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Pasteurizing in oven bags...


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#1 cybersludge

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Posted 11 June 2019 - 10:49 AM

Hello,
Did quite a bit of searching on this, found very little to answer these specific questions.
My specific questions are;
When using an oven bag/ myco bag to pasteurize should a filter patch be used or not?
Does the substrate need air to properly pasteurize or not?
Should the bag be sealed or not?
Is it best to pre-soak dung/ straw for ~24 hrs. to pre-germinate any contams, or not?

Thanks,
cybersludge



#2 jkdeth

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Posted 11 June 2019 - 07:15 PM

What exactly are you trying to do?

No, you never need to soak substrate overnight.

If you have a mycobag, it has a filter and it will do fine.

If you have an oven bag, it will pastuerize fine without one.
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#3 NewMycoDisciple

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Posted 11 June 2019 - 08:18 PM

I mean if you got the resources, PC it right? Get some half gallon jars and just PC the substrate the night before you intend to mess with it.

Not an expert, dont take any of my advise unless the elders around here say so

Edited by NewMycoDisciple, 11 June 2019 - 08:19 PM.


#4 MycoBabe

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Posted 11 June 2019 - 08:45 PM

Pressure cookers sterilize.... pasteurization is different. I used to boil water/ vits then poor on top of the coir/mix into a tub, put the lid on immediately & let it cool like that overnight. I now do the same, but store the excess in myco bags/ or turkey bags. I toss them in the oven for a couple hours on low.... I haven’t had any contamination yet, and I save time. Port or no port, watch the bag.... gases may build up. Sometimes they pop, sometimes not. I give a little cusion on the tightness of the seal.
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#5 wharfrat

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Posted 11 June 2019 - 09:25 PM

Hello,
Did quite a bit of searching on this, found very little to answer these specific questions.
My specific questions are;
When using an oven bag/ myco bag to pasteurize should a filter patch be used or not?
Does the substrate need air to properly pasteurize or not?
Should the bag be sealed or not?
Is it best to pre-soak dung/ straw for ~24 hrs. to pre-germinate any contams, or not?

Thanks,
cybersludge

 

a myco bag with a filter is the best way. you can use an oven bag, just tie the top loose enough so it don't pop when expanding. I would not grow in an oven bag without some type of filter for gas exchange. you can pasteurize in the bag, then transfer to a tub with your spawn, in a sterile environment. I would not soak the sub, you want it to be just wet enough that when you squeeze a handful, only a little water drips out. 


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#6 roc

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Posted 11 June 2019 - 10:58 PM

One can use an oven bag without a filter and pasteurize a substrate in an oven.

 

No soak needed when pasteurizing a substrate.

The soak to germinate the nasties would be for grain spawn before sterilization.


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#7 cybersludge

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Posted 12 June 2019 - 04:57 AM

Pretty much what i was thinking.
Previously I have only done the pillowcase tek , but can't do that one now,  :( .
Never had any intention of sterilizing/ PCing  the substrate.
I mostly wanted to know is oxygen/ air is needed  to pasteurize, therefore the filter patch or no filter patch question.


Thanks all....   :biggrin:


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#8 wharfrat

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Posted 12 June 2019 - 04:53 PM

Pretty much what i was thinking.
Previously I have only done the pillowcase tek , but can't do that one now,  :( .
Never had any intention of sterilizing/ PCing  the substrate.
I mostly wanted to know is oxygen/ air is needed  to pasteurize, therefore the filter patch or no filter patch question.


Thanks all....   :biggrin:

 

one more post and you are free to roam  :biggrin:


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