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

learn more… | top users | synonyms

1
vote
2answers
26 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..) ...
3
votes
3answers
26 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 ...
2
votes
2answers
43 views

Yeast not settling or infection?

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 ...
1
vote
1answer
26 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 ...
1
vote
1answer
53 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 ...
0
votes
0answers
7 views

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
votes
1answer
62 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 ...
1
vote
1answer
36 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 ...
2
votes
1answer
60 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. ...
4
votes
3answers
51 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 ...
3
votes
1answer
38 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 ...
1
vote
2answers
21 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 ...
3
votes
1answer
56 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 ...
0
votes
2answers
48 views

All purpose yeast

Suppose you only have one yeast available to produce wine, beer, liquor from fruits or grains. say post apocalyptic future, and you manage to have fruits or grains and you want to produce alcoholic ...
2
votes
1answer
47 views

Yeast for dubbel

I was planning on making 35L of 1.070 ish OG dubbel on Friday. I don't have any yeast to hand and was wondering whether the smack packs of http://www.brewuk.co.uk/wyeast-activator-3787-trappist.html ...
0
votes
2answers
63 views

Can this juice ferment without added sugar?

If I wanted to make a hooch out of "cranberry juice cocktail", which is composed of "water, cranberry juice, high fructose corn syrup, cranberry juice concentrate, and ascorbic acid, how would I go ...
1
vote
1answer
41 views

Mead Problem with Yeast

So the other day I created a mead and messed up... long story short I killed all my yeast by rushing. I added the dead yeast into my mead and it all sank to the bottom. I just racked off the dead ...
0
votes
1answer
36 views

Is yeast cell count a constant function of starter size?

Does the size of a starter always dictate the cell count of yeast irregardless of how much yeast you started with (ignoring other factors such as aeration, wort density etc)? For instance let's take ...
1
vote
3answers
315 views

How bad can this be?

So i got everything in my fermenting vessel last night and i got up this morning to find that the siphon lock was pushed in. I tried to slowly pull it back up through it's opening but the siphon ...
2
votes
1answer
84 views

Fermenting mead: low vs high temperature

I'm planning to make a batch of dry show mead (white wine experience). I have Lalvin 71B-1122 Narbonne yeast, and fermentation temperature range for it is from 59-89° F (15-30°C). Lets say how ...
1
vote
1answer
89 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 ...
1
vote
1answer
70 views

How long should I expect to wait before seeing activity in my yeast starter?

I usually see activity in my yeast starters in the first twelve hours after pitching the yeast. This time, however, I haven't seen anything for 48 hours. No bubbling, no signs of floating yeast and it ...
0
votes
1answer
55 views

Cider - Yeast doesn't seem to kick off

I have 2 x 23L carbouy's full of freshly pressed juice, ready for fermentation. I began the process by killing off all the wild yeast strains in the apples by adding 1 1/4 teaspoons of sodium ...
1
vote
1answer
42 views

Ale yeast re pitch

Okay so I racked this experiment into a 6 gallon glass, slowly brought it up to 68F and re pitched with Safale05. After 24 hours, there is very little activity. One bubble every minute. Is it ...
0
votes
2answers
117 views

Ale yeast at cold temps?

I made a modified Oktoberfest 11 days ago. I used an ale yeast to cut down on the time. I let it ferment at 68 degrees Fahrenheit for 4 days, then decided to put it in the fridge at 50 degrees. I ...
0
votes
1answer
144 views

I am brewing alcoholic ginger beer. How much sugar to prime it?

I am looking for this ginger beer to be sweet, spicy and very fizzy. Something which should violate your tongue's human rights. I have never produced a fizzy brew before so know nothing about ...
2
votes
1answer
64 views

Temperature when hydrating dry yeast

Some Lalvin yeast I bought is not doing anything in my wort. When I told people on an online forum I'd hydrated it with 40 degrees C water, they told me this was far too hot. But this is exactly what ...
0
votes
2answers
116 views

What type of yeast to use for a low ABV mead?

I'm looking to experiment making a low-alcohol mead (i.e. under 8% ABV). In terms of buying a sachet of yeast I can see standard beer/cider/wine variants and obviously for brewing there are loads of ...
5
votes
3answers
108 views

no brew shop here. use some warm beer as yeast?

it is hard to find beer yeast where I live. I was wondering if it is possible to just buy a bottle of good beer and use as yeast after bringing it to 25C temperature
3
votes
2answers
76 views

Imperial Stout with not enough yeast

I'm working on brewing an Imperial Stout and using a liquid yeast (WLP-007). Beer Smith is telling me that I need about 300bn yeast cells. However, it says I might get 180bn. I'm usually not a ...
1
vote
1answer
83 views

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 ...
1
vote
3answers
168 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. ...
2
votes
1answer
58 views

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.
0
votes
1answer
104 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 ...
2
votes
2answers
74 views

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 ...
6
votes
1answer
62 views

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 ...
0
votes
1answer
55 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 ...
0
votes
4answers
74 views

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 ...
1
vote
1answer
45 views

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 ...
2
votes
1answer
121 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 ...
2
votes
1answer
60 views

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?
4
votes
2answers
121 views

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 ...
1
vote
2answers
49 views

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 ...
1
vote
2answers
29 views

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.
4
votes
1answer
121 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 ...
1
vote
1answer
68 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 - ...
1
vote
3answers
162 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?
2
votes
2answers
45 views

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 ...
0
votes
2answers
168 views

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 ...
0
votes
2answers
52 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 ...