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

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Which is a better fermentation method for high gravity beers?

I'm looking to brew a high gravity porter for christmas this year, aiming for OG 1.100. I've browsed several questions on this site relating to high gravity beers and the tendency seems to be towards ...
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67 views

Fast Fermentation - Should I be worried?

Just did my first batch using the fast ferment conical fermenter. Brewed an extract kit from Northern Brewer....their Smashing Pumpkin Ale. It's a 1.054 OG brew and I used a dry yeast to ferment. ...
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Yeast plate not showing single colonies

Why do my yeast plates end up looking like this? And not this? My yeast plate is composed of wort + agar.
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58 views

Maximizing fruitiness from WLP002

I am looking to reproduce an incredible fruity aroma and flavour from a recipe I made a year ago. Looking at the recipe I am guessing it may be from the yeast. 3lb 2row 1lb Rye .13oz nugget @ 60 min ...
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Krausening / Pitching Actively-Fermenting Wort

I heard on one of the old Jamil shows that pitching actively-fermenting starter is a good way to get noticeable but subtle yeast character in a beer. You need to start with an adequate amount of ...
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Homebrewing Soda, Safety Concerns

I wanted to try making my own soda this summer, and finally got around to it 10 days ago. Here's the thing. I didn't have/use any specialized equipment. I boiled water with sugar ~15 minutes, and ...
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47 views

Preparing yeast for secondary fermentation

I have a barleywine in progress that seems to have stalled around 9% ABV with some residual sweetness I'd like to try and reduce. After 2.5 weeks in primary all activity had stopped so I racked off ...
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Yeast Problems!

Brewing a porter, pitched my yeast and started with a 1.056. My air conditioner broke for 1 day and the beer got to about 80 degrees after about 1 1/2 weeks of fermentation. Beer has been sitting at ...
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Worried about extent of inflation of Wyeast 4766 package

My friend and I were trying to ferment some raspberries using the WYEAST 4766 Cider yeast. Now it's 1 day after we activated the package and it is still only partially inflated. Should we buy a new ...
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59 views

Kegging - Is it necessary to filter yeast?

I'm planning to buy kegging equipment and keg my next batch of beer, and I ran into some yeast filters for sale that remove yeast specifically for kegging. Is this a necessary step? I know that when I ...
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Coud I ferment a five gallon batch on top of the yeast cake from a finished one gallon batch?

Title says it all: Could I ferment a five gallon batch on top of the yeast cake from a finished one gallon batch?
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If oxygen is important mostly during the lag phase why not pre-oxygenate the yeast pitch prior to inoculation?

I feel that this question could potentially have more specific and direct sub questions but for now I would like to simply pose it as "why not oxygenate active yeast prior to pitching instead of ...
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Is my frozen yeast okay?

So I harvested my yeast for the first time (WLP566 Saison II), but I left the fridge temp mega low by mistake and it froze overnight. I have immediately thawed it out, but I am wondering if it now ...
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Why should I make a starter? [duplicate]

Why should I make a yeast starter and not just sprinkle the yeast on top of the wort like the packet says? I am sure there must be some good reason why you would do this.
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58 views

Is this a pediococcus infection?

A berliner weisse we forgot to bottle for around a month and a half. Did not introduce pediococcus or lactic acid in the fermentation. Did a sour mash before the boil so lactobacillus shouldn't have ...
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41 views

What is the approximate batch size/OG limit for US-05 11g packet? Have I used enough?

I've started a brew with an OG of 1.065 in a 23L batch. I pitched a rehydrated 11g pack of US-05 and after 5 days I took a FG reading when I observed no bubbles after some time; it came out at 1.028 - ...
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137 views

Is oxygenating after brew day okay?

If you don't oxygenate on brew day, is it too late or can you oxygenate late? If so, are there limits?
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Lightening of Cider

My peach-apple oxidized a bit as I was juicing and started fermentation amber-brown. Over two days of rapid fermentation with Safale US-O5 dry ale yeast, the color lightened to a pale yellow, straw ...
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How to fix yeast smell in young wine from kit

I started my first attempt at fermenting this wine kit in mid-April. I followed the initial directions pretty meticulously which included stirring in the fermentation bucket daily (due to kit ...
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50 views

Handling dried yeast

I'm brewing a coopers ginger beer kit but over the past week the yeast didn't seem to activate particularly well. There has been no krausen and over the past couple of days there have been a few ...
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55 views

Does yeast type affect wine taste..?

I'm new in wine making and I tried to make it with fresh yeast, not dried. I think I'm using a lot of it to help fermentation end faster. Will this affect the taste of wine? Will dries yeast achieve a ...
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51 views

Heating after fermentation?

What's the general consensus on leaving a heat source turned on after fermentation has complete? I'm doing an Imperial IPA which should finish fermenting in 4-5 days going by previous experience with ...
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58 views

How will this beer turn out?

I brewed my first all grain beer on Sunday; everything went well barring one leaky tap and a slight blockage on the tap in my kettle due to a poor hop filter. It is supposed be an IPA style beer using ...
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46 views

What is the specific role of yeast in wine making? [closed]

I'm a senior student, experimenting on alcohol concentration of wine using different variables. My variables are white wine yeast and brewing yeast and whilst I know the main role, I would like to ...
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Yeast not viable?

If I think my liquid yeast was not viable yet pitched it unknowingly and now no fermentation happening-can I introduce new yeast or trash the batch ?
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Culturing Yeast and Bacteria from Pulque

I'm interested in making pulque, and was wondering how to go about culturing the yeast and bacteria necessary for making it from an existing batch. Is this at all dangerous? I know doing this with ...
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143 views

Can I add hops and sugar to fermenting beer?

just would like to know if its possible to brew a beer over multiple weeks.I was thinking of brewing my next beer by adding a different hop every week for 3-4 weeks.And at each time adding more sugar ...
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Is autolysis a problem when reusing yeast?

I've seen around here and in other sources that for homebrewers a secondary fermentation (concerning autolysis) isn't necessary, unless you're going to dry hoppy or something like that. My question is ...
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155 views

Fermentis S04 vs.S05

I am trying dried yeast for the first time. I did up 100 litres of English IPA yesterday and I pitched 2xS04 into 50 litres and 2xSO5 into 50 litres. Anybody want to hazard a guess at the ...
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57 views

Optimum Fermentation Temperature

I am planning on brewing a wheat beer with Danstar Munich Wheat Beer Dry Yeast. I didn't realize until I had already made the purchase that the optimum temperature for fermentation was 55-65. I don't ...
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33 views

What yeast for carbonating a lager?

We brewed a Dark Lager using Wyeast 2007. It fermented for two weeks and has been lagering for 3. When we bottle, we think we'll need to repitch to ensure the bottles carbonate. Thoughts on what ...
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108 views

Which is better: old yeast from the primary fermentation or reused yeast from primary fermentation?

It's known that reuse yeast from early stages is better. But during the fermentation the reused yeast multiplies itself, producing newer cells. Said that, I'd like to know if it's better to use yeast ...
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143 views

Wine fermentation without yeast?

Apologies if this is a duplicate - wasn't able to find anything similar. Making a 3gal batch of strawberry wine. Poured sugar-water over fruit and set aside to cool. Been having problems with bugs ...
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How can I get more consistent carbonation in bottles?

Some of my bottles usually turn out over carbonated, and some turn out under carbonated. Is there a good technique to get consistent carbonation? I imagine it is a function of both evenly distributed ...
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Why doesn't the Brulosopher Quick Lager Method produce esters and other off flavors?

I'm brewing 6 lagers right now (all Wyeast 2206) according to the Brülosopher Fast Lager Method. Essentially, it involves fermenting at normal lager fermentation temperatures until it is 50% ...
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Any way to Flavour a Cider crafted with Baking yeast? [duplicate]

I'm very new to brewing, and I'm making a couple test batches of cider as we speak. However my accessibility to things like wine or champagne yeast, so i'm stuck with baking yeast. My question is ...
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putting the fizz back into beer

I'm hopping you guys can help me with this one. I want to fill a 2lt coke bottle with beer from bottles and add sugar and yeast to put the CO2 back in so it will last 8 to 10 days plus. I'm after ...
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Closed environment vs open environment in brewing

One thing that is very confusing for me right now is the dynamics of when to isolate the contents and when to aerate it. Like as soon as you finish boiling it's recommended to put a lot of oxygen by ...
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Does a different cell count invalidate a tasting expeeriment between two batches, or is it immaterial?

Now that I'm all grain I've done many experiments regarding differences in grains, trying to make 2 batches identical in every way except for one variable with the grain. However I just learned via ...
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111 views

Should yeast be washed or just stored in the beer?

The answer to this question suggests yeast shouldn't be washed, is that really the current consensus? what if I'm brewing a different style? Won't the trub affect taste? Lots of hop residue there. ...
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100 views

How much recycled yeast to use?

Morning all, I am just getting into re-using my yeast and have a question. I wash it as per the YouTube advice that I found (haha) and it seems to store pretty well so far. I have tried it in one ...
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wlp565 minimum time to bottle condition?

I'm fully prepped for wlp565 to stall out, but this question is about bottle conditioning with wlp565. what have been your minimum conditioning times to hit your desired CO2 level using wlp565? ...
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160 views

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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191 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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99 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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84 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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224 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 ...