Oxygenating Wort

[GuingesRock]

I don't know that for sure, just assuming.

I'd think you'd want a certain flow rate for a certain amount of time..though from the quick reading I've done, I've read it's hard to over oxygenate. So the only real advantage may be less wasted oxygen?

On the other hand, it is more crucial to have enough. So I presume, with an inline oxygenator, using a certain flow rate for a certain time would give you more confidence in that department? I wonder where I can find the calculations for an inline.

[AllanMar]

I have a spare (used) regulator just like that that I could sell relatively cheap BTW.

Scratch that, mine is high pressure on the tank side, and flow control (l/min).

If guinges doesn't end up taking it, I'm interested.

[NASH]

It's all moot. if you like the possibility of blowing things up then use the flow meter as opposed to the pressure gauge

Surely the flow meter gauges have a built-in PRV for safety. Anyhow, there's crap online where peeps have done dissolved O2 tests but again, it's not in a lab controlled environment so results will vary, a lot. You're better off with a standard pressure regulator and use it in the way I learnt ya in my post you linked to.

[RubberToe]

Flow metre or not the usage is much the same isn't it? Dial it back when you see O2 coming from your stone, otherwise you're wasting it. I let it bubble up a bit and the flow is barely above 1 litre / min. I've calculated the target O2 concentration before and it ended up being around 1 lpm for a minute. YMMV and I can't measure the disolved O2. Some people here can though.

[NASH]

Flow metre or not the usage is much the same isn't it? Dial it back when you see O2 coming from your stone, otherwise you're wasting it. I let it bubble up a bit and the flow is barely above 1 litre / min. I've calculated the target O2 concentration before and it ended up being around 1 lpm for a minute. YMMV and I can't measure the disolved O2. Some people here can though.

BAMM and bingo! That's right. TubberRoe to the rescue

I think it's JohnG that was doing the O2 tests here.

Add O2 til you see it, other than that you're scrubbing and oxidizing wort.

[mr x]

That's the nice thing about the medical regulators, they have click settings for flow. Fwiw, I pretty sure all integrated flow control regulators will not pass tank pressure if you dead head them . On the other hand, I don't think the flow range is right on the welding type...

Sent from my Nexus 4 using Tapatalk 4

[NASH]

That's the nice thing about the medical regulators, they have click settings for flow. Fwiw, I pretty sure all integrated flow control regulators will not pass tank pressure if you dead head them . On the other hand, I don't think the flow range is right on the welding type...

Sent from my Nexus 4 using Tapatalk 4

They won't pass tank pressure, but I've had them blow hoses.

[AllanMar]

The flow regs should have ratings on them for what the pressure is. 50psi is common IIRC.

[NASH]

Yup that sounds about right.

[GuingesRock]

What size/cost? If you don't mind me asking.

Allan, I picked up my tank of O2 just now and I have the costs. I chose the size 16 which is a liquid volume of 16L, which I think = 35 lbs liquid O2 (approx.) I weighed on the bathroom scales and the full tank weighs 50lbs, which is the same as a corny full of beer. To lease the tank costs $68 per year and the oxygen in it was $42.44. If it runs out, and I doubt it ever will, you take it back and swap it for a full one and that costs $42.44 again. The tank I got was the smallest available for lease. When the year is up, they send you a bill for the following year's rental, and at that point you can either pay the bill or return the tank.

Size 22 is Lease $90 per year and 02 fill is $63.84. Size 44 is also lease $90 per year and the fill is $63.84.

I got it from Nova Industrial Supplies Ltd. in New Minas.

Thanks Rob (RubberToe) for the reg. It works well. I took the other one back and that just about paid for the tank rental and the O2.

[RubberToe]

Looks great. Lifetime supply of O2, lol.

[GuingesRock]

I wonder, if I ran that tank at 1L per minute, how long it would take to empty it and if it requires 2 mins at 1L/min for a 5 gallon batch, how many batches is that? Then, if I make 10 gallons per week, how many years?

[AllanMar]

Thanks for the info.

I wonder, if I ran that tank at 1L per minute, how long it would take to empty it and if it requires 2 mins at 1L/min for a 5 gallon batch, how many batches is that? Then, if I make 10 gallons per week, how many years?

Roughly (some assumptions here):
P(1)V(1) = P(2)V(2)
I think those tanks are around 2000psi? (16L volume)
2000psi * 16L = 14.7psi * V(2)
V(2) = 2177L O2 at atmospheric pressure.
2L per batch = ~1088 batches

[GuingesRock]

Thanks for the info.

I wonder, if I ran that tank at 1L per minute, how long it would take to empty it and if it requires 2 mins at 1L/min for a 5 gallon batch, how many batches is that? Then, if I make 10 gallons per week, how many years?

Roughly (some assumptions here):
P(1)V(1) = P(2)V(2)
I think those tanks are around 2000psi? (16L volume)
2000psi * 16L = 14.7psi * V(2)
V(2) = 2177L O2 at atmospheric pressure.
2L per batch = ~1088 batches

Thanks Allan, That's 11 years.

[GuingesRock]

I was Googling, and read on some thread, on some site, that commercial breweries, using inline oxygenators, inject 8 Litres of oxygen per barrel of wort. Does that sound like it might be true?

1 Barrel = 117 Litres.

So for my 12 gallons (45L), I should use 45/117 x 8 = 3L O2 = 1L per minute for 3 minutes.

Does that sound OK?

With my system, I won’t be oxygenating inline on the way to the fermentor, instead, I’m oxygenating inline on the way back to the same pot with the whirlpool pump. I can’t decide if that should make a difference. Hopefully not?

[AllanMar]

I was Googling, and read on some thread, on some site, that commercial breweries, using inline oxygenators, inject 8 Litres of oxygen per barrel of wort. Does that sound like it might be true?

1 Barrel = 117 Litres.

So for my 12 gallons (45L), I should use 45/117 x 8 = 3L O2 = 1L per minute for 3 minutes.

Does that sound OK?

With my system, I won’t be oxygenating inline on the way to the fermentor, instead, I’m oxygenating inline on the way back to the same pot with the whirlpool pump. I can’t decide if that should make a difference. Hopefully not?

Sounds reasonable. The yeast book details a White Lab study that goes in to this, I would start there.

[GuingesRock]

Sounds reasonable. The yeast book details a White Lab study that goes in to this, I would start there.

Thanks. Page 79 ...found it.

From that page ....using a 5 micron stone, using pure O2, injecting into 5.3 gallons of 1.077 wort at the rate of 1L per minute:

60 seconds gave a dissolved O2 of 9.2 ppm

120 seconds gave a dissolved O2 of 14.08 ppm

[GuingesRock]

Just put together inline oxygenator. Boiling in a pot, ready for use this afternoon. Fittings came from Dave's.

[GuingesRock]

Inline oxygenator in action. This brewing game is fun

[RubberToe]

Did any wort flow back into your O2 tubing?

I have the same stone now and I'm waiting for my conical before using it.

[GuingesRock]

Did any wort flow back into your O2 tubing?

I have the same stone now and I'm waiting for my conical before using it.

Yes it did and I was expecting it to. I plan to get a fresh O2 line each time from the medical supplies shop. They are sterile and sealed in a plastic bag and are about $3. I gave up on the inline air filter idea, didn't fit the tubing and I didn't see the point.