Questions tagged [contamination]

The introduction of unwanted organisms or chemicals into the beer. Typically, this refers to unwanted bacteria or wild yeast propagating to levels to cause spoilage of the beer. Often incorrectly called an "infection".

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17
votes
8answers
32k views

Can Infected beer cause death or major illness?

Basic question. Can you get sick and die from drinking infected brew? I know that it must taste terrible, was just wondering. Can't seem to find any references where people have died from infected ...
2
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2answers
351 views

Mold on wort pre-pitch

I've got a bit of mold on top of my wort. My situation is a bit different than what others seem to have encountered... I made the wort about 5 days ago and hadn't gotten around to pitching the yeast....
11
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3answers
15k views

does starsan kill yeast

Is Starsan effective against yeast? After resuming homebrewing again after a 2 year break, I started having pellicle appearing on my starters (after fermentation had completed), which has now spread ...
9
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1answer
3k views

Possibly infected mead: is it worth keeping?

I tried making cherry mead again (the first time I tried this it got infected). I tried again yesterday, and it looks like I've got some sort of contamination ("infection"). This time I thought that ...
8
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4answers
2k views

Cherry vinegar (was supposed to be mead)

Last week I started a cherry mead and discovered yesterday that it had turned to vinegar (and not even nice-tasting cherry-flavoured vinegar - it smelled and tasted awful, though the colour was great)....
8
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4answers
2k views

Can a contaminted brew be identified by sight?

I brew ten-gallon batches of beer split into two fermentors. The last batch that I kegged had one infected fermentor, while one remained uninfected. One bucket showed a white powdery substance ...
9
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5answers
3k views

What prevents contamination during primary fermentation?

I'm about to start my first beer and I've been doing lots of research.. but a question I haven't seen answered is why isn't there more contamination during primary fermentation. For secondary the ...
8
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4answers
10k views

What is this white stuff on the surface of my beer?

I've just gone to rack & bottle a witbier that has been in primary for about 5 weeks and noticed this white gunk floating on top of the beer. It doesn't look too healthy, what is it? Is it safe? ...
3
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3answers
873 views

Wild yeast taking over?

I brewed a belgian triple last week. I was making a starter using white labs trapist yeast, but it didn't take off; must have been a bad vial. So, I picked up a packet of wyeast trapist yeast and ...
7
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4answers
2k views

Lacto contamination in plastic fermenter = new fermenter?

Just bottled my first contaminated beer, got lazy and didn't freeze/boil the watermelon I added to a wheat beer and got lacto(?) contamination and an amazing sour watermelon beer as a result! But, ...
6
votes
1answer
4k views

What is the white film on my beer in my bottles?

I brewed a double batch of IPA with a buddy about 8 weeks ago. We split this into two 5 gallon pails and 2 weeks later into two carboys. His was fine, but mine developed a bit of white stuff on ...
10
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5answers
48k views

What kind of infection is this and is the beer ruined?

This is my first all-grain batch and unfortunately it has developed some kind of growth. It didn't smell like death, actually smelled pretty good, and the samples I have been taking have all tasted ...
13
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4answers
3k views

How to add adjuncts (hops, fruit, spices, etc) to the fermenter without contaminating the beer?

What is the best way to sterilize things like dry hops, spices or fruit before putting them in the fermenter? Some stuff you can obviously boil. But boiling hops, say, would defeat the purpose of ...
11
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3answers
13k views

Consequences of infection in a beer?

Everyone learns during their first brewing experience that you have to carefully sanitize anything that touches your wort after the boil to avoid infection. What happens when wort gets infected? How ...
7
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5answers
2k views

Help! My secondary fermenter exploded!

So, I was brewing a nice IPA the other day. I walked in to check on the carboy and the stopper had popped out and there were hops everywhere! I stopped it back up and bottled it a few days later ...
4
votes
1answer
450 views

Photo dictionary of things going wrong

Sometimes things don't go so well. Sometimes relaxing and having a homebrew doesn't quite do the trick. Sometimes it's not just going to fix itself. It would be helpful to have some images to compare ...
6
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5answers
10k views

What is on top of my wort? Mold? Lacto?

I just opened the top of my scotch ale bucket, and it looks like there's mold inside. The recipe is pretty standard, plus some oak chips soaked in whiskey, in a muslin bag. What is this? Edit: Some ...
5
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3answers
306 views

What about opened LME cans?

Most LME come in 3 pound cans, which is a quite large quantity if you want to add just a little to your wort, just one pound for example. It's a shame to throw away the rest. If I open a LME can and ...
8
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10answers
3k views

Spigots: What's the consensus

I like to use an ale pail with a spigot for my secondary. It makes it super easy to test the gravity before actually bottling/kegging/etc. However, that sort of installation in plastic can open the ...

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