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phenyl
Stupid person


Registered: 09/03/22
Posts: 544
Loc: One toke over the line
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Re: Rye problems and European pressure cookers [Re: Bismillah]
#28651878 - 02/08/24 03:57 PM (11 months, 2 days ago) |
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I had various issues like this, including with the Pt100 showing a good temperature and messing about chasing phantom contamination. Fix was to buy a Presto. Wasted months on the problem and god knows how much grain. Euro pressure cookers aren't made for our needs.
Reviewing your grain prep might help. Dry grain doesn't sterilize properly. 3 hour cycles are common for instant pots which operate at about 10 PSI - worth a try I guess. Also worth considering altitude adjustments if you're at a high altitude.
-------------------- The fool who persists in his folly will become wise.
Edited by phenyl (02/08/24 04:06 PM)
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Bismillah
Scharf im Schlafanzug


Registered: 07/11/22
Posts: 231
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Re: Rye problems and European pressure cookers [Re: phenyl] 1
#28660445 - 02/15/24 07:17 AM (10 months, 26 days ago) |
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I'm pretty confident with my pt100, but yeah, there's allways some uncertainty. I would have to pay $125 just for shipping and VAT for a Presto, so that's why me and many other Europeans try to get away with what's available here.
The last oat batch is good. I saw some moisture on the inside of a jar but I guess it's just benign metabolites. After spawning I took some of the kernels that were clinging on the insde of the jar and put them on agar. Only healthy myc is growing with no signs of bacteria.
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LyleChipperson


Registered: 09/29/23
Posts: 468
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Re: Rye problems and European pressure cookers [Re: Bismillah]
#28660898 - 02/15/24 02:54 PM (10 months, 26 days ago) |
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I was looking for a budget pressure cooker in Europe and ended up rolling the dice on this brand. I found a 17lt version for about 60 EUR locally, not sure if they are available all over the EU but they're worth looking into. They seem like cheap garbage but so far they get the job done just fine. I run everything at the standard recommended times for sterilization and I've had no obvious issues coming from the PC itself.
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phenyl
Stupid person


Registered: 09/03/22
Posts: 544
Loc: One toke over the line
Last seen: 7 hours, 15 minutes
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Re: Rye problems and European pressure cookers [Re: Bismillah]
#28662836 - 02/16/24 06:58 PM (10 months, 25 days ago) |
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Quote:
Bismillah said: I'm pretty confident with my pt100, but yeah, there's allways some uncertainty. I would have to pay $125 just for shipping and VAT for a Presto, so that's why me and many other Europeans try to get away with what's available here.
The last oat batch is good. I saw some moisture on the inside of a jar but I guess it's just benign metabolites. After spawning I took some of the kernels that were clinging on the insde of the jar and put them on agar. Only healthy myc is growing with no signs of bacteria.
That's fair enough. I paid about £190 for my presto from Amazon US after trying 3 different models (little one like you have, the Turkish one the guy above me has and a Chinese lab autoclave) and haven't looked back since. Too small for the European models and the Chinese autoclave was just garbage.
Ultimately my issue came down to the crappy Chinese autoclave having a high density heating element that would give a false reading to the sensor if it was placed above the heating element. Different sensors would give different readings depending on where the sensor was placed. Really annoying. The best thing was when the sensor would have connection issues and instead of failing it would give a value with a random offset.
Getting bacteria to grow well on malt extract agar will be tricky since it's quite acidic. Oats aren't the best grain either, very hard to hydrate and sometimes leads to poor thermal transfer into the grain, thus (often latent) bacteria issues. My two cents if you're confident in your thermocouple.
-------------------- The fool who persists in his folly will become wise.
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Bismillah
Scharf im Schlafanzug


Registered: 07/11/22
Posts: 231
Last seen: 3 days, 14 hours
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Re: Rye problems and European pressure cookers [Re: phenyl]
#28664811 - 02/18/24 12:35 AM (10 months, 23 days ago) |
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I appreciate your 2 cents. I just grow small scale, so I haven't felt the need for a big PC. I follow Bod and others who just boil oats for around 30 min, no soak. Seems to hydrate well.
I'm not sure MEA is acidic, I've read before that it's neutral. Besides I was using BRF agar for this test.
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