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BKRN
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Registered: 04/26/20
Posts: 6
Last seen: 2 years, 10 months
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BRF cake contamination identification
#26721159 - 06/05/20 07:24 AM (3 years, 7 months ago) |
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Hello. I was wondering if any of you have any ideas as to what kind of contamination I'm dealing with here. I've read through the common contamination guide thread but I can't with much confidence match this with anything I've seen there. The area is pretty much the same color as the mycelium, only not as dense and it hasn't really thickened at all for over a week or so (I've kept the two affected cakes separately to observe them for educational purposes.) It's fluffy and doesn't appear to have any stringy quality to it. You can also clearly see the borders between the two inhabitants, marked by discoloration.
https://i.imgur.com/iibxiRh.jpg
https://i.imgur.com/OFMXly3.jpg
Edit: Replaced the huge embedded pictures with direct links.
Thanks in advance for your input.
Edited by BKRN (06/05/20 07:58 AM)
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ApostleofAzathoth
lunatic wielding pressure cooker



Registered: 11/16/17
Posts: 697
Loc: Somewhere in the PNW
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Re: BRF cake contamination identification [Re: BKRN]
#26721194 - 06/05/20 07:37 AM (3 years, 7 months ago) |
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I'm no expert but I am confident that is bacterial contamination. Doesn't look to severe though. I'd wager the cakes are still viable. The moisture content in the jar looks a bit high which might be contributing to the problem. Good luck!
EDIT: Hold up, was just looking at the bottom photo. I'm not sure what that white stuff is on the first shot, but if it is not cube mycelium then nix what I said about the jar being viable. Have any closer shots of that area?
Edited by ApostleofAzathoth (06/05/20 07:39 AM)
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BKRN
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Registered: 04/26/20
Posts: 6
Last seen: 2 years, 10 months
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Quote:
ApostleofAzathoth said: I'm no expert but I am confident that is bacterial contamination. Doesn't look to severe though. I'd wager the cakes are still viable. The moisture content in the jar looks a bit high which might be contributing to the problem. Good luck!
EDIT: Hold up, was just looking at the bottom photo. I'm not sure what that white stuff is on the first shot, but if it is not cube mycelium then nix what I said about the jar being viable. Have any closer shots of that area?
Thanks for your help so far. I don't think I can get pictures any sharper than these. I won't be embedding them anymore as they're huge and I feel like they disrupt the flow of the thread.
https://i.imgur.com/S4GYBWI.jpg
https://i.imgur.com/OcwOmOz.jpg
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ApostleofAzathoth
lunatic wielding pressure cooker



Registered: 11/16/17
Posts: 697
Loc: Somewhere in the PNW
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Re: BRF cake contamination identification [Re: BKRN]
#26721269 - 06/05/20 08:12 AM (3 years, 7 months ago) |
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Those are great. After seeing the four I'd wager you just have the bacteria. I could be missing something though and that one patch does look a bit odd. If it's just the bacteria then it probably won't smell great coming out of the jar, but once the environment is a bit dryer it may fight it off. If you've got clean jars then consider tossing these for your noses sake, but in a pinch I've gotten multiple flushes from worse looking jars.
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BKRN
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Registered: 04/26/20
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Last seen: 2 years, 10 months
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Well, I don't mind birthing those, especially if there's a chance of salvaging them, I'm just concerned about whatever that is potentially spreading to my other cakes which turned out contamination-free (they're soaking right now,) and ruining the entire operation.
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BKRN
Stranger
Registered: 04/26/20
Posts: 6
Last seen: 2 years, 10 months
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Re: BRF cake contamination identification [Re: BKRN]
#26724416 - 06/06/20 03:40 PM (3 years, 7 months ago) |
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Okay, so in case you're interested, I got these out of the jars. There was no immediate smell, other than what I would expect, upon removing the tin foil and giving them a whiff. The cakes themselves did give off a scent I'm unable to compare with anything specific. It wasn't overpowering at all though and I pretty much had to really get my nose in there. I would describe it as dank, something you would smell in a basement, maybe very slightly sour but also kind of rubbery. I wouldn't call it definitely unpleasant though.
The white coating on those weird parts appears to have been superficial as I can no longer see it after washing the cakes before dunking them.
There were two of those with one being almost fully colonized by the desired mycelium and the other one having more of the funk.
Here's the "healthier" one, before being rinsed.
https://i.imgur.com/AECE6mR.jpg
And the other one after washing. I wonder if this one's going to dissolve, on account on not being colonized as much.
https://i.imgur.com/WPlbOBD.jpg
The jars (well, they're technically glasses) didn't retain any of the smell for the first one and a very slight amount for the other one - I reckon they'll be scent-free after I clean them.
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