotch]

Ok thanks!

 

[FirstAidBrewing]

Do not sparge the first runnings. That "sparge" will become your second beer. As Dolomieu said, this is what's known as a parti-gyle

 

[RM-MN]

Do not sparge the first runnings. That "sparge" will become your second beer. As Dolomieu said, this is what's known as a parti-gyle

I'd probably do a double sparge for the second runnings and I might consider doing a small sparge for the first runnings too. The danger of oversparging is that you raise the pH each time you sparge. If you get the pH over about 6.0, you do risk tannin extraction. Nobody told me that I couldn't acidify my sparge water though.

If you have a pH meter you can sample your second runnings and see if your pH is getting too high.