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Offlinellopez00
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Sterilize or Pasteurize?
    #4685796 - 09/20/05 12:57 PM (11 years, 2 months ago)

I'm preparing 12 1/2 pint shakeable pf jars in a few days but I will use poo/straw/verm instead of the original pf recipes. The poo is a mixture of horse and cow poo off of a large pile out on a ranch. I'll be using a poly-fil filter instead of the dry verm layer on top. Should I still sterilize these jars at 15 psi for an hour or should I pasteurize them at 170* for an hour, considering that it is poo and not BRF or any other flour?


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OfflinePixie1420
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Re: Sterilize or Pasteurize? [Re: llopez00]
    #4685852 - 09/20/05 01:23 PM (11 years, 2 months ago)

I did exactly the same, but sterilized and it worked fine. Oh I added 10 teaspoons of BRF to the poo/verm mix. Didnt use straw tho.


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Offlinellopez00
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Re: Sterilize or Pasteurize? [Re: Pixie1420]
    #4685882 - 09/20/05 01:39 PM (11 years, 2 months ago)

So would pasteurizing be okay too when using poo as spawn? I would think it would considering that poo is pasteurized when used as a substrate. I don't mind sterilizing but pasteurizing takes less time for me. My burners take forever to get the pressure cooker to 15 psi.


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Offlinelosfreddy
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Re: Sterilize or Pasteurize? [Re: llopez00]
    #4685926 - 09/20/05 02:03 PM (11 years, 2 months ago)

the poo realy stinks up the house. what i did was threw an oat meal cookie in the microwave for 2 min. it smoked up the entire kitchen, but it covered up the smell very well. then both smells go away pretty quick.


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OfflineHippieChick
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Re: Sterilize or Pasteurize? [Re: llopez00]
    #4685964 - 09/20/05 02:21 PM (11 years, 2 months ago)

If I where loading it in jars like you are, I would go ahead and sterilize.

As far as smell, I just did 100 quarts of 50% Poo, 25% WBS and 25% Rye, I didn't smell a thing.

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Offlinellopez00
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Re: Sterilize or Pasteurize? [Re: HippieChick]
    #4685993 - 09/20/05 02:37 PM (11 years, 2 months ago)

So in jars, sterilize, and in pillow cases, pasteurize? I still don't understand why sterilizing is better for spawn than for substrate though. I have read that poo in general benefits better from pasteurizing and is more contam prone when sterilized. Is this not true even if the poo is in jars? Wouldn't sterilizing poo in the jars be more contam prone than pasteurizing poo in the jars?


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InvisibleRoadkill
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Re: Sterilize or Pasteurize? [Re: llopez00]
    #4686015 - 09/20/05 02:43 PM (11 years, 2 months ago)

you are a little confused...


you would only sterilize horse poo when using it as a substrate in jars.


you pastuerize horse poo when making up bulk substrate...which you spawn(mix) colonized substrate into.


sterilized horse poo used as a bulk substrate contams easier than pastuerized horse poo.


tc

*edited to reword*


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Edited by Roadkill (09/20/05 02:44 PM)


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Offlinepuwtrip
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Re: Sterilize or Pasteurize? [Re: llopez00]
    #4686059 - 09/20/05 02:51 PM (11 years, 2 months ago)

that is true; sterilized is more contam prone than pasturized. however, the reason it would be better to sterilize is that generally, when preparing spawn, the mycelium takes a long while to colonize the jar. so, if there are any cantams there, they will not be killed during pasturization and will have a chance to infect your jar.

by sterilizing, you kill everything and only inoculate your goodie spores into the jar. ideally, with a filter in place, you have a very small chance to contaminate.

the reason this doesn't matter in bulk runs is that the spawn will quickly colonize the substrate within a few days leaving no time for badies to take foot.


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Offlinellopez00
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Re: Sterilize or Pasteurize? [Re: puwtrip]
    #4686263 - 09/20/05 03:59 PM (11 years, 2 months ago)

Oh okay, I understand now. Either way would have been doable for me, I just wanted to know the proper way. Thanks a lot for all the help.


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