Live Steam Box For Pasteurization

Discussion in 'MYCO-TEKS' started by Ozzy, Nov 3, 2011.

  1. Ozzy

    Ozzy Ggt's fanboi Moderator Mushroom Doctor Cannabis Doctor

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    LIVE STEAM BOX

    For less than 60 bucks you can pasteurize endless amounts of sub with no worries.
    002.jpg






    MATERIALS LIST
    • PC
      • 3/16th fuel line hose from autozone

      • 3/16ths barb fitting from hardware store, go to the brass fitting shelf in plumbing

      • 3-5 gallons of water

      • 2 meat thermometers, One for overall tub temp, and one for quick checking the center of bags.

      • A tote large enough to handle your max needs for pasteurization. I used a 50 gallon tote.

      • A wire shelf for the bags of sub to sit on that will allow steam to flow around the bag.

      • 3mil contractors bags work the best for this, as it makes it very easy to mix spawn in after the run and toss it around with out the bags ripping..Also the bags that are 1.4 mils generally melt a bit to themselves, which can make them difficult to open, also when aggressively mixing them I found that your fingers can poke holes in them and make a bit of a mess. Well worth the extra to get the 3mill IME


      Step 1:

      [​IMG]

      I went down to auto zone and picked up 10 feet of 3/16th fuel line hose. 8 bucks
      Step 2:

      [​IMG] 003 (2).jpg

      I got a large tote, and a 3/16th barbed fitting and drilled a small hole in the tote to accept the fitting 20.00 bucks

      Step 3:

      [​IMG] 005.jpg

      Took an old meat thermometer and rtv-ed it to the lid.(after drilling the small hole for it to fit in to first) ((OPTIONAL))

      Step 4:

      [​IMG]

      Put 3gallons for a small load and 4 1/2gallons of water for a large load in the PC. This is the cool part because you don't have to refill it.

      Step 5:

      [​IMG][​IMG]

      Put lid on the pc

      Step 6:

      [​IMG] 012 (3).jpg

      Hooked up the box to the PC via the fuel line hose.

      Step 7:
      • You want to space the bags with jar lids so the steam can penetrate all around them.

      • Run it to get up to temp and then pasteurize for the allotted time. It usually takes about 5-6 hrs with a full load and 2-3 with a small load. That's 145lbs of substrate, or 125 qts.

      • the PC will run at 3 of 4 psi which is perfectly safe.

        debianlinux said:
        The 3psi is just the load imposed by the constriction of the tubing and its orifices. As long as the pathway from the PC into the chamber is not obstructed no dangerous pressures should develop. 3psi literally represents the pressure differential that is visible when steam moves from the PC into the tub. You would achieve considerably higher pressure to put your mouth on one end and lightly blow with the other end of the tubing still being open.

      • You can cover it in blankets to regulate the temps and remove if it gets above where your comfortable with.

      • This is a beautiful way to pasteurize bulk in your kitchen. Works like a charm every time.

      • At some point I will convert a cooler and post those mods here as an alternative.

      • spot check all the bags with a thermometer through the process a few times till you now what to expect from your set up. Once you hit 140 degrees back the insulators off and start your timer. I pasteurizer for 2 hours once I hit the temp. When done properly your bags will not get higher than 165 degrees. So you hit the sweet spot every time.

      • I run my bags at 15qts per bag in these so 1 bag= 1 tub, squeeze out all the air and zip-tie the bags before loading. Tying knots LOOSE KNOTS works in pinch, but twisting and zip tying is much easier and less time consuming to get done. Time is a factor when doing these amounts, so the less time you spend dicking around the better.

      • You can squeeze in 2 layers in these, just make sure you have space between all the bags so they all heat evenly. I prefer to do one layer at a time though.


      Here it is at the end of the run

      [​IMG]

      I would like to be able to do away with the blanket insulators, but It works like this without having to spend any money or ruining one of my fishin coolers.

      I love this machine so much I built another and doubled my capacity.

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    Last edited: Nov 4, 2011
    oneeyesun and MB3 like this.
  2. OoBYCoO

    OoBYCoO Super Moderator Moderator Mushroom Doctor

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  3. steelmonkey

    steelmonkey Master Mycologist Mushroom Doctor

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    Great write up Oz!
     
  4. eLShaMukO

    eLShaMukO Moderator Moderator Mushroom Doctor

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    this is great info

    thanks Ozzy :D
     
  5. Professor PinHead

    Professor PinHead Lost in the Tek.... Administrator Mushroom Doctor Cannabis Doctor Supporter

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    I'm a :fan: ........
     
  6. lennon

    lennon Active Member

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    wicked !! great write up man , pasturization for the nation !!

    gonna treat myself to one this crimbo !! nice one !!!!!
     
  7. PE-n-hed

    PE-n-hed Well-Known Member Moderator Mushroom Doctor Cannabis Doctor Supporter

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    got to have it.............you rock bro
     
    Last edited: Feb 21, 2013
  8. Weller

    Weller Student of Nature Moderator Cannabis Doctor Cacti Doctor

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    Good stuff Ozzy.
     
  9. PE-n-hed

    PE-n-hed Well-Known Member Moderator Mushroom Doctor Cannabis Doctor Supporter

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    putting mine together tonight......thanx for the write up Oz man....i did not have to think about it,just do it and know ...
     
  10. Terry M

    Terry M Member Mushroom Doctor

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    Wonderful! Gonna make one of these for oyster straw logs. I hate all the hot water for water bath pasteurization. And I'll get another 50 gallon tote for doing 24 hour, outdoor cold-water soaking of the straw.
     
  11. PE-n-hed

    PE-n-hed Well-Known Member Moderator Mushroom Doctor Cannabis Doctor Supporter

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    ran it today......awesome!!!!!!!
     
  12. Terry M

    Terry M Member Mushroom Doctor

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    I got most of what I need to make this yesterday. I bought two 50-gallon totes from Walmart. Gonna use the second one for outdoor cold-water pre-pasteurization straw soaking. I'll use this almost exclusively for straw pasteurization. I can't wait to start using it!
     
  13. rogue

    rogue ♥ Hooked on Mycelium ♥ Moderator Mushroom Doctor Supporter

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    pix?
     
  14. Terry M

    Terry M Member Mushroom Doctor

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    Wow, was that ever easy to make! Took me less than half and hour, and I am quite possibly the world's worst RTV silicone applier. And of course I didn't have the right size drill bits for thermometer and hose fitting, but I sort of rolled around the next lower size bits in the plastic, making godawful looking holes.

    But none of my messy work even showed, being hidden behind the thermometer, and on the hose fitting sealant just on the inside of the box. Tomorrow, after the sealant has cured, I'll crank it up. I got 3 cake cooling racks at Walmart which fit nicely at the bottom of the bin. 10 feet of tubing from a random auto parts supply store was around a buck a foot. I already had a suitable barb fitting. I'm just waiting on some burlap bags, since I'm pasteurizing straw.
     
  15. Jeff

    Jeff Well-Known Member Moderator Mushroom Doctor Supporter

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    Great idea. I have a mash ton that I used to use for all grain brewing. This is perfect for reuse! Thanks.
     
  16. OoBYCoO

    OoBYCoO Super Moderator Moderator Mushroom Doctor

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    :welcome: to Myco-Tek Jeff!!!
     
  17. Terry M

    Terry M Member Mushroom Doctor

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    I just started mine up empty for a trial run. Great!!! I got it up to 160 degrees, and everything is holding tight. :super:

    One glitch to watch out for. The hose popped off the top of the PC because I hadn't pushed it far enough down the vent port. The hose end becomes more flexible when hot, so I had no trouble using a potholder to then push it all the way down. When it's pushed down all the way, it holds solid.

    Regulating the stove heat is the same as for normal pressure operation, except you are checking a temperature gauge instead of a pressure gauge. By the way, my PC pressure reads about 2.5 PSI to maintain the correct bin temperature.

    Gonna chop and soak some straw today, and pasteurize it tomorrow. I've got my burlap bags for holding the straw.
     
  18. rogue

    rogue ♥ Hooked on Mycelium ♥ Moderator Mushroom Doctor Supporter

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    Sounds great. I can see it now, soon we are all going to have steam boxes running :) Thanks Terry.

    BTW, where did you get your burlap bags from? Are they clean of oils?
     
  19. Jeff

    Jeff Well-Known Member Moderator Mushroom Doctor Supporter

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    I thought I would post a few pics of the steam box I made from the inspiration of the OP. Like I said earlier, I thought this would be a good use for the mash tun that I had sitting in the garage. Way back when we used to make all grain beer. After the rug rat managed to knock the bubbler off of a couple of batches I kind of scrapped the hobby. BTW this was a good oportunity for an I told you so to the wife, I knew there was a reason I never get rid of anything.

    Anyway, a ten gallon drink cooler with the dispenser removed and replaced with a barbed fitting.
    [​IMG]

    I have got a manifold inside originally design to extract wort. Seems to work equally well for distributing steam.
    [​IMG]

    Thermometer through the top.
    [​IMG]
    [​IMG]

    Did a dry run and the steam is distributing evenly. I have some oysters that will be ready by friday. I will give it a live run then.

    Great site. Thanks for the info, I do love reusing stuff I already have on hand.

    Oh and thanks for the welcome OoBYCoO!
     
  20. rogue

    rogue ♥ Hooked on Mycelium ♥ Moderator Mushroom Doctor Supporter

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    Well done. It's catching on :woot: