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Questions tagged [aeration]

Introducing air into the wort to increase the amount of dissolved oxygen.

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2
votes
2answers
144 views

Is aerobic fermentation in beer brewing a myth?

The more I read about yeast and fermentation, the more conflicting, confusing (and possibly incorrect) statements I come across. I have read in several bits of literature that yeast requires oxygen ...
4
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3answers
572 views

Lallemand says their dry yeast does not require aerated wort. Should I aerate anyway?

The specs for Lallemand BRY-97 dry yeast explain that aeration of the wort is not necessary. I've had good results following their instructions precisely, but I wonder if I'm missing out. I wonder if ...
3
votes
2answers
178 views

When to oxygenate when you delay pitching the yeast?

It's time for some summer brewing and that means the warm tap water running through my wort chiller will have trouble cooling my wort down below the upper 70s. Even for the Belgian style beer I'm ...
2
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1answer
34 views

Hooking a Tetra 77848 to an air stone

I purchased a Tetra 77848 and some standard 1/4" ID tubing to aerate my wort. However, there's an issue with the tubing hooking up to the output on the tetra, it's too narrow for the 1/4" tubing. I ...
2
votes
2answers
46 views

Pitching/aerating stacked batches

I have been "stacking" batches and have attenuation issues. I will brew 5 G today and pitch the yeast. I repeat these steps tomorrow and add it to the top of the first batch, although I do not pitch ...
3
votes
1answer
99 views

GCB Materials on Cold Wort Aeration

Currently studying for the General Certificate in Brewing from the IBD. The section on wort oxygenation/aeration states that a disadvantage of in-line cold wort aeration is the need to increase ...
2
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3answers
237 views

Best time to transport wort in a car

I'm planning on brewing my first batch of beer soon, but I will have to do the cooking part at my parents house, which is an hour drive away, and then ferment the beer at my apartment. At what stage ...
1
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2answers
356 views

Aerating no chill corny keg fermentors that don't seal

I'm very interested in ferment in corny-kegs after reading some questions about that here on this stackexchange. I will try it next batch, but there is a question about aeration/no chilling method: ...
0
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1answer
778 views

Aerating wort with an air pump. What's the proper gallon rating?

I'd like to aerate three gallons of wort using my aquarium pump and 2 micron stone. The pump is rated for 10 gallon tanks. Is this sufficient?
1
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1answer
102 views

Can I re-aerate in the Primary?

Is there a downside to shaking the primary fermenter to re-suspend the yeast if the fermentation is going slowly?
1
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3answers
4k views

Why use Oxygen tanks to aerate wort, what are the benefits?

Do you notice any benefits in flavour or yeast activity over a regular air pump? By not blowing dirty air through your wort, could it keep down infections/contamination? Does pumping regular air ...
0
votes
1answer
691 views

May I Aerate AFTER Pouring Yeast into the Carboy?

I extract brew, and the kits I buy from NB tell me to add cold water to the wort to get a total of 5 gallons, and then aerate before adding the yeast. However, if I do this I will always have more ...
1
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1answer
2k views

What is the proper way to supplement a yeast starter with oxygen via an aeration stone?

I have two yeast starters going on my two homemade stir plates. The stir bar or the stir plate for one of them is malfunctioning and I can not increase the speed enough to get a vortex going. It is ...
1
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1answer
870 views

Yeast Starter Vortex Size

I've read online that the size of the vortex in a yeast starter does not matter. Why is this true? When I was experimenting with water yesterday, I created a monster vortex (very cool) and could see ...
4
votes
1answer
294 views

When is aeration good and/or bad in homebrewing?

I had thought that the point of using a siphon when moving wort/beer is to prevent agitation and aeration and a ruined beer. So we use the siphon when moving cooled wort to the carboy for fermentation,...
13
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2answers
10k views

What are the primary causes of Acetaldehyde?

I'm a bit confused about this. In my own experience, I'm no longer experiencing acetaldehyde flavours in my beer after improving my aeration methods and at the same time starting to use yeast ...
1
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3answers
4k views

Can Dried yeast function at a low temperature?

I started my first batch of home brew lager around 24hrs ago I aerarted it and it was at 20 Degrees celcius but does not appear to be fermenting..... I know people say I have to give it time as I read ...
2
votes
1answer
852 views

Aerating bottled apple juice for cider

I understand that disolved oxygen is good for yeast, and aeration is done near the time of pitching in beer making. Does this rule hold true for bottled apple juice as it does for wort? Would apple ...
5
votes
2answers
309 views

oxygen and yeast pitching rates

Many online references, such as BYO, mention that oxygen is needed by yeast to reproduce, and that a wort with low dissolved oxygen levels will have longer lag times and less attenuation. This might ...
8
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4answers
4k views

Aerating When Moving from Mash tun to Boil Pot

When transferring from the mash tun to the brew pot, I had set the mash tun about 3 feet above the brew pot and let the wort flow out and fall to the pot. This caused a large amount of bubbles that ...
1
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3answers
20k views

Fermentation started, then stopped the next day. Is my yeast dead?

This is my first shot at homebrewing, using Northern Brewer's American Wheat Beer kit which is based on liquid malt extract, Willamette and Cascade hops, and a packet of dry yeast. I brewed and put ...
5
votes
3answers
1k views

Can I aerate again before bottling?

I have a Dunkelweizen from a Northern Brewer all-grain kit that I brewed and pitched 2 weeks ago. I have one problem, I forgot to aerate before I pitched the yeast. I'm concerned that the yeast will ...
3
votes
1answer
748 views

What are the best practices for using a wine degasser to aerate wort for beer?

I have a wine degasser, which is a bit like an egg-beater for a power drill. It aerates wort extremely well but I don't have a good rule of thumb for how to tell when enough is enough. Should I: ...
4
votes
1answer
149 views

Are there any particular steps to fixing a batch of beer with extra trub / hot-break, or should it settle (as best as possible) on its own?

I made a silly mistake using a wine degasser to aerate my wort. After cooling the wort I aerated in the brew-kettle, with trub/hot-break still present, rather than racking to a carboy before aerating....
5
votes
2answers
436 views

Should Priming Sugar Solution Have Minimal Oxygen?

When I bottle, I follow the typical step of boiling some water, adding bottling sugar, letting it cool, and adding it to the beer that's done fermenting (but still of course has live yeast floating ...
4
votes
1answer
230 views

Long cooling before pitching — aerate now or later?

This is a follow-up to this question: Long cooling before pitching -- read that for background. I aerate to add oxygen to my wort by pouring back and forth between buckets. If I wait before pitching,...
3
votes
1answer
438 views

How to reduce head when aerating wort with an aquarium pump

Last night I embarked on a fun adventure to create a 14-16% ABV beer (Dema Goddess Ale), and it calls for aeration via an air pump that you would typically use in an aquarium. Due to the high ...
7
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2answers
1k views

How to measure wort oxygenation

As a follow-up to a couple of other questions: How to Properly Oxygenate Wort Wort aeration on a budget How do you measure oxygenation of wort? What methods are available for a beginner brewer (low-...
11
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5answers
2k views

Is it necessary to aerate wort when pitching onto an existing yeast cake?

To my knowledge, aeration provides oxygen so that the yeast can reproduce before fermentation. If you're pitching onto an existing yeast cake, there should theoretically be enough yeast already to ...
20
votes
4answers
11k views

How to Properly Oxygenate Wort

How much oxygen do I need to put into my wort? I've heard that homebrewers need to aerate with an oxygen stone and either aquarium pumps or oxygen. Is this true, or is shaking my carboy enough to ...
8
votes
6answers
3k views

Wort aeration on a budget

To aerate my wort I have been using a whisk, but i am worried about contamination. What are other more effective ways to aerate wort without spending too much money?
3
votes
1answer
177 views

Is trapped air in a counterflow chiller really an aeration risk?

I recently bought a Blichmann Therminator counterflow chiller (I know, extravagant, but it is the awesome). The instructions say to operate it with the hot wort input facing down, so that gravity ...
11
votes
3answers
420 views

Is aeration necessary if you overpitch?

We all know that aeration is necessary for yeast growth. Does it facilitate more than that? If you massively overpitch, on a previous yeast-cake for example, do you need the same amount of dissolved ...