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

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How much fermentis/safale US-05 yeast to use?

I wondered if anyone who has used the above yeast can give me an idea on the quantity required. I am brewing a fairly high SG IPA (somewhere in the region of 1.065-1.080) batch size 15-20L. Brewers ...
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4answers
61 views

Brewing - forgot to stir in yeast

I added the yeast to my fermentation bucket and closed it up without stirring. Remembered about 8 hrs later; opened bucket, lots of yeast floating on top, stirred it up good and closed it. Have I ...
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5answers
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Minimal airlock activity

So I've just finished my 3rd all grain brew yesterday, first time trying a stout. After 24 hours, I'm only getting ~4 bubbles per minute on the airlock. Last night about 8 hours after pitching the ...
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2answers
26 views

How long can I keep a slant/plate in a domestic fridge/freezer?

I am considering plating up some yeast/isolating cultures and starting my own small yeast bank, I know that If I were to keep these at -80C in a lab freezer they would keep for years, but how long ...
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2answers
42 views

What would be a good dry yeast equivalent to Wyeast 3787?

I'm looking to produce high gravity strong Trappist like beer. Wyeast 3787 seems to be a good choice, but I'm looking for a dry yeast alternative. Suggestions? I'll make a starter before pitching if ...
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3answers
25 views

What is the longevity of dried belle saison yeast at room temperature?

I am starting to brew beer and when I bought my kit the yeast was stored in a fridge and I forgot to put in my fridge when I got home. It is dried "belle saison" yeast and was at room temperature for ...
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1answer
48 views

Not quite at FG with an extract batch after two and a half weeks… Safe to bottle?

It's a simple US-05 extract batch. OG was 1.063 and I'm currently on 1.016 where projected FG was 1.012. Gravity has been stable for three days. It's also absolutely delicious so I'd gladly bottle it ...
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3answers
56 views

My yeast won't ferment

I washed my fermenter out in meta bisulphate I then added a quarter teaspoon of bentonite followed by 12 litres of apple juice. My SG was 1060. I added 2lb of sugar for a stronger brew, SG then 1085. ...
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6answers
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Does yeast choice matter as much in ginger beer?

I'm about to brew a ginger beer and was wondering if the choice of yeast is as important in a ginger beer, where the ginger dominates the flavour. I've got the yeast-under-the-cap packet and a US-05 ...
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1answer
386 views

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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4answers
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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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1answer
116 views

Possible wild yeast contamination?

In May I brewed the following beer: 81% Pale 2 row malt 16% Brown malt 3% Black malt Single step mash at 73C. With 290g of hops for a total of 103 IBUs. The OG was 1.077 and it went into primary ...
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3answers
76 views

How much does oxygen exposure to wort affect yeast being aerobic or anaerobic?

To the best of my understanding of making beer, wort must first be properly aerated to provide oxygen for the yeast to multiply when first added to the wort. After all the oxygen is consumed, the ...
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1answer
138 views

Is this pediococcus contamination('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 ...
3
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2answers
81 views

Yeast not settling or contamination?

Having trouble understanding what I'm looking at here (see pic): http://imgur.com/1OH9TQj Made an Amber ale with LME and used Wyeast 1332 Northwest Ale. Racked to secondary after 2 weeks to get ...
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1answer
28 views

How quickly will bread yeast take to create an ethanol concentration of…?

How quickly will bread yeast take to create and ethanol concentration of ~15%~,~10% and ~5%~ in at 30°C.I believe bread yeast is designed to rapidly fement(at first at least) but is not that ethanol ...
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0answers
6 views

Yeast done with Fermentation? [duplicate]

How do i know when my yeast is done with it's primary fermentation cycle. Are there physical markers and/or sighs. I am using bakers yeast just because I would like to see what it yields. There is ...
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2answers
41 views

Scaling up from a colony

I am preparing to start my own small yeast bank and I was wondering what is the optimal method for scaling up to a starter from a single colony. What step sizes should I use? What strength of wort ...
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1answer
34 views

Wyeast 3724 hot fermentation

As I'm living in Singapore I'm trying out an experimental all extract recipe consisting of pilsner malt, crystal malt and amber malt together with Wyeast 3724. I've hopped it with Centennial and ...
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2answers
66 views

What is the highest OG which is still fermentable?

How high can you push OG, taking sugar I know you can easily make a solution up to ~1180 (500g in 1 litre), but how high can a super saturated solution be? And, at what limit does it become ...
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4answers
3k views

How many times can yeast be reused?

A good yeast sample can be retrieved, stored & reused regularly across brews. Is there a limit to the number of generations a sample can last? I've heard that after so many generations a strain ...
2
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2answers
56 views

Can I overyeast by adding one pack of Wyeast for brewing 2.5 gallons

I was wondering if I add a complete pack of Wyeast to a 2.5 gallon batch rather than a 5 gallon batch what would happen. Would I "overyeast" the beer?
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2answers
74 views

No fermentation after 3 weeks

About 3 weeks ago I brewed my very first beer, a simple lager. I checked on the beer after 1 week of fermentation and now again after a bit over 3 weeks. At both times the density of the beer didn't ...
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3answers
73 views

Wine Quality Sensor

I am an engineer who's built a wine quality detector. My sensor can pick up a wide variety of chemicals at levels as low as parts per million (ppm). With no background in wine production myself, I ...
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2answers
67 views

What's the best method of storing yeast for 4 to 6 months in the refrigerator?

I've done a bit of research into different options of yeast storage and so far the least time consuming and most accessible methods seem to be: Making a slant from a yeast sample taken directly from ...
2
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1answer
62 views

Spongy, corally residues in fermentation bucket

Cracking open the fermentation bucket on bottling day revealed some sponge-coral look-a-likes floating around on the top of the brew. I have never seen this an any beer before, and other beers, based ...
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2answers
36 views

Reactivate Yeast?

First time home brew. I followed instructions and pitched yeast into wort (which looked like mud) airated it a bit, placed in my basement with a cover over it. There was a bit of activity in the ...
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2answers
43 views

Starter wort volume = BEFORE or AFTER 10-15 minute boil

Being fairly new to used starters, I'm somewhat confused as to how much volume of water to boil when adding DME to create a starter. For instance, if the Kalkulator I'm using says to start with 2 L ...
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3answers
59 views

Does lagering reduce yeast so much that bottle carbonation is effected?

My first lager (a German Pils) turned out quite good! From the keg, it's great, but the half dozen bottles I filled are completely flat!? I used a little more priming sugar per bottle than my usual ...
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5answers
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Can I use wine yeast to ferment beer?

Can I use wine yeast to ferment a beer? What sort of problems might I encounter that are unique to wine yeast trying to ferment malt sugars? What sort of flavor differences might I encounter?
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2answers
34 views

Blackberry wine yeast?

I am making a one gallon batch of blackberry wine. What type of yeast would you recommend? I would like the wine to be on the sweet side. Thanks!
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1answer
31 views

under pitched (1st) yeast-aerate into fermenter on 2nd (new) pitch or no?

I brewed an all grain stout 2 weeks ago, OG was 1.087 which was almost spot on for where I'd hoped. However, I mis-calculated the pitch rate for my starter. Racked to secondary to dry hop with mint ...
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1answer
60 views

How to Get Grape Jelly Flavor in Porter?

Brewed an All Grain Peanut Butter Porter using Pb2 and I am looking to get some grape jelly flavor in there. I used east Kent Goldings at 60, and that was it with a Belgian Ale yeast. Couldn't ...
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1answer
64 views

Under pitched lager?

I brewed an American lager, Jamil's "what most folks call beer" on Saturday 1/9. My Gravity was on target at 1.046 and I added a smack pack of Wyeast Pilsen Lager. I added it to 68 degree wort and ...
3
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3answers
57 views

Splitting a kit five ways: yeast (or other) advice?

I'm planning to split a kit five ways to do a test on different water types. The kit is a two-can 3.6Kg LME kit (St Peter's IPA made by Muntons) that's designed to make about 20 litres of beer. I ...
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2answers
45 views

Is these yeast starter calculation correct?

I’m making my first yeast starter, and want to confirm my calculations. OG = 1,059 Batch size(post boil) = 9,2 Liters Wyeast Ale yeast creating date: 07.des. 2015. (only 36-37 billions cells left..) ...
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6answers
4k views

How do I keep yeast from a strain that I've bought?

I'd like to stop buying yeast all the time, especially when I use the same strain repeatedly. This is especially a problem when it comes to seasonal strains. I'd like to brew with WLP351 Bavarian ...
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10answers
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Brewing Solid Things: Can Leftover Yeast Be Used for Bread?

I find myself baking a couple loaves of bread just about every weekend. Has anyone tried reusing their yeast from brewing for baking bread? I've heard that using some of the spent grain in bread ...
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8answers
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Is it possible to bottle condition without sediment?

I've recently been reading the labels a bit more on one of my favourite beers and have discovered that the brewers bottle condition their Pale Ale. Yet it's sold with no signs of any flocculated ...
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1answer
34 views

Best replacement for WLP545

Question: what is the best alternative to use instead of White labs yeast WLP545, in order to get the most similar result? Or is there any commercial produced beer using WLP545 that you can grew a ...
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1answer
60 views

how do sour brewers manage their local wild yeast in the air?

Can anyone describe the general process you manage the levels of wild yeast in air? I'm thinking have a maltose solution exposed and measure the change in specific gravity of it over time while ...
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0answers
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how do sour brewers measure wild yeast in the air? [duplicate]

That's pretty much my question, is there a way you can use kits/analyzing techniques to determine what types and quantities of yeast you have in your air? (before the actual brew, as in could you ...
2
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1answer
72 views

how do you add yeast during bottling stage and ensure it won't burst?

I made a delicious Oktoberfest that came out flat. The lady at AHS said to add 4 grains of champagne yeast to the bottle, since the FG was 1.042 and it tasted very sweet. She said not to let it ...
2
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1answer
65 views

My first yeast starter with a stir plate, possibly a disaster

This morning I smacked my first smack pack, and about 10 times, each time a little harder because deep depression would set in if the goodies spewed across the room. I finally got it, or so I thought. ...
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2answers
35 views

Cider with youngs wine yeast

I have made some cider from Apple juice and some mixed fruit juice to try and mimic something like a mixed fruit copperberg. I used youngs super wine yeast and no additional sugar so that the aim ...
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8answers
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Chilling wort before pitching yeast

I know it is important to chill wort to <80 before pitching yeast, and that quality of final beer is affected by the speed with which the wort was chilled to this point, and there are various ...
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1answer
41 views

Is delayed yeast activity normal?

I am working on a small batch, 1 gallon of Pale Ale. It came in a kit and the yeast was not labeled so I am not sure what kind it is. This is only the third batch I have brewed. On my first two ...
3
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1answer
66 views

Question about the diacetyl rest process

When producing beers that must have a "clean" / "neutral" flavor like lagers, usually the fermenting temperature is low to prevent off-flavors to show. But then, is recomended to apply a diacetyl rest ...
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4answers
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Should I ferment a new batch directly on the yeast cake generated by the previous batch?

I'm going to re-use the yeast cake from a low-gravity batch to ferment a high-gravity batch. Can I just put the wort directly on it? Does it then need to be agitated? Is it worth the risk of ...
5
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5answers
654 views

Which strains of yeasts are the cleanest for warm/hot fermentation?

I am from Puerto Rico and the temperature here is like summer all year round(between 75 to 95*F) , and I really want to know the cleanest strains of yeasts for this kind of temperature. (clean ...