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Valyr
Con nulla non si fa nulla.


Registered: 05/08/13
Posts: 381
Last seen: 6 years, 9 months
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Pasteurization questions
#19274761 - 12/14/13 01:25 PM (10 years, 1 month ago) |
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Ok so don't leave substrate within proper pasteurization temp ranges for more than 2hrs . Thanks bod.
And what temperature do you think the center should be at before shutting off water to stop the boiling and avoid sterilizing the sub? I know it will still raise some after shutting off the stove. The meat thermometers I bought start reading at 120 is that sufficient?
Does it matter how long it takes to get to pasteurization temp? We established that we don't want to leave it there too long but say I were to set my temp to that 160 (I have an induction burner with digital temp control) and just let it slow raise to core temp to 140 then start the timer would it matter any? This obviously would take longer than using boiling water.
And one last question. Would it be beneficial to let things germinate overnight or whatnot before pasteurizing substrate? Sorta like the soak on wbs.
Edited by Valyr (12/14/13 01:28 PM)
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cronicr



Registered: 08/07/11
Posts: 61,436
Loc: Van Isle
Last seen: 2 years, 8 days
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Re: Pasteurization questions [Re: Valyr]
#19275391 - 12/14/13 04:12 PM (10 years, 1 month ago) |
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Load the pre-moistened to field capacity casing mix, compost or manure into quart mason jars. Place a lid and/or foil over the top. Put the jars into a large covered pot of cold water, with the water filled to 2/3 to ¾ of the way up the jars. A large kettle or pressure cooker works well. If necessary, put a plate or some other weight over the jars to prevent them from floating. Make sure you have a spacer or dishtowel under the jars to prevent the direct heat of the stove burner or flame from cracking your jars. Place the lid on the pot and turn on the stove. Bring the water to a boil, but watch over it and as soon as the water actually reaches a boil, shut off the stove, but leave the pot sitting on the burner. The preceding is for an electric stove that will remain hot for a little while after shutting off power. If you use gas, allow the water to boil for one to two minutes before shutting off the stove. After a couple of hours when they’ve cooled, the jars can be removed and used.
The first time or two you use this technique, monitor the interior of your jars with a meat thermometer. Place it right into the center of the peat or compost. You want to make sure the center of the jar reaches at least 140F and stays there for an hour, but don’t allow it to exceed 170F. Depending on the thickness and capacity of your kettle and lid, you may need to adjust the above times slightly. This tek works because glass is an insulator, so the temperature inside the jars lags the water in the kettle. When I use the above procedure with 7 full quart jars in my All American 921, it comes out perfectly just as written. If you use a smaller pot, you may need to turn the stove on briefly at the ½ hour mark for a few minutes. rr
and no there's no benifit to letting anything germinate like grains
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  It doesn't matter what i think of you...all that matters is clean spawn I'm tired do me a favor
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mushrume man
Sadis Factory



Registered: 11/18/08
Posts: 375
Loc: PNW
Last seen: 2 years, 17 days
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Re: Pasteurization questions [Re: cronicr]
#19275878 - 12/14/13 06:05 PM (10 years, 1 month ago) |
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Will temp in the outer jars be the same as the inner jar? I wouldn't want to sterilize 6/7 jars. I only ask because I have seen others leave out the inner jar.
Also if using a bag to pasteurize it will be a bit longer I believe, FH says to wait til the internal temp raises about ten degrees then shut off stove and the temp will climb enough. "If your temperature stops climbing or doesn't reach the high end of temps, just turn the heat back on to medium for another 5-10 minutes. It should get it climbing again without going over."
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cronicr



Registered: 08/07/11
Posts: 61,436
Loc: Van Isle
Last seen: 2 years, 8 days
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the temps will be pretty well the same in all your jars provided you loaded them the same
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  It doesn't matter what i think of you...all that matters is clean spawn I'm tired do me a favor
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Valyr
Con nulla non si fa nulla.


Registered: 05/08/13
Posts: 381
Last seen: 6 years, 9 months
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Re: Pasteurization questions [Re: cronicr]
#19275897 - 12/14/13 06:11 PM (10 years, 1 month ago) |
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Quote:
cronicr said: Load the pre-moistened to field capacity casing mix, compost or manure into quart mason jars. Place a lid and/or foil over the top. Put the jars into a large covered pot of cold water, with the water filled to 2/3 to ¾ of the way up the jars. A large kettle or pressure cooker works well. If necessary, put a plate or some other weight over the jars to prevent them from floating. Make sure you have a spacer or dishtowel under the jars to prevent the direct heat of the stove burner or flame from cracking your jars. Place the lid on the pot and turn on the stove. Bring the water to a boil, but watch over it and as soon as the water actually reaches a boil, shut off the stove, but leave the pot sitting on the burner. The preceding is for an electric stove that will remain hot for a little while after shutting off power. If you use gas, allow the water to boil for one to two minutes before shutting off the stove. After a couple of hours when they’ve cooled, the jars can be removed and used.
This is exactly what I did with bags and was told no no by a tc lol. Guess thats cause I use bags not jars. Thats why i was wondering about the temp to shutoff at since its not at boil.
Thanks for the info though cronicr. So the soak doesnt make anything easier to kill on substrate like it does in grain spawn prep huh? Too bad. Thought it made sense it would. Glad I asked.
Yeah incase its pertinent I use oven bags with about 5qts of substrate per bag and pasteurize in either my pc or a 80qt stockpot about the same diameter. 14" diameter i beleive. One bag per pot though I could fit two I just dont like the crowding.
Edited by Valyr (12/14/13 06:12 PM)
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Valyr
Con nulla non si fa nulla.


Registered: 05/08/13
Posts: 381
Last seen: 6 years, 9 months
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Quote:
mushrume man said: Also if using a bag to pasteurize it will be a bit longer I believe, FH says to wait til the internal temp raises about ten degrees then shut off stove and the temp will climb enough. "If your temperature stops climbing or doesn't reach the high end of temps, just turn the heat back on to medium for another 5-10 minutes. It should get it climbing again without going over."
Sorry i didnt see this post before I posted my last response . Thanks Mush thats what I was wondering.
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