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OfflineBurblesV
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DIY Cheap & Safe Large Scale Steam Sterilizer - would this work?
    #20275479 - 07/15/14 06:14 AM (10 years, 6 months ago)

I'm imagining a 55 gallon metal drum with some water in the bottom and a lid with a reflux condenser at top. The spawn bags would sit on shelves above the water, and protected from the returning cold water from the reflux condensor.


In the 55 gallon drum the boiling water would have  calcium chloride in it, possibly as much as 40 to 45% but likely less.
I think the boiling point of a 40% calcium chloride  solution would reach a temperature equal to a pressure cooker at 15psi? Which is 121*C or more. This would create very hot steam, which I assume would heat the spawn bags much quicker.


Is there any possible reason this may not work?


One I can think of is that since the substrate will have water in it, and non of it will be under pressure, that would boil and cause the bags to either explode or dry out.
Perhaps just adding a small amount of calcium chloride so that the steam is slightly hotter than boiling (105*C to 110*C?) would be better and functional?


I want to produce sterilized spawn in bulk, similar to red RR way using steam and near atmospheric pressure. Am I on the right track?



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OfflineRogerRabbitM
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Re: DIY Cheap & Safe Large Scale Steam Sterilizer - would this work? [Re: Burbles]
    #20275622 - 07/15/14 07:18 AM (10 years, 6 months ago)

No.  Simply use regular water without caustic compounds which will degrade the barrel almost immediately.  You can sterilize grain spawn with steam just like brf tek if you do it for 8 hours.

I built a wood fired steam boiler because I have access to unlimited firewood, but you can see the gas powered earlier versions on my site too.
RR


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OfflineBurblesV
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Re: DIY Cheap & Safe Large Scale Steam Sterilizer - would this work? [Re: RogerRabbit]
    #20275756 - 07/15/14 08:14 AM (10 years, 6 months ago)

Wouldn't hotter steam be preferable?

So, if I had a 55 gallon drum with boiling/refluxing water in the bottom, and shelves above with grain - and run it boiling for 8 hours it will fully kill all the endorspores, etc?

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OfflineRogerRabbitM
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Re: DIY Cheap & Safe Large Scale Steam Sterilizer - would this work? [Re: Burbles]
    #20276030 - 07/15/14 10:09 AM (10 years, 6 months ago)

I'm pretty sure that's what I said above as well as in dozens of previous threads.

No, 'hotter' steam is not preferable if it involves caustics. 8 hours at 100C will render grain ready for inoculation once cool.  Be sure to leave a vent open on top so the steam can escape.
RR


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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."
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InvisibleSpitballJedi
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Re: DIY Cheap & Safe Large Scale Steam Sterilizer - would this work? [Re: RogerRabbit]
    #20276053 - 07/15/14 10:17 AM (10 years, 6 months ago)

:takingnotes:


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OfflinecronicrMFacebook
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Re: DIY Cheap & Safe Large Scale Steam Sterilizer - would this work? [Re: SpitballJedi]
    #20276114 - 07/15/14 10:44 AM (10 years, 6 months ago)

Quote:

SpitballJedi said:
:takingnotes:



QFT!


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