Aeration / Oxygenation - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Aeration / Oxygenation
Sign-up To NEW HBT Article Newsletter - Brewing Articles Direct To You!

Thread Tools
Old 02-28-2007, 03:01 AM   #1
Feedback Score: 0 reviews
Join Date: Nov 2006
Location: Winston-Salem, NC
Posts: 74
Liked 2 Times on 1 Posts

Default Aeration / Oxygenation

I don't quite understand this concept yet.

At the beginning when adding the yeast you want to shake up the wort to get plenty of oxygen in there for the yeast. But, later when transferring to a secondary you want to prevent shaking and splashing or you'll wind up with oxidized, stale beer?

Sometimes I read splashing is bad but other times it's necessary. Can anyone put a little more science into the explanation for me?

1fastdoc is offline
Reply With Quote
Old 02-28-2007, 03:22 AM   #2
Feedback Score: 0 reviews
Join Date: Feb 2007
Location: Nebraska
Posts: 205
Liked 1 Times on 1 Posts


This is actually pretty simple. Yeast needs O2 in order to reproduce. You need that to happen so you have enough yeast to digest all the fermentable sugars in the wort. Once the O2 is depleted, the yeast pretty much stop reproduction and begin eating the sugars. By the time you rack to secondary, the yeast are pretty much dormant. Any O2 introduced at that time will not be utilized by the yeast because there is little or no food and as such no reproduction will take place. The O2 then binds with compounds in the beer causing a taste similar to that of wet cardboard. Not a flavor you want in a beer. A little oxidation does work in some strong ales such as barleywine, old ales, and some strong belgian ales. That, however comes from long aging and gradual seepage of air into the bottles and from the small amounts of air inadvertently introduced during bottling and other handling.

Hope this helps.

Bugeater Brewing Company
Bugeaterbrewing is offline
Reply With Quote

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
The definitive aeration/oxygenation experiment Bobby_M General Techniques 72 11-07-2010 02:38 PM
02 aeration (oxygenation?) murphyslaw General Techniques 13 06-18-2009 07:35 PM
Aeration / Oxygenation while transferring from kettle 85 Haro Designs Beginners Beer Brewing Forum 5 02-05-2008 04:03 PM
My own aeration oxygenation problems bandt9299 General Techniques 7 02-04-2007 10:07 PM
oxygenation vs aeration abracadabra Beginners Beer Brewing Forum 11 01-03-2007 01:09 AM

Forum Jump