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Offlinebaldur
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Industrial grain spawn - do they just use large pressure cookers? Or is there a trick....
    #28015373 - 10/25/22 02:58 AM (2 years, 2 months ago)

I'm curious to know how the mushroom industry has optimized their grain spawn production?

I remember seeing Southwest Mushrooms on Youtube showing off his massive pressure cooker that was about the size of a small submarine :grin:

Is the trick just larger pressure cookers? Sounds awfully wastefully of energy to me.

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Invisibleruawakeyet
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Registered: 05/03/21
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Re: Industrial grain spawn - do they just use large pressure cookers? Or is there a trick.... [Re: baldur]
    #28015387 - 10/25/22 03:29 AM (2 years, 2 months ago)

I would assume one large batch would be more energy efficient than a lot of small batches. Were they electric or gas powered? Natural gas would be more cost effective than electric.

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OfflineLand TroutM
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Re: Industrial grain spawn - do they just use large pressure cookers? Or is there a trick.... [Re: ruawakeyet] * 1
    #28015493 - 10/25/22 06:24 AM (2 years, 2 months ago)

In Asian there are mushroom farms that have pressurized sterilizing vessels you can drive forklifts into.  Don’t know if their called autoclaves, retorts, or canners at that point.
I’ve got to hang around abandoned canneries in Alaska and there are large canners retorts that are have rails the canner racks are loaded on and the power plants are large diesel generators, but I’m not sure exactly how they were heated, steam pump, maybe?

Edited by Land Trout (10/25/22 07:57 AM)

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OfflineB Traven
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Re: Industrial grain spawn - do they just use large pressure cookers? Or is there a trick.... [Re: Land Trout]
    #28015559 - 10/25/22 08:00 AM (2 years, 2 months ago)

I recall some thread I saw sometime on here where Roger Rabbit was discussing the sterilization versus temperature curve.

Basically, the gist of it was that industrial facilities can build massive low-pressure sterilizers- like, a whole building- and just run everything for like 3 days.

I'm curious how many other species, especially non-active edible and medicinal mushrooms, are as delicate as cubes. From what I've seen and read, it seems like oysters, for instance, just eat most common contaminants.


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Invisiblekirkeng
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Re: Industrial grain spawn - do they just use large pressure cookers? Or is there a trick.... [Re: Land Trout]
    #28015681 - 10/25/22 10:08 AM (2 years, 2 months ago)

Quote:

Land Trout said:
In Asian there are mushroom farms that have pressurized sterilizing vessels you can drive forklifts into.  Don’t know if their called autoclaves, retorts, or canners at that point.
I’ve got to hang around abandoned canneries in Alaska and there are large canners retorts that are have rails the canner racks are loaded on and the power plants are large diesel generators, but I’m not sure exactly how they were heated, steam pump, maybe?




Where I worked a while back we had one of those not quite as large but still fairly large, had it hooked up to a home boiler, the thing was kinda sketchy though and inefficient especially in the winter. But hey it worked well.

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Offlinebaldur
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Registered: 06/30/21
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Re: Industrial grain spawn - do they just use large pressure cookers? Or is there a trick.... [Re: baldur]
    #28036046 - 11/06/22 06:42 AM (2 years, 2 months ago)

This industrial tank is quite interesting, and running a whole building as a low PSI PC for 3 days is insane! :smile:  But quite possibly pretty smart.

A little bird told me that a pretty large scale operation (1000 monotubs) was using these 30-gallon brew kettles:

https://www.beveragefactory.com/homebrew/pre-fermentation-equipment/xbk30-30-gallon-brew-kettle.html

to sterilize all their spawn, which was possibly 6L of spawn in an Unicorn XLS-T bag, or at least similar size. These guys were growing magic mushrooms mostly, not normal supermarket mushrooms.

Now I don't think there was any modification, and therefore no pressure.

Is this at all possible? Don't we need >100C to be able to kill all the microbes? Or is 100C plus shitloads of time enough?

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Invisiblecooleko
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Registered: 08/15/22
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Re: Industrial grain spawn - do they just use large pressure cookers? Or is there a trick.... [Re: baldur]
    #28036123 - 11/06/22 08:08 AM (2 years, 2 months ago)

Heat plus time is good enough. Its why sous vide works. The problem is patience when the time required is large.

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