Yeasts are micro-organisms used in brewing to produce alcohol during the process of fermentation.

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How does a beginner manage their yeast farm?

I'm about 6 batches into my AG brewing and my fridge is slowly getting filled with jars of yeast I've been harvesting, each labelled so I can tell which batch they came from. So far I've been ...
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117 views

When do Yeast grow and multiply?

Do yeast multiply in the initial aerobic phase or do they continue to multiply all the way through the entire anaerobic phase?
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I stirred the yeast and it said do not

Making a British Barley wine and the dry yeast instruction called for sprinkling the yeast on top of the starter. I was a bit over excited and stirred at some point after it reached room temp but ...
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124 views

Longer time on yeast for a bigger beer?

I ferment all my beers single stage in a glass carboy immersed in a water bath to maintain temperature. This is the first time I've made a bigger beer (this one started at 1.080) on this system. I ...
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57 views

What are Esters?

I am reading a lot about yeast cell production and ester production. I think I have a good handle on the yeast cell production, but what are esters? Is that part of what the yeast consume that give ...
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126 views

Using Campden in water

I am using campden in water to remove chlorine and chloramine. I have heard that it may inhibit the yeast. Should I leave it any length of time after use in order to minimise yeast inhibition?
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136 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 ...
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529 views

Waited 6 Days after boil to pitch yeast, Wort had what looked like mold, what can be done?

Like the title says, after I chilled my wort I realized the kit I ordered did not come with yeast, an error on the packers fault. Because of my work schedule I wasn't able to pitch the yeast for about ...
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133 views

Liquid yeast, do need to make a starter?

I'm making mini batches with IPAs(4-5 liters/ca 1,5 gallon), and with my three first brews I've used dry yeast. On my next mini batch I'll use liquid yeast(WLP005), do I need to make a starter or is ...
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Yeast cake and Septic tank

I just transferred my brew to the secondary fermenter (yes, it's not necessary, but I want to help clarify the brew). Where we live, we have a septic tank sewer. I was just wondering if there could be ...
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Yeast too stressed for bottling?

I brewed a pumpkin ale and added extra fermentables. After primary and secondary was done, I went to bottle. While bottling I tried some and noticed the alcohol level was quite high. After two ...
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identifying sediment layers in yeast washing

I'm washing the yeast from a brew I've just bottled and it's not settling quite how I am expecting with my limited (once before) experience. This fermentation was with a fresh packet of dried Danstar ...
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Is my fermentation on the right track?

I upgraded my equipment and estimated my new efficiency a bit too low, so the imperial IPA that I brewed on 11/30 ended up having an O.G. of 1.10 (supposed to be 1.09). I made a two step starter with ...
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375 views

Yeast attenuation and fermentable sugars

I'm a little confused about this and can't find an answer that satisfies my curiosity... I've found a helpful thread (What does high attentuation actually mean in terms of types of sugar fermented?) ...
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146 views

Is fermentation 'done' even without there being cake?

This one has me questioning what I thought I knew. Brewed a "mocha stout" 4 days ago: Steeped: - .5lb chocolate malt - .375lb roasted barley For boil, added: - 6lb DME (dark) - 1lb lactose At ...
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3answers
302 views

Do I need to double the yeast when splitting the batch into two fermenters?

I am brewing 5 gallon batches. I end up with 5.5 gallons after the boil so I split the batch evenly into two(2) Corney kegs fitted with an air lock on each gas in. I ferment in the two kegs and then ...
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104 views

Can I buy White Labs “Platinum Strains” yeasts in their seasonal availability window every year?

I am looking at the White Labs WLP076 (Old Sonoma Ale), and see that it is available May-June. My LHBS, which also happens to be a natl. mail order shop, does not have it available. I see some online ...
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1answer
642 views

Pitching Whole Starter vs Cold Crashing Effects on Taste

Earlier, I made a thread trying to find a reason for a yeast/green apple flavor in my beer.. After a lot of thought and poking around, I have an idea of why this is, but I wanted your opinions on ...
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728 views

Using two kit cans should I use both yeast packets and how much sugar

I have seen some people online using two kits to make one 23L batch of beer with more flavor than a single kit. If you use one kit to make 23L you add the yeast supplied with it and 1kg of dextrose ...
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Yeast starter with YM-Medium under aerob conditions?

As far as I know the most common yeast starters are malt extracts which are sealed with an airlock. But the few times I worked with yeasts in the lab we used YM-Medium (Yeast extract-Malt extract) to ...
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1answer
213 views

What are the characteristics of baker yeast?

I am looking to brew some ginger beer and other simple stuff. I wonder what are the characteristics of baker yeast? Will they do for a cyder beer ? What are the disadvantages? In Europe we have ...
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2answers
177 views

Yeast comparison source

Is there a good source that compares the commercially available yeast strains from the most common sources like White Labs and Wyeast? I am thinking of something with homebrewing experience built ...
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356 views

Scaling recipe ingredients to smaller batches? How do AAUs scale?

I plan on brewing 1 gallon batches. The problem is that most recipes are for 5 gallon batches. The scaling seems obvious: divide the amount of each ingredient by 5. With this in mind, a few ...
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Adding the yeast to a beer kit by sprinkling or stirring

When making a beer kit some people say to sprinkle the yeast on top of the wort and other people say to stir in the yeast to incorporate it into the wort. I know that there is the other method of ...
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ReaLemon's preservatives

I'm trying a simple recipe for ginger beer (Method 1 here). Would using ReaLemon be ok instead of an actual lemon? I understand that preservatives in an apple juice can harm the yeast when making ...