Crud floating in boil kettle - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Brew Science > Crud floating in boil kettle
Cool Brewing Giveaway - Supporting Membership Drive & Discount

Reply
 
Thread Tools
Old 05-16-2009, 08:12 PM   #1
ipscman
Recipes 
 
Aug 2008
Oakland, OR, Oregon
Posts: 108
Liked 3 Times on 3 Posts



AG brewer.

I see two phases of crud (pre-hop addition) developing on top of the boil. First is dark brown. I believe it is primarily polyphenols and protein coagulating. I probably scoop out 2 full cups of that. It seems a bit oily as well which I assume means I'm getting rid of excess lipids.

Secondarily, I see white grunge.

Question: Can anyone tell me what makes-up each of these developments?

RE lipids (?). I always have good fermentations so this doesn't seem to be a problem. I assume that removing this excess helps with foam development and head retention.

???



 
Reply With Quote
Old 05-17-2009, 02:43 PM   #2
COLObrewer
Recipes 
 
Jan 2009
Pea Green, Colorado
Posts: 2,934
Liked 60 Times on 53 Posts


Hmmm, I've never removed anything from the boil, except maybe a bag of hops at the end. I can't answer any of your questions, I don't know why I'm replying to this except I was wondering why you remove them? It sounds like hot break which IS coagulated protein if that helps any.



 
Reply With Quote
Old 05-17-2009, 04:07 PM   #3
ipscman
Recipes 
 
Aug 2008
Oakland, OR, Oregon
Posts: 108
Liked 3 Times on 3 Posts


Quote:
Originally Posted by COLObrewer View Post
Hmmm, I've never removed anything from the boil, except maybe a bag of hops at the end. I can't answer any of your questions, I don't know why I'm replying to this except I was wondering why you remove them? It sounds like hot break which IS coagulated protein if that helps any.
Very thoughtful of you to respond. The reason for removing this comes from a number of sources. The winner of the California AHA (brewer of the year) does it religiously. It seems the reason has to do with the effect this has on the final product:

1. Chill and permanent haze (removal of polyphenols/tannins, and protein)

2. Foam production and head retention (removal of lipids)

3. Staling byproducts (all of the above contribute to staling in the beer)

4. Taste effect

5. Korzonas (Homebrewing, Vol 1, p. 76) recommends it for better hop utilization, believing that the hot break coats the lupelin glands and restricts the isomerization of the resins.

If you listen to the brewcastingnetwork you'll find that a number of the "experts" remove the above by filtering, believing that all of the above are results of that. For those that don't filter, this is a poor man's approach to removing the same earlier in the process.

We learn together. Thanks for participating.

Happy brewing.


 
Reply With Quote
Old 05-17-2009, 04:13 PM   #4
COLObrewer
Recipes 
 
Jan 2009
Pea Green, Colorado
Posts: 2,934
Liked 60 Times on 53 Posts


This is good to know for future reference if I ever have any of those problems, thanx much. I wonder if water chemistry has a profound effect on any of that, but, everything probably will effect it.

 
Reply With Quote
Old 05-19-2009, 03:51 PM   #5
BuzzCraft
Recipes 
 
Jan 2009
Blacksburg, VA
Posts: 426

I've also read that removing the hot break allows for better hop utilization....something to the effect of the break coating the hop particles. Don't know how much science is there, but it was suggested to get a vigorous boil, remove break, then add bittering hops.

Anyone else come across this recc?

 
Reply With Quote
Old 05-21-2009, 05:48 PM   #6
ipscman
Recipes 
 
Aug 2008
Oakland, OR, Oregon
Posts: 108
Liked 3 Times on 3 Posts


Quote:
Originally Posted by BuzzCraft View Post
I've also read that removing the hot break allows for better hop utilization....something to the effect of the break coating the hop particles. Don't know how much science is there, but it was suggested to get a vigorous boil, remove break, then add bittering hops.

Anyone else come across this recc?
Yes, I read this in Korzonas (Homebrewing, vol. 1). He believed it to be true based on logic, but had not actually tested the theory.



 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hey Everybody - Look at my new Boil Kettle! John Beere Equipment/Sanitation 54 02-16-2014 11:09 PM
Whats this floating in my beer during the boil? s1080 All Grain & Partial Mash Brewing 4 04-19-2009 05:02 PM
whats floating in my boil? squeekysheep All Grain & Partial Mash Brewing 6 02-19-2009 01:15 AM
Boil Kettle kdp Equipment/Sanitation 1 09-27-2008 03:30 PM
Turkey Fryer Kettle for Boil Kettle? SenorWanderer General Techniques 3 09-06-2007 07:52 PM


Forum Jump