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InvisibleRockOyster
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Registered: 07/09/19
Posts: 5
Sterilization times for grain spawn bags
    #26098892 - 07/09/19 07:24 PM (5 years, 6 months ago)

I have 2 bags of grain spawn in the PC, however, I can't seem to find a good rule of thumb for sterilization time. The bags are about 6 1/2 lbs each and I have 2 of them in my Presto PC (23 qt).

They have been in for an hour at 17 psi, so quick responses are greatly appreciated.

I will be doing a G2G transfer with an entire quart of colonized rye spawn for each bag.

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Offlinesouthbounpachyderm
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Registered: 07/20/18
Posts: 282
Last seen: 4 years, 5 months
Re: Sterilization times for grain spawn bags [Re: RockOyster]
    #26098965 - 07/09/19 07:56 PM (5 years, 6 months ago)

Go another hour at least. Takes a while for bags to hit sterile core temps.


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InvisibleMunchauzen
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Registered: 06/22/11
Posts: 14,348
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Re: Sterilization times for grain spawn bags [Re: southbounpachyderm]
    #26098969 - 07/09/19 07:56 PM (5 years, 6 months ago)

usually do my bags for 3 hours. but be careful that you don't run your PC dry.

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InvisibleRockOyster
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Registered: 07/09/19
Posts: 5
Re: Sterilization times for grain spawn bags [Re: Munchauzen]
    #26098996 - 07/09/19 08:07 PM (5 years, 6 months ago)

They just hit the 1 1/2 hour mark and I think the PC will have enough water. The bags were elevated on 2-3 layers of rings and water reached ~1/2 up the lower bag. I'm still working out the kinks.

How large are your bags Munchauzen?

Stamets says that he sterilizes "standard" 10 lb bags for 4 hours, and gallon jars for 2 hours. Seems to me that I am somewhere in the middle.

Thanks ya'll!

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InvisibleFunky Monkey
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Registered: 05/14/19
Posts: 1,099
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Re: Sterilization times for grain spawn bags [Re: RockOyster]
    #26099225 - 07/09/19 09:26 PM (5 years, 6 months ago)

Run them for 2.5 - 3 hrs and you should be good.

I run that size bag 4 at a time in my 23 quart presto.



If you can do large 5lb dense sawdust blocks and be good at 2.5 hrs, then anything more than 3 hrs is overkill I think for a bag this size.

TIP: When prepping bags make sure your grains are much more on the dry side to avoid excess moisture and bacteria problems.

-Funky Monkey :hamsterdance:

Edited by Funky Monkey (07/10/19 11:40 AM)

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InvisibleBoogieman47
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Registered: 03/05/16
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Re: Sterilization times for grain spawn bags [Re: Funky Monkey]
    #26099266 - 07/09/19 09:52 PM (5 years, 6 months ago)

They maybe water logged if you had that much water up the bag .. I put pint jars in the bottom and load with 3 qts water when running bags I also weigh my weight down with quarters 18 psi no hiss and cook for 4 hours but I do 5 full qt of grain per bag


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