Tell me why it won't work - aeration with compressor

Homebrew Talk - Beer, Wine, Mead, & Cider Brewing Discussion Forum

Help Support Homebrew Talk:

datamike

Well-Known Member
Joined
Apr 13, 2007
Messages
105
Reaction score
3
We all know there are several ways to aerate wort; 02 bottle and diffusion stone, rocking the fermenter, aquarium air pump and diffusion stone, etc.

So my question is: if aerating with an air pump and a inline filter is OK, why not just use a compressor and inline filter? Isn't a pump just a low-volume/low-pressure compressor? Seems like using a compressor would bring the benefit of quick aeration without the cons of cost and running out of 02.

Discuss!

Michael
 

HenryHill

Well-Known Member
Joined
Mar 9, 2007
Messages
3,039
Reaction score
13
Location
Perry, MI
You DO realize that most compressors have a crankcase with a piston and rings, and that compressor oil leaks past the rings? There are oil-less compressors, but they are not that common and my guess is you don't have one.

It isn't a big thing to get a Bernzomatic O2 tank for 10 bucks and an Oxynator and just do it the accepted way. ;)
 

beerocd

Well-Known Member
Joined
Nov 27, 2008
Messages
696
Reaction score
5
With a filter and a regulator set really low I see no reason it wouldn't work. You should probably rig up some food safe hose on the end that touches your beer. The aquarium pump and the home depot O2 bottle are both very cheap. A compressor is way overkill for this application in terms of cost and capacity. And there's also that shop air smell - I don't know that a filter would remove that. So I would guess that's probably why you haven't seen it.

Next up: Hot Tub RIMS system :rockin:

-OCD
 

jcdillin

Well-Known Member
Joined
Mar 7, 2008
Messages
641
Reaction score
3
Location
Miami, FL
I've had the same bottle of O2 now for over 6 batches and i'm pretty heavy with it.

I'm not sure it would be worth trying to find a oil less diaphragm pump just to aerate the beer.
 

wilserbrewer

BIAB Expert Tailor
HBT Sponsor
Joined
May 25, 2007
Messages
11,265
Reaction score
2,856
Location
New Jersey
I'm sure it would work fine depending on the compressor you intend to use. I would think there is everything from "medical" or breathing air compressors to constuction grade compressors. i wouldn't use a diesel powered 185 cfm ingersol rand!

Sure you could carve the holiday roast w/ a chainsaw if you wanted to.
 

bluehouse

Well-Known Member
Joined
Jan 20, 2009
Messages
345
Reaction score
4
I have a nebulizer that I can sanitize completly that has no oil etc I bought it at a garage sale for $5.00, cause one of my kids needed a spare to leave at Oma's. I never thought of using it for this but I might try it out and let you know.
 
Joined
Dec 15, 2008
Messages
530
Reaction score
59
Location
Huntington Beach
smell the air coming out of your compressor.

One other thing to consider is that the inside of the tank is typically very humid from the moisture being extracted and also there is usually rust in the there as well.

When I worked at a SCUBA shop we had a huge 4 stage compressor that we had to service regularly with a very expensive oil made for compressors that service breathing gas. We also had a bank of super expensive filters for removing that oil and the moisture. There were 6 of them and they were about 2' long X 6" diameter and I seem to remember them being $100 each.

With the economy the way it is I'm sure you could pick one of these babies up for about $5,000 right now.

Yes sir, nothing like aerating your wort with 4,000 psi !

Seriously though, smell the air coming out of your compressor and decide if you want that going in your wort, filter or no filter.
 

brrman

Well-Known Member
Joined
Oct 27, 2006
Messages
1,655
Reaction score
104
Location
Indianapolis, IN
You DO realize that most compressors have a crankcase with a piston and rings, and that compressor oil leaks past the rings? There are oil-less compressors, but they are not that common and my guess is you don't have one.

It isn't a big thing to get a Bernzomatic O2 tank for 10 bucks and an Oxynator and just do it the accepted way. ;)
Oil-less compressors are extremely common. Nearly every pancake compressor sold in the big box stores are oil-less. I have one myself.

However - i would never use it to aerate my wort.
 

giligson

Well-Known Member
Joined
Oct 1, 2008
Messages
758
Reaction score
4
Location
Vancouver Area - Canada
The cost of cleaning up the air coming out of the compressor is much greater than the cost of the other options.

I like the nebulizer pump option - that is medical grade air - nomadjanet picked it up at a great price.
 

Joe Camel

Well-Known Member
Joined
Mar 15, 2008
Messages
282
Reaction score
4
Location
Charlottetown, PE, Canada
You could use one of those 12V tire inflator compressors, they're oilless I believe, which is why you can only run them for 10 minutes before they need cooling. with the right air filter, you could lock it into the valve lock and run sterile tubing from there to the stone.
 

springer

Well-Known Member
Joined
Feb 12, 2008
Messages
4,736
Reaction score
34
Location
Wappingers falls NY
It would work ... But whats the advantage ? It will still take as long to aerate the wort as with the aquarium pump you are not really going to pump any more threw the stone than what the pump can.

I really don't like the idea of pumping air from the compressor to the wort .. Ever look at the water that comes out of the tank when you drain it? Black brown rusty moldy crap....
 

bull8042

I like 'em shaved
Lifetime Supporter
Joined
Jul 16, 2008
Messages
10,259
Reaction score
458
Location
Fort Mill
I just drilled my carboys for a valve stem, but I can't find any stainless ones. Can I use brass valve stems with the little blue LED in the cap? :D
 

hollowdp

Well-Known Member
Joined
Sep 13, 2007
Messages
73
Reaction score
1
Location
Arlington, VA
I know for a fact that commercial brewers use this. I was lending a hand at the Gordon Biersch in Virginia Beach and the brewer uses one of those sanitary filters to filter the air coming out of his craftsman compressor which he uses to aerate his wort.
 
Top