Solar substrate pasteurization

Discussion in 'EDIBLE & MEDICINAL MUSHROOMS' started by seaspray, Mar 26, 2016.

  1. seaspray

    seaspray Member

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    Hello! Has anyone tried solar substrate pasteurization using a fridge like this: https://mycotopia.net/uploads/monthly_04_2006/post-4529-13818500211.jpg ? I live in Jamaica and am a newbie. I'm hoping to pasteurize a substrate made of sugarcane bagasse and molasses to grow shiitakes. Would I need to add water to the bottom of the fridge to create steam? Or would the dry heat be enough? I hope to have the inside and outside of the fridge painted black and may purchase a Fresnel lens to concentrate the sun's rays (though it should be able to get pretty hot without much help).

    Thank you in advance for any advice or tips!
     
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  2. Trout

    Trout Closet Mycologist, Literaly! Mushroom Doctor

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    Should work. I did it with a tub and large bubble wrap.
     
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  3. seaspray

    seaspray Member

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    Great thanks for your reply. Did you add water to the bottom of the tab? Or pastuerize dry?
     
  4. Trout

    Trout Closet Mycologist, Literaly! Mushroom Doctor

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    Pre moistened straw no additional water.
     
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  5. seaspray

    seaspray Member

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    Thanks for your reply.

    Did you haul the tub to your sterile room to cool? Or should I spray the outside of each bag with alcohol when transferred from the fridge outside to the room inside?

    I'm unclear about how to ensure the substrate remains sterile whilst/after being transferred into the sterile room.

    Thanks so much for your insight and help.
     
  6. Ratatoskr

    Ratatoskr Plenipotentiary Supporter

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    you are only pasteurizing the substrate in there right?
     
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  7. seaspray

    seaspray Member

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    Hi there,

    Thanks for your reply.

    I'm a newbie and so am trying to follow GGMM.

    I believe I would have packed the substrate into bags, and would just be pasteurizing the substrate in the fridge. I was just wondering how to keep this substrate sterile.

    I plan on sterilizing everything else using a pressure cooker.

    Does this make sense? Is this right?

    Thanks.
     
  8. Ratatoskr

    Ratatoskr Plenipotentiary Supporter

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    if you are only pasteurizing the substrate then you don't need to keep them sterile. what substrate are you planing on using? what mushrooms are you planning on growing? are you going to supplement your substrate?
     
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  9. seaspray

    seaspray Member

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    Great. Thanks for your reply. Hoping to grow shiitakes (Aloha Medicinals 75) on a substrate of sugarcane bagasse, molasses and rice bran. I was trying to follow this paper: http://www.scielo.br/pdf/bjm/v34n1/arq13.pdf. Am I on the right track?

    Are there better warm weather shiitake strains that I should consider?

    Thanks again!
     
  10. Ratatoskr

    Ratatoskr Plenipotentiary Supporter

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    if you are going to enrich with bran you are going to want to sterilize. if you use the sugarcane without supplementing it pasteurization will be fine. you will see higher yields with supplementation but if you don't sterilize you will see a lot more contamination. maybe try pink or yellow oysters on non supplemented substrate that you pasteurize. i am suggesting hot weather oysters because, one you live in Jamaica, and two you will see results sooner with the oysters.
     
    Last edited: Mar 28, 2016
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  11. seaspray

    seaspray Member

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    Thanks so much for your help!



    I'll look into getting the oysters.



    Are you aware of any ways of bulk sterilizing substrate relatively inexpensively so I can use the bran for the shiitakes? It doesn't seem like the pressure cooker will not hold enough.



    Again thanks for your help!
     
  12. Ratatoskr

    Ratatoskr Plenipotentiary Supporter

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  13. seaspray

    seaspray Member

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    Fantastic. Thank you very much!
     
  14. Ratatoskr

    Ratatoskr Plenipotentiary Supporter

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    ive never built one or used one so i have no experience. however i do think that many many people use them right along with their flow hoods and cement mixers and pond foggers, alas, no room for that in my apartment :blue:
     
    Last edited: Mar 28, 2016
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  15. seaspray

    seaspray Member

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    It's pretty remarkable how ingenious at home mycologists are. I'm amazed by how many everyday items can be re-purposed for this. at so many different scales. Thanks again!
     
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  16. Dirk_Diggler

    Dirk_Diggler Active Member

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    I've been using a RR style 55 gallon drum 'super pasteurizer' / sterilizer.

    Done a few batches, and all went great.

    Might find a pic if you want to see it.

    cheers
     
  17. seaspray

    seaspray Member

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    Thanks for your reply. I'd love to see your setup if you have photographs. Thank you!
     
  18. FallenOak

    FallenOak Mushroom Cultivator Mushroom Doctor

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  19. seaspray

    seaspray Member

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    Wonderful! Thank you for sharing.