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North Spore Shop: Bulk Substrate, North Spore Mushroom Grow Kits & Cultivation Supplies

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OfflineType J Negative
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Registered: 09/11/13
Posts: 16
Last seen: 9 years, 9 months
Rapidly cooling the substrate after the pasteurization
    #18893796 - 09/26/13 12:24 PM (10 years, 4 months ago)

I have seen Frank H mention a few times that PROPER pasteurization involves rapidly cooling the substrate after it has went through the process (140-170 degrees @ 60-90 min)

A friend loads QT jars with his substrate and uses his PC for the pasteurization process, and after 60 minutes shuts off the stove and lets things naturally cool down to the point that the meat thermo goes all the way back down to what it’s at when it’s not in use...and sometimes leaves them in the PC a little bit longer after that (don’t ask why, I don’t know...)

After its cooled down in the PC for awhile (sometimes overnight), he uses them to load his 6qt or 12qt dubs....and hasn’t had a contam issue yet.

So is this truly necessary...or just optimal?  After the timer goes off should they just be pulled out of the PC and set on the counter or in a box or something?


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InvisibleFrankHorrigan
The Inquisition
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Registered: 01/04/11
Posts: 10,573
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Re: Rapidly cooling the substrate after the pasteurization [Re: Type J Negative]
    #18893813 - 09/26/13 12:29 PM (10 years, 4 months ago)

Is he using coir?

It doesn't always cause an issue but it's poor practice to leave the substrate at pasteurizing temps for an extended period of time. You start to kill your "good" bacteria.

Proper pasteurization is 140-160F for 60 minutes, then cooled rapidly (which is to say, take it out of the pasteurization bath and let it sit at room temp overnight).


--------------------

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You should take a look. :hehehe:


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OfflineType J Negative
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Registered: 09/11/13
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Last seen: 9 years, 9 months
Re: Rapidly cooling the substrate after the pasteurization [Re: FrankHorrigan]
    #18893850 - 09/26/13 12:39 PM (10 years, 4 months ago)

Quote:

FrankHorrigan said:
Is he using coir?






It varies...sometimes its HMC, sometimes coir and sometimes its a mixture of the two (trying to what works the best).  And they always have the correct amount of verm and gypsum added as well..

Quote:

FrankHorrigan said:

Proper pasteurization is 140-160F for 60 minutes




My bad, thought it was 140-170  :facepalm3:


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InvisibleFrankHorrigan
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Re: Rapidly cooling the substrate after the pasteurization [Re: Type J Negative]
    #18893867 - 09/26/13 12:43 PM (10 years, 4 months ago)

170 is not going to hurt anything for a few minutes but go any higher and you start to partially sterilize the substrate. 160F is a "safe" high range for the temp.

For the cooling, just remove the jars from the bath when the timer is up, if you are worried about it. Sounds like you're doing alright so far :thumbup:


--------------------

Yes, you can bump my old threads with a question.
Here is how I get things done.
You should take a look. :hehehe:


Frank's tips and tricks. Updated on 3/21/14
AMU- Get an answer here -AMU


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Invisible36fuckin5
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Registered: 08/11/03
Posts: 12,081
Loc: Diving into Mystical Territori...
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Re: Rapidly cooling the substrate after the pasteurization [Re: FrankHorrigan]
    #18894566 - 09/26/13 03:26 PM (10 years, 4 months ago)

I do a bucket pasteurization, and I'll dump my substrate into my tub after 90 minutes, then mix it up while hot until it cools. Usually takes about 15-20 minutes that way before I can spawn.


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Redd Foxx said:
If you're offended I don't give a shit and don't come see me no more.

Pat The Bunny said:
A punk rock song won't ever change the world, but I can tell you about a couple that changed me.

bodhisatta said:
i recommend common sense and figuring it out.

These are the TEKs I use. They're all as cheap and easy as possible, just like your mom.


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OfflineType J Negative
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Registered: 09/11/13
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Re: Rapidly cooling the substrate after the pasteurization [Re: FrankHorrigan]
    #18894655 - 09/26/13 03:44 PM (10 years, 4 months ago)

Quote:

FrankHorrigan said:
170 is not going to hurt anything for a few minutes but go any higher and you start to partially sterilize the substrate. 160F is a "safe" high range for the temp.

For the cooling, just remove the jars from the bath when the timer is up, if you are worried about it. Sounds like you're doing alright so far :thumbup:




Good to know........thanks for the fast reply and fountain of information...most of my bookmarks are from your teks
:bow2:


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OfflineType J Negative
Down the rabbit hole


Registered: 09/11/13
Posts: 16
Last seen: 9 years, 9 months
Re: Rapidly cooling the substrate after the pasteurization [Re: 36fuckin5]
    #18894670 - 09/26/13 03:47 PM (10 years, 4 months ago)

Quote:

36fuckin5 said:
I do a bucket pasteurization, and I'll dump my substrate into my tub after 90 minutes, then mix it up while hot until it cools. Usually takes about 15-20 minutes that way before I can spawn.





Ive heard about the "bucket tek" 
im sure it works for some....but ill never try it because its not TRUE pasteurization..
id rather just do the extra work and KNOW im all good


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Invisible36fuckin5
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Registered: 08/11/03
Posts: 12,081
Loc: Diving into Mystical Territori...
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Re: Rapidly cooling the substrate after the pasteurization [Re: Type J Negative]
    #18894724 - 09/26/13 03:59 PM (10 years, 4 months ago)

If you follow Damion5050 to a T, then yeah it's not true pasteurization. If you use water at 175-180F then it is.

Trust me, if it weren't real pasteurization, I'd never see a fruit in my dirty-ass house.


--------------------
Redd Foxx said:
If you're offended I don't give a shit and don't come see me no more.

Pat The Bunny said:
A punk rock song won't ever change the world, but I can tell you about a couple that changed me.

bodhisatta said:
i recommend common sense and figuring it out.

These are the TEKs I use. They're all as cheap and easy as possible, just like your mom.


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OfflineMsAngelique
Your Mantra
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Registered: 06/17/13
Posts: 147
Loc: North Carolina, USA
Last seen: 10 years, 20 days
Re: Rapidly cooling the substrate after the pasteurization [Re: FrankHorrigan]
    #18894821 - 09/26/13 04:23 PM (10 years, 4 months ago)

Quote:

FrankHorrigan said:
170 is not going to hurt anything for a few minutes but go any higher and you start to partially sterilize the substrate. 160F is a "safe" high range for the temp.

For the cooling, just remove the jars from the bath when the timer is up, if you are worried about it. Sounds like you're doing alright so far :thumbup:




Frank, I have a question about this that I apologize if it has been addressed elsewhere.  I completely understand your point of it should not be at or above 170 for more than a few minutes or you start to lose the good stuff.  Lately when I was pasteurizing some substrate I followed the tek...in that my temp started off in the low 80's. I heated until my inserted digital thermometer went up about 15-20 degrees and then I turned the stove off and left it sitting.  Well...I swear both my PCs of jars went to about 170-175 on their own and stayed there for 15-30 mins.  I was freaking out trying to figure out how in world to cool them.  On one I actually tried adding cooler water to bring it down. But I did not want to pull them out because they had not been in there the full 60 mins required. So, my question is...what IS the best way to get it under 170 if it goes that high for too long to keep from ruining your substrate? Or is it just a lost cause and I might need to turn off after only 15 degrees of heating maybe?  Thanks...appreciate any advice.


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Invisible36fuckin5
Alchemycologist


Registered: 08/11/03
Posts: 12,081
Loc: Diving into Mystical Territori...
Trusted Cultivator
Re: Rapidly cooling the substrate after the pasteurization [Re: MsAngelique]
    #18894833 - 09/26/13 04:25 PM (10 years, 4 months ago)

Just pull it out of the water if it gets too hot. The internal temp is what matters.


--------------------
Redd Foxx said:
If you're offended I don't give a shit and don't come see me no more.

Pat The Bunny said:
A punk rock song won't ever change the world, but I can tell you about a couple that changed me.

bodhisatta said:
i recommend common sense and figuring it out.

These are the TEKs I use. They're all as cheap and easy as possible, just like your mom.


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OfflineMsAngelique
Your Mantra
Female

Registered: 06/17/13
Posts: 147
Loc: North Carolina, USA
Last seen: 10 years, 20 days
Re: Rapidly cooling the substrate after the pasteurization [Re: 36fuckin5]
    #18894884 - 09/26/13 04:37 PM (10 years, 4 months ago)

Quote:

36fuckin5 said:
Just pull it out of the water if it gets too hot. The internal temp is what matters.




36 thank you for the feedback.  In my newness I thought I needed to leave them in the PC for the full 60 mins!  Good to know!


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North Spore Shop: Bulk Substrate, North Spore Mushroom Grow Kits & Cultivation Supplies


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