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

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What can have caused my mead to have the taste of yeast?

I brew my first mead one month ago. I've put 1 dose of honey for about 3.5 of water. Ended up with a 2 liters of must in a pet bottle. I've put 10 grams of yeast (the entire sachet). Since i started, ...
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321 views

How long does a white labs liquid yeast vial last once opened?

I have been using half of a vial of white labs liquid yeast for brewing 1 gallon batches of beer. How long will the second half last once I put it back in the frige? It had been allowed to warm ...
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224 views

Yeast nutrients

I've seen several beer, mead, and wine recipes that call for yeast nutrients. I'm even now following a mead recipe that calls for staggered nutrients. But my question is, what exactly are yeast ...
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138 views

Tannins and yeast

On this page it is claimed that wine yeast needs some tannins to work, and that this can be a cause of stuck ferments in, say, flower wines. I have never heard of this, and cannot seem to find a good ...
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websites that describe yeast flavors?

changing the yeast is the easiest way to experiment with a recipe. I have my first brew about a week away from bottling. so what's next? there are a ton of websites out there, and I could use a good ...
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Starter quantity w/ Mr. Malty Calculator

I have an imperial stout that seems to have slowed fermentation ~ 1.040. I made a 2L starter w/ Super San Diego yeast on stir plate and pitched it at high krausen.. no decanting. Based on Mr. Malty's ...
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410 views

Over-pitched yeast- how to avoid autolysis?

I am doing my first batch with a yeast starter. I harvested yeast from a commercial Belgian trappist ale, built it up for a couple of days, cold-crashed it, decanted off the majority of the mini-wort ...
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Not seeing fermentation on lager's primary fermentation

We're currently trying to get a lager to go through its primary fermentation but after 2 days, we haven't seen any action or changes on the surface of the wort. The wort had a full packet of yeast ...
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Fermentation Done After 2 Days?

So this is a weird one. 3 weeks ago I made an Xmas beer. I brewed it, pitched the #2 yeast, and put the carboy in my cold dark room (about 70 F) to ferment. The fermentation and krausen began about ...
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Homebrew sitting on top of washing machine - agitation

My fermentation bucket is on top of my washing machine, when it spins it vibrates the brew. I've been careful to clamp it to the back of the washing machine with a bungee otherwise it might shake ...
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171 views

When will fermentation end? ( wine )

I made 10 litres of red wine ( pasteurized grape juice from the supermarket ), added 2kg sugar, used yeast bought from my local homebrew shop. Fermentation started after a day, and for the first two ...
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Stuck fermentation - how long to leave it for?

Porter, sitting at a steady 22 degrees, should be 5.2% abv, fermentation stopped at 2.5% A stir took it to 3.5% over a week. Added yeast, and nutrient, no sign of further fermentation 2 days on. ...
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291 views

First homebrew batch very sweet

I recently made my first home brew batch using an off the shelf starter kit (English brown ale). The beer is much sweeter than I was expecting and the alcohol content is ~3-3.5% (should be 4.5%). Am ...
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398 views

Yeast Starter Benefits

What exactly are the benefits and just how significant are they of making a yeast starter as opposed to throwing in the yeast as per most beer kit instructions?
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332 views

Basic yeast questions

I've been researching online for months now in preparation for my first brew but there are still questions to which I can find no answers. Is yeast either dead or alive, i.e. works 100% or not at ...
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609 views

Slow Fermentation in cider

Two weeks ago I started 2 gallons of hard cider from windfalls - washed and bruises cut out. I pasteurized my own apple juice, kept it below boil. No preservatives. Everything was santitized with ...
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Best yeast for Mead

I have been making mead for close to 5 years now. I do my mead a little different than most. I use Safale US-05 dry ale yeast. I let it ferment for 3 weeks then I transfer out of the fermenting ...
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What yeast is in White Labs WLP080 Cream Ale Blend?

Has anyone used the Cream Ale blend from WhiteLabs? I used it recently and am surprised at the lack of flocculation. The beer has been in a cold keg for a month and its still fairly cloudy. Was ...
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anyone know where good tutorials are for starting to brew lager

I am currently brewing my own beer and its going good. For my next batch I want to make something like a Coors Light or even something that tastes like Fosters or Carlsberg. If anyone could help it ...
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Why were we able to make alcohol with little cleanliness and no sanitizer? [closed]

When I was younger I lived in Missouri for a bit and I met a guy who ended up having me help him make "shine" (that's what he called it) in the woods fairly often - I guess you could say that I was ...
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67 views

No pressure in secondary

I have a problem with an ale kit I've brewed and kegged. I have done primary with a s04 yeast and its been in secondary for about 5 days and I've checked it this morning and its not built up pressure. ...
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151 views

What is the smell from growing beer yeast and is there any adverse effects from the odor/fumes

What are the fumes from growing beer yeast and is there any adverse toxic problems?
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322 views

Making Hard Cider in a Dorm

So I am attempting to make my own hard cider. At my school, there is a farmers market every Thursday and at this market they sell flash pasteurized cider; the process is stopped partway through so it ...
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440 views

How does the attenuation limit from mash temperature affect yeast attenuation?

Like, for example, if you select a yeast with an average attenuation of 80%, but you mash at 160, which limits attenuation to 76.8%1, would the limit simply be the lower of the limit or the average ...
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Can you help me read this complex Yeast recipe? (Sour Beer help)

I'm reading a recipe for a Sanctification clone, which is one of Russian Rivers Blonde Sour Ales. The recipe for the yeast read as such Brettanomyces bruxellensis culture, Wyeast 3112 or White Labs ...
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Brewing with Saccharomyces boulardii

I have a friend who studies some molecular aspects of probiotic yeasts, some wild ones and also the widespread in medications Saccharomyces boulardii (found in Florastor®, Floratil®, and other ...
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did i put too much yeast in?

this is the beer i made ingredients: 17 litres spring water 1 can of coopers Australian pale ale i think it was 1.7 kg normal size 500 grams malt extract coopers brew enhancer 1 which is 250 grams ...
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Pure Carapils starter wort?

I was reading White Labs' Homebrew Starter Tips page, and the following got me thinking: Keeping the Original Gravity low is important because you want to keep the yeast in its growth phase, ...
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Why does WLP002 sometimes attenuate more?

So I am brewing lots of bitters using WLP002. Typically, I mash a grist with around 10-15% specialty malts at 66 C and ferment at 20 C. (I use BIAB and dunk sparging.) The typical situation is that ...
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Is it okay to freeze dry yeast at around -20 °C?

After adding a sachet of 71B yeast to a 50ml starter at about 40 °C, I've noticed absolutely no activity. The yeast sunk to the bottom of the container and just stayed there. This is the first time I ...
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Should I pitch a second round of yeast?

I brewed a Dogfish Punkn clone that was rather heavy on the sediment. I pitched a pretty healthy yeast starter that was working for 30 hours before being pitched probably around 80 degrees, perhaps ...
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256 views

Why toss the starter wort?

I've wondered about this for a while: most 'how to make a yeast starter' instructions I've seen suggest using only the yeast-rich sludge, and tossing most of the starter medium. This makes sense if ...
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558 views

First time brewing lager, no fermentation

I set up a new fermentation chamber and was keen to try my hand at a lager. Unfortunately now 5 days on there hasn't been any fermentation so I think I may have shocked the yeast with the cold or just ...
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Would Yeast survive the temperatures of distillation and properly carbonate?

Theoretically: If one were to distill a beer at 172.3-211.9*F with the intention of throwing away the distillate, in order to produce non-(or low-)alcoholic beer, would the remaining beer contain ...
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Too little sugar?

It's my first time making cider and I believe I didn't put enough sugar in it. I put 1 1/2 brown sugar (Even though some fell off to the side cause I didn't dissolve it, like the twit I am). I would ...
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117 views

Will a yeast that ferments at higher temps stop fusels?

I have trouble with controlling temps and do not have much room for my growing collection of fermentation bins but I'm trying the swamp cooler for my 5L DemiJohn white wine kit. I'm gonna get some new ...
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Are Yeast Nutrients actually necessary for brewing Beer?

I typically bought Yeast Nutrients from Northern Brewer for my yeast starters and extracts. I went to my LHBS today to purchase some DME for an extract and asked for nutrients for the beers that I ...
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Selecting yeasts

As I understand it, the selection of malt (and adjunct), hops and yeast all affect the flavour of a beer in important ways. However, while you can taste the malt and other grains to get a feel for ...
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Wyeast Smack Pack did not inflate

I ordered four extracts from NB and received four Wyeast liquid yeast smack packs. There website specifically recommended against purchasing liquid yeast from them during the summer but I did so ...
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2 yeast starts with one stir plate

I am planning on brewing 2 beers this weekend. I want to make starters for both of them but I only have 1 stir plate. I do have 2 Erlenmeyer flasks. How would be the best way to go about making both ...
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229 views

Gross layer of foam at the end of fermentation and aging

I experienced few times a gross layer of foam when fermentation finishes. But the beer was fine, no symptoms of contamination neither off-flavors. I never measure the depth of foam but it can have ...
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Halving my yeast for two batches

I am about to start a batch again, as I have now run out of beer. I am brewing in smaller batches (8 litres). I plan on splitting the wort and putting then into two separate fermenters. Since a ...
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Buying Yeast Online and Temperature during Transit

I buy everything from Northern Brewer and it takes UPS 5 days to ship to me (If I'm not home early enough from work on Friday, I have to wait the weekend too). Next week is going to have three days ...
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133 views

Yeast overdose?

So I'm new to the home-brewing scene, and I was a bit too excited to get started with my apple cider. I misread the instructions, and instead of using half a teaspoon for a 2lt bottle of juice.. I ...
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What type of Yeast can withstand high gravity beers?

I would like to make a higher gravity beer, an Amber specifically. With the yeast (Dry Yeast - Safale S-04) I currently use, I get stuck at about 5.8% ABV (SG 1.074, current gravity 1.030). Do I need ...
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Violent fermentation | One day after brewing | Liter spillage from the top

I am an amateur brewer just cooked my third batch ever three days ago. This time with a couple of friends (which also bought the ingredients from a place I haven't before), so this time I used a ...
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Does current science have any idea of what components of the biology of yeast make which desired characteristics of beer

http://www.theguardian.com/science/2014/mar/27/designer-chromosome-brewers-yeast-eukaryotic-saccharomyces-cerevisiae If you haven't heard of this story you have GOT to read it. "Scientists ...
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When saving or recovering yeast is it always found in the cake or trub or lees, or is it sometimes found in the krausen?

I have read various things about saving yeast when racking, which is what I intend to do soon with one small batch of cider. I see some people just "take the cake" and I've read about a process ...
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Will blending a highly attenuating yeast with a highly alcohol tolerant yeast cleanly lower the final gravity in a very high gravity ale?

I've brewed some ridiculous beers in the past, my highest original gravity resulting in over a final 18% ABV using WLP099 yeast. That particular beer turned out well for how inexperienced I was when ...
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Bottle conditioning

More reading - this time about bottle conditioning. If my yeast attenuation level is say 80%, does that mean there would be enough sugars in the bottle for the yeast to carb the beer? Or would priming ...