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Old 12-30-2010, 03:42 AM   #1
fishermand715
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Default What is the reason for sealing your fermenter (air tight)

I know that it is for keeping germs and what not out of the brew but is their more? And something off topic here; Does anyone know what a unhopped beer is call? I have heard malt liquor but i dont know.

thanks
Dan

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Old 12-30-2010, 03:52 AM   #2
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Keeping the bad stuff out and preventing evaporation. I have no idea on the malt liquor think. Try to stay away from the Colt 45.

Jason

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Old 12-30-2010, 04:01 AM   #3
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haha thanks for the reply Jason.

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Old 12-30-2010, 04:04 AM   #4
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Since air is moving all the time if you open ferment you're going to introduce oxygen to the beer. I have no idea how much or what difference it will make in the final product, but that's one of the main reasons.

n/m about malta, my brain was malfunctioning.

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Old 12-30-2010, 04:14 AM   #5
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Quote:
Originally Posted by fishermand715 View Post
I know that it is for keeping germs and what not out of the brew but is their more?
Pressure, believe it or not is good for beer up to 15 psi. There are brewers that actually pressure ferment. This is yet another favorable reason to use a blow off tube instead of an airlock (more back pressure), but you need a good seal.

There are also brewers that do "open fermentation" so it is not all that critical. What is critical is the environment the beer is brewed in. I would recommend trying to get a decent seal if possible.

As for malt liquor... hopless beer you say? I will guess it is made by BMC...


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Old 12-30-2010, 04:24 AM   #6
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Seriously? The delta between an air lock and blow off is negligible.

Jason

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Old 12-30-2010, 01:30 PM   #7
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There is not more to it. You could simply place the lid on top and due to the fermentation giving off CO2(which is heavier than air) it'll create a safety blanket on top of your beer. Some beers are fermented this way and I believe this is the traditional way English beers are made.

I know SN Bigfoot is fermented open but they can do it in a controlled room to help keep it clean. If you have a clean area that you can keep your fermenters then there is no harm in keeping them open.

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Old 12-30-2010, 01:41 PM   #8
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The so-called CO2 blanket is part of it, but there is also the positive pressure of fermentation....gas is constantly flowing from out of the fermenter, which keeps airborne beer-spoiling bacteria from being pulled in.

To answer the OP question, a tight fitting fermenter lid really isn't required; I think it makes people feel better more than anything.

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Old 12-30-2010, 02:02 PM   #9
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Quote:
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Seriously? The delta between an air lock and blow off is negligible.
huh? I have and now do leave the blow off tube on for all of fermentation. The end result is more CO2 in solution. The beer actually comes out with a slight "fizz" in it...at least in the hydro sample anyways!

I do not think there is a huge difference just a slight one. I am convinced that the difference between good beer and GREAT beer are hundreds of these subtle differences that all add up into the end product.

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Old 12-30-2010, 02:53 PM   #10
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To each their own! That is the coolest part about this stuff......everyone comes up with their own little things.

Jason

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