Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [yeast]

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

1
vote
1answer
32 views

Is it normal to see yeast cells stacked in the Z axis when counting yeast?

I just got started with yeast cell counting and was surprised to observe yeast cells that are at different z axis depths at 400x. That is, by adjusting the focus (not the x/y stage) I can make some ...
3
votes
2answers
54 views

will two strains of yeast mess each other up

I put an old packet of yeast into my beer and it is barely fermenting. If I add a second type of yeast will the first one have any effect?
1
vote
1answer
24 views

Remaining ginger bug

This is the first time I will make a ginger bug and the process seems very simple but my question is. How long can I keep feeding my ginger bug and if I will be using that bug to make ginger beer ...
6
votes
1answer
106 views

Will reused yeast change beer taste?

I noticed that some breweries and home brewers reuse yeast for next batch. But from what I read about yeast mutation and generations that every new cell generation is bit different and can affect ...
1
vote
1answer
52 views

Pressurized Ferment Yeast Harvest — what are these layers?

I'm poured the keg remnants from a pressurized ferment into a beaker to let it settle out but I'm puzzled by the layers I'm seeing. From a typical non-pressure ferment, you see (from the bottom up), ...
2
votes
2answers
47 views

Help me debug my Christmas Ale band-aid flavor

Recently I brewed two batches of a copycat Christmas Ale. You can ignore the recipe's water adjustments, since I didn't do them. Before fermenting, the wort smelled and tasted perfect - just the ...
0
votes
1answer
33 views

Bentonite could change the yeast taste?

hello I am new in this kind of things. I would know if I use Bentonite it could change the taste and smell of yeast in the fermentation ? I am gonna use breed yeast. I would quickly finish my product ...
1
vote
1answer
40 views

Wine yeast or champagne yeast which will ferment quicker? [closed]

Hello I would want quick method if I use breed yeast the fermentation finish in 7-10 days. But its taste is terrible. I would like to know, between Champagne and Wine yeast - which one is faster ?
0
votes
2answers
34 views

Measuring yeast for pitching into very small batches

Disclaimer; I am brewing predominantly ginger beer, and experimenting with some commercial yeasts in pitching. My batches of ginger beer are 1~2 gallons max, as it's consumed pretty quickly and I ...
4
votes
1answer
68 views

Can yeast survive being almost frozen?

After forgetting to place the yeast starter in the fridge overnight I placed it in the freezer this morning for a short while to do a quick cool crash. I misjudged the time and the water above the ...
3
votes
4answers
89 views

Yeast pitching temp/ ferment temp

I have read here and there that it is ok to pitch your yeast at a high temperature, say 83°F? Seeing as it will take a considerably long time for the temperature to drop to an ambient 68°F then ...
0
votes
2answers
40 views

Ginger Beer ABV from Bakers Yeast

I’ve made ginger beer a few times. I usually make it with just fresh ginger and raw honey. Usually the I get well less than 2% ABV. This last week though I used a different honey, sourced from a farm,...
2
votes
1answer
38 views

removing sugar / dead yeasts / residues from keg

Due to some CO2 cylinder carbonation problems I have resorted to the desperate method of pouring sugar into the keg. Which is probably bad, as I have found out here all I needed was lower temperatures ...
5
votes
4answers
240 views

Measuring alcohol content

How do you measure alcohol content in a fermented drink without relying on measurements of gravity? Say we have a bottle of water (pasteurized), add sugar (that has been treated to have no living ...
1
vote
1answer
25 views

WLP648 does it make a sour?

I've been reading up on WLP648, but can't determine if this yeast will develop a sour beer on its own or if it requires something else to become properly sour aside from 3-6 months. I've read some ...
1
vote
1answer
51 views

First Time - Honey Mead questions

I am making Honey Mead for the first time soon, I will try making 2 1 gallon jugs. I have everything I need (Jugs, siphon, DAP, red star wine yeast, honey, sanitizer, carboy), but I want to make a ...
1
vote
2answers
44 views

Should I let hydrated dry yeast cool before pitching

The Gospel of John states that dry yeast should be hydrated at a temperature warmer than what you would typically start fermentation. But John also states that yeast should be pitched from cold to ...
2
votes
2answers
39 views

Could killer yeast affect my sourdough starter?

I've just pitched K1-V116 into a batch of rosehip wine. As I finished, thoughts of one kind of yeast led to another and I went to feed my sourdough starter - and stopped. K1-V1116 is a killer strain ...
2
votes
1answer
23 views

Beer yeast for wine making?

Does anyone know if it works to use beer yeast to make wine. I've got a batch of chardonnay grape crushed and sitting in my fridge right now, but I bought beer yeast by mistake. Can I use the beer ...
1
vote
2answers
84 views

Making alcohol at home from sugar and baking yeast

I am trying to make alcohol from baking yeast I didn't use any special tools or airlock I got the normal baking yeast, sugar(sucrose) and water Dissolved sugar in water putting the yeast in the ...
1
vote
2answers
120 views

To ferment or not to ferment for no alcohol

I am making ginger beer. I’m using basically raw ginger and honey and fermenting with bakers yeast. I’m getting somewhere between 2% & 2.3% ABV in testing. I don’t want any alcohol in the ginger ...
3
votes
3answers
56 views

Yeast or not to yeast, that is the question

So this is the third year I am making home made wine from a combination of red (75%) and white(25%). In the past the person in which I purchased from had a big industrial blender of sorts and gave me ...
4
votes
6answers
225 views

how to cultivate the beer yeast?

Do i need beer yeast for cultivating my own beer yeast? because i tried to brew beer with bread yeast and the result was not satisfying. Also, in my country as an islamic country it's not easy to find ...
4
votes
1answer
59 views

What is a realistic growth factor in large volume stir plate yeast starters?

The Homebrew Dad yeast starter calculator (which gives you more numbers than the Mr. Malty one does) promises a yeast growth factor of about 45 times for 10 billion cells pitched into 3 litres of 1....
2
votes
1answer
62 views

Time lapse, adding yeast a week late

After getting my grape juice in a bucket, I added the sugar and wild yeast killer. Didn't have the yeast to add before sealing it up. Checked the next day, it has a purple foam that collected on top. ...
2
votes
2answers
67 views

How long can you wait till you add the proper yeast

I crushed my grapes added 5 lbs sugar and a wild yeast killer pectic enzyme. I haven't got the yeast for the correct grape wine process. It's been 6 days. The temperature has been maintained around ...
1
vote
3answers
92 views

Reducing the taste of yeast

How can I reduce the taste of yeast in my homebrew? Obviously filtering but are there additional options?
4
votes
4answers
115 views

Alternative to stir plate for yeast starter (and erlenmeyer flask)

Looking at creating my first yeast starter for a DIPA recipe with on O.G. target of 1.085. For this O.G. Brewer's Friend is telling me I would need a 3L starter of an O.G. of 1.040 with a stir plate ...
1
vote
2answers
67 views

Yeast Attenuation

Does the percentage attenuation of the yeast, directly match the fermentability of the wort, ie, If i am after a one fifth gravity beer, then that has attenuated by 80% . so is the spirit indication ...
4
votes
1answer
52 views

Home brewing for undergraduate study

I am thinking of making a beverage out of locally available starch sources. My question is, is there a possibility to convert those starchy objects to fermentable sugars? And what type of yeast should ...
5
votes
3answers
239 views

How long does it take for yeast to mutate into having other characteristics?

I have heard yeast can mutate when you re-use yeast, and when it goes through many yeast-generations. How long does it take for the yeast to mutate? Which factors have an impact on the ...
2
votes
3answers
56 views

Wine or cider yeast for ale

I'm a noob brewer and being distracted added boiling water to my yeast. I added cold water immediately however I'm afraid I may have committed yeastocide. The only place I could think of around me ...
2
votes
1answer
42 views

Czech Pilsner - S-23 Yeast Alternatives Temperature Concerns

I have made a Czech Pilsner using S-23 Yeast and had very good results fermenting in a small refrigerator. Since, I don't have that refrigerator any longer, is there a substitute yeast that doesn't ...
3
votes
3answers
195 views

Culture yeast from bottles

i have read that we can culture yeast from commercial bottle conditioned beers, So is it not the same that we can use a bottle of our own beer that has been made from a brew that used a White labs or ...
2
votes
2answers
70 views

Removed air lock ,while in the first day of fermentation

Can any damage be done when air lock is removed for about 3 to5 minutes. I repitched yeast this morning.what can I expect?
-1
votes
2answers
49 views

Is it worth saving my brew?

I have started off a Cider kit. It was close to the BBD. It only actively foamed for a day or so and looked finished or dead (but in those two days has dropped from 1040 to 1018 however I didnt know ...
1
vote
3answers
195 views

Failed primary fementation - repitch?

Yeast: Mangrove Jack's M44 - US West Coast Yesterday I brewed an IPA recipe but had a couple of issues when it came to pitching the yeast. The first was that I could not get the wort temperature ...
7
votes
1answer
145 views

What is necessary to keep yeast happy and healthy?

If you take left over yeast from a wash and dump it in new mash, and repeat, eventually the yeast stop reproducing due to extensive budding scars. So after 4-12 batches people buy new yeast... if not ...
4
votes
1answer
65 views

What yeast should I use to make a semi-sweet Ginger Beer with about 5% ABV

I want to make a semi-sweet (a little less sweet than Crabbies) ginger beer that is about 4.5 to 5.0% alcohol, and my plan was that in the end, I want it to be between 1.020 and 1.025 s.g.. Therefore ...
2
votes
2answers
49 views

Starters for 1500 litre brewing with 100 g of Dry Yeast

What is the possible way to brew batch like 1500 liter with 100 g of yeast ? And how many starter steps need to go and how long will it take to get target pitch rate ? Thanks all !! P.S I'm new ...
0
votes
1answer
66 views

WLP066 London Fog fermenting smell

I'm fermenting a NEIPA at the moment. It's 5 days in. At first the fermenter snelled great, the usual sweet and hoppy smell but now it smells weird like a cheap lager that's been left out all night. ...
2
votes
1answer
38 views

FG not achieved after two weeks.

I have brewed a stout intended to be around 6%. After two weeks the FG is 1.024 but expected to be closer to 1.010. I found when I made the yeast starter (Giga Yeast 011) the yeast clumped and ...
3
votes
1answer
37 views

Cell growth factors in different types of yeast starter

Cell growth in a yeast starter is dependent on the volume of starter wort. Palmer states that as a general rule of thumb, a 1 liter starter roughly doubles the cell count while a 3 liter starter about ...
5
votes
3answers
109 views

how does light affects yeasts

according to this research: Red LED light (630 nm) stimulated cell growth but slightly inhibited ethanol formation. In contrast, Blue LED light (470 nm) significantly inhibited cell growth but ...
1
vote
3answers
72 views

why do we try to get rid of sediment?

A brief question, I will add details tomorrow. I am fermenting fruit wines in the pet-Nat style. I find the yeast and yeast activity in wines exciting, full bodied, healthy and invigorating. Drinking ...
2
votes
2answers
45 views

Yeast harvesting from bottle and fermenter

I harvested some custom Saison yeast from a particular brewery I like. I made a starter and have kept in the fridge. As there was only a small amount in the bottle (as expected), the amount of yeast ...
5
votes
1answer
72 views

Saving Kveik the old fashioned way?

I've been reading about Norwegian Farmhouse Ales and I'm quite curious about them. Should I drag a wooden wreath through the dregs of my Norwegian Farmhouse Ale and hang it up to dry and re-use it? Is ...
3
votes
2answers
110 views

Any way to deal with bitter taste from turbo yeast?

I had some turbo yeast left over, and figured I'd try make a couple litres of ginger beer (sugar, grated ginger, a little lime juice) and elderflower wine (sugar, elderflowers, lemon juice and zest) ...
2
votes
2answers
118 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 ...
2
votes
3answers
135 views

Going past alcohol tolerance

I have recently started thinking of getting into make mead and decided on a nice 15% to start. I decided to oversweeten the batch because I don't want a real dry mead. I want to add berries to the ...