National Homebrew Club Ireland

Brewing Discussions => All Grain Brewing => Topic started by: Vermelho on September 20, 2015, 12:17:30 AM

Title: M44 Yeast and probable infection
Post by: Vermelho on September 20, 2015, 12:17:30 AM
So I did a split batch brew with two different yeast of Mangrove Jacks M44 and WLP051. During fermentation I noticed a raw red meat smell coming from the beers but wasn't sure which one. It turns out it was the M44. I tested the beer and it fermented fine but now has an aroma of red meat and tastes like a hefeweiss. Anyone ever come across anything like this before?

The WLP051 is fine and I bottled it this weekend.
Title: Re: M44 Yeast and probable infection
Post by: armedcor on September 20, 2015, 12:25:32 AM
I can confirm the red meat smell...also it tastes like a Weiss beer yet contains no wheat at all.
Title: Re: M44 Yeast and probable infection
Post by: DEMPSEY on September 20, 2015, 09:28:05 AM
You might have a new creation a weiss  beer with no wheat :). What does the spec sheet for this yeast say about it.
Title: Re: M44 Yeast and probable infection
Post by: DEMPSEY on September 20, 2015, 09:52:10 AM
Had a quick read of the pdf form for this yeast and it says nothing about raw meat :( however this might explain
Underpitching can cause lag time and issues with off flavours
Title: Re: M44 Yeast and probable infection
Post by: Eoin on September 20, 2015, 12:51:32 PM
Meat smells suggest autolysis.
Title: Re: M44 Yeast and probable infection
Post by: Vermelho on September 20, 2015, 01:17:48 PM
Yeah, I don;t think raw meat is a common yeast aroma. I think it's f**ked.
Title: Re: M44 Yeast and probable infection
Post by: armedcor on September 20, 2015, 01:34:34 PM
I'll bring you a bit of melange yeast cake next week and we'll sour it 😉
Title: Re: M44 Yeast and probable infection
Post by: Pheeel on September 20, 2015, 09:35:58 PM
I gave up using m44. Had a couple of mucky beers from it  ???