Wort Aerator.... - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Wort Aerator....

Reply
 
Thread Tools
Old 11-30-2008, 02:05 AM   #1
Pelikan
Recipes 
 
Oct 2008
Q Continuum
Posts: 899
Liked 11 Times on 10 Posts



For those that have O2 Aerators, were they worth it?


__________________
Back to brewing! It's been too long!!

 
Reply With Quote
Old 11-30-2008, 02:30 AM   #2
Revvy
Post Hoc Ergo Propter Hoc
HBT_LIFETIMESUPPORTER.png
 
Revvy's Avatar
Recipes 
 
Dec 2007
"Detroitish" Michigan
Posts: 40,891
Liked 3163 Times on 1871 Posts


I use the airstone on a pieces of racking cane with an O2 bottle and my beer seems to like it...but it's really hard to say how different they are unless I did a bck to back comparrison of the same recipe, the same yeast and shook the crap out of one, while giving the other a blast.

All I know is that it saves me shaking and or stirring and gets the yeast pitched a few minutes faster.


__________________
Like my snazzy new avatar? Get Sons of Zymurgy swag, here, and brew with the best.

Revvy's one of the cool reverends. He has a Harley and a t-shirt that says on the back "If you can read this, the bitch was Raptured. - Madman

I gotta tell ya, just between us girls, that Revvy is HOT. Very tall, gorgeous grey hair and a terrific smile. He's very good looking in person, with a charismatic personality... he drives like a ****ing maniac! - YooperBrew

 
Reply With Quote
Old 11-30-2008, 03:06 AM   #3
Endovelico
Recipes 
 
Oct 2008
Posts: 238

Yeah, i would like to know this aswell, as they don't seem that expensive.

 
Reply With Quote
Old 11-30-2008, 03:12 AM   #4
FireBrewer
 
FireBrewer's Avatar
Recipes 
 
May 2007
Fallston, MD
Posts: 1,959
Liked 14 Times on 12 Posts


Pure O2 is the most efficient way to get oxygen into the wort.

Yes, shaking it, paint stirrers, and aquarium pumps get some oxygen in too, just not as much:

MB Raines, Ph.D. - Guide to Yeast Culturing for Homebrewers - Maltose Falcons Home Brewing Society (Los Angeles Homebrewing)

Quote:
In general, it is difficult for homebrewers to achieve sufficient oxygen levels. The levels of oxygen necessary for optimal fermentation vary depending on the yeast strain. Ale strains usually need between 8-12 part per million (ppm) while lager strains require slightly higher amounts (10-15 ppm). At atmospheric pressure the maximum level of dissolved oxygen in wort is approximately 8 ppm and the saturation level decreases further as the gravity of the wort increases. Thus unless special steps are taken to introduce air or oxygen into the wort, it is difficult for homebrewers to achieve adequate aeration. Recent studies have shown that oxygenation is by far more efficient than aeration. Injection of oxygen through a 2 micron diffusing stone can actually supersaturate the wort with 10-12 ppm of dissolved oxygen being reached in 5 gallons of wort by a single 60 second blast of oxygen!
That said, oxygenation stones aren't the be-all, end-all. Focus on getting the correct amount of healthy yeast in and you won't need to add as much:

Quote:
Most homebrewers start out pitching a Wyeast packet. How much are you actually underpitching with one of these 50 ml pouches? Assuming all the yeast in a Wyeast packet are viable (only about 25% truly are!), we are adding only 50 ml of about 60 million/cells per ml. This translates into a pitching rate of 150,000 cells per ml (Table 4). Thus with a single Wyeast packet you are underpitching by a factor of at least 35 for ales and almost 100-fold for lagers. What is the big deal about underpitching? Well remember that very little yeast growth should go on in the fermenter. There should be no more than 3 or 4 cell division which should take place during the first few hours of fermentation. If underpitched the yeast will spend much more time trying to grow to adequate quantities. During this extended growth period the yeast tend to secrete more esters and fusel alcohols. Moreover they may not have a sufficient number to adequately metabolize (digest) all of the fermentable sugars. So what you end up with is a beer with off-flavors (such as esters, fusel alcohols, diacetyl, acetaldehyde) and a high finishing gravity. Thus it is important to always make a starter and make it a relatively big one. Remember that you want the yeast to spend most of their energy making alcohol not babies in a fermenter!!


 
Reply With Quote
Old 11-30-2008, 04:36 AM   #5
MoRoToRiUm
Recipes 
 
Jun 2008
Posts: 1,389
Liked 5 Times on 4 Posts


Wort. Shaken, not stirred.

I've debated getting a stone before, but I've never had an issue with a good shaking, plus it's one less piece of brew equipment to take up room and worry about sanitizing and possible contamination of my brew.

 
Reply With Quote
Old 11-30-2008, 04:49 AM   #6
TXCrash
HBT_SUPPORTER.png
 
TXCrash's Avatar
Recipes 
 
Sep 2005
DFW
Posts: 27,162
Liked 3230 Times on 3132 Posts


I used a modified version of this technique the other day and was impressed... I only made 1 hole and it seemed to do the trick...

 
Reply With Quote
Old 11-30-2008, 08:35 AM   #7
happymonk
Recipes 
 
Nov 2008
Louisville
Posts: 17
Liked 1 Times on 1 Posts


No contest, a sanitized stone and some o2 can not be beat... I can ferment out in 3 days with good o2 airation. I can hit 13% in 4 days with no problems with fresh yeast and o2. Less chance of infection is less chance... Sometimes i will purge my fermenter with co2 then after racking wort in blow o2 in...That said stones need care to keep clean, i soak mine in pure grain and light it up before use...
__________________
Flowing: Dubble, Flanders Stout, Imperial Stout
Put to bed: Barleywine, Eisbock, Flanders Red, Kriek, Framboise, Brandy Barrel Mead
In Theory: Gand Cru, Belg Pale

 
Reply With Quote
Old 11-30-2008, 02:33 PM   #8
joejaz
 
joejaz's Avatar
Recipes 
 
Sep 2007
New Jersey
Posts: 373
Liked 3 Times on 3 Posts


Try this aeration process, my son invented it, works great. Attach tube to auto siphon, put auto siphon into carboy or bucket and pump it about 50 time returning wort back to bucket or carboy.
__________________
Joe

"Life is too short to drink cheap beer."

 
Reply With Quote
Old 11-30-2008, 03:01 PM   #9
beerthirty
big beers turn my gears
HBT_LIFETIMESUPPORTER.png
 
beerthirty's Avatar
Recipes 
 
May 2008
Podunk, VA. Not far from the NC line.
Posts: 2,581
Liked 31 Times on 14 Posts


I brew 10G batches, that are split between 2 6G buckets. When I run out of O2 in the middle of the process, then #1 bucket aways starts and finishes faster then #2 bucket. So yes I have found O2 worth it. My stone is built into the outlet of my CFC, so it gets sanitized at the same time I recirc through the CFC before cooling. Now I just need a larger bottle of O2 or learn to keep a spare worthington bottle on hand.
__________________
Quote:
Originally Posted by the_bird View Post
"I've got a fever... and the only prescription is, MORE CARBOYS!"
primary- Tangerine Dream, SWMBO slayer,
serving- amber ale hop experiment #6, Roggenbier, apfelwine
planning- Cru?
conditioning- 9/9/09 barleywine
Drink water?... Never, fish fornicate in it.--- W.C. Fields
Most problems can be solved with the proper application of force.

 
Reply With Quote
Old 11-30-2008, 03:14 PM   #10
King of Cascade
Recipes 
 
Feb 2008
Posts: 656
Liked 6 Times on 6 Posts


In a small beer the effectiveness is debatable but for a big beer like barley wine itís a must to get the attenuation down to the level that is preferred. The yeast need a head start to take on all the sugars of big beers and the O2 gives it to them.



 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Aerator bechbd DIY Projects 25 09-16-2011 12:14 PM
Does my aerator work? kjbatt Equipment/Sanitation 3 08-31-2008 03:43 PM
Help! My aerator is bubbling over SDBrewer08 Beginners Beer Brewing Forum 3 03-03-2008 05:40 PM
Aerator joejaz Equipment/Sanitation 8 01-15-2008 02:16 AM
mattress inflator as aerator? mxyzptlk Equipment/Sanitation 5 11-07-2005 04:01 AM


Forum Jump