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mycocurious
Mike O. Kuerias



Registered: 02/09/07
Posts: 1,265
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Butyric acid in substrate...
#7515732 - 10/14/07 01:00 PM (16 years, 3 months ago) |
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(RR - your feedback would be appreciated)
As I finished spawning the last tray of my current run my wife noticed that the batch of compost I was using had a distinct sour milk smell after it was composted. The smell didn't manifest itself until after it was steam pasteurized, so I'm a little dubious on if the bacterial contamination is still present or if my wife is just smelling all the butyric acid by-product "remains".
Either way, the real question is just how bad will the butyric acid be on the colonizing mycelium... Ultimately I know what should be done but I'm curious to see how it'll end up...
Sucks to lose a perfect run to shoddy substrate.
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Don't mistake my tone for a "matter-of-fact" attitude. I'm just presenting what I believe to be correct, until I'm corrected... - How Myco-Curious Prepares Coir & Compost Substrates - How Myco-Curious Builds A Bulk Humidifier - How Myco-Curious Builds An Automated Greenhouse ------------------------------------ figgusfiddus said: Keep in mind that inoculating or whatever in front of a flow hood won't help your bad substrate, your bad inoculant, your bad sterile procedure, etc. etc. etc. It's not a +3 flowhood of magic, it's just a tool.
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 3 days
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Re: Butyric acid in substrate... [Re: mycocurious]
#7515849 - 10/14/07 01:34 PM (16 years, 3 months ago) |
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If it was pasteurized, it should be OK. Bacteria isn't usually a problem with bulk substrates anyway. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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xaxphaanes
Mycologist



Registered: 08/08/05
Posts: 2,988
Last seen: 1 year, 5 months
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Re: Butyric acid in substrate... [Re: mycocurious]
#7515857 - 10/14/07 01:36 PM (16 years, 3 months ago) |
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Hmm strange that you didn't smell it before the steam.Usually you can smell it pretty bad when you have Anaerobic conditions within a compost pile.Personally i wouldn't use it for mycelium.
-------------------- "Anything i say is fictional" what you should look for in manure
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mycocurious
Mike O. Kuerias



Registered: 02/09/07
Posts: 1,265
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Re: Butyric acid in substrate... [Re: xaxphaanes]
#7516002 - 10/14/07 02:23 PM (16 years, 3 months ago) |
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It is odd that the smell didn't "bloom" until this morning after being steam pasteurized (60 minutes @ 155(F)) last night...you'd think I'd have noticed it when it was harvested, or when I had it sun-drying on my patio...or at least when I hydrated it again last night.
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Don't mistake my tone for a "matter-of-fact" attitude. I'm just presenting what I believe to be correct, until I'm corrected... - How Myco-Curious Prepares Coir & Compost Substrates - How Myco-Curious Builds A Bulk Humidifier - How Myco-Curious Builds An Automated Greenhouse ------------------------------------ figgusfiddus said: Keep in mind that inoculating or whatever in front of a flow hood won't help your bad substrate, your bad inoculant, your bad sterile procedure, etc. etc. etc. It's not a +3 flowhood of magic, it's just a tool.
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croptop30
Stranger
Registered: 09/27/07
Posts: 37
Last seen: 16 years, 2 months
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Re: Butyric acid in substrate... [Re: mycocurious]
#7516226 - 10/14/07 03:25 PM (16 years, 3 months ago) |
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Well I usually have the same problem but I always used to think my bulk substate was contaminated cause of the smell. But It never really smelled like Ammonia like contamination usually smells but I ended up throwing out alot potentially good casing because I thought they were screwed. As long as you don't actually see contamination and you do see healthy mycelieum poking through the surface your probably good. I have had that smell right up until the first flush at times and then eventually the smell turned to your typical earthy mushoom smell.
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