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Offlinejonas
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I dont know man, that doesnt sound very safe!
    #3697185 - 01/29/05 08:31 AM (12 years, 8 months ago)

I was just reading a tek on straw and they mentioned some methods for treating the straw with other methods besides pasteurization and I've never heard of them. The link is posted below:
http://www.shroomery.org/index/par/23935


The practices I refer to are the following:

Lime water treatment:
Fill a clean, 45 gallon drum with fresh water and add 4 cups of Calcium hydroxide (hydrated lime) or Calcium oxide (quicklime) with stirring. Prepare straw as for hot water pasteurization above, then completely immerse in the lime water solution for about 2 hours. The water need not be hot, but very cold water does not seem to work well. Remove the bags to a clean place to drain, then spawn as for hot water pasteurized straw. This method is very economical as lime is cheap, but it is mild, and only good quality, clean straw should be used. Lime water will not kill grains, and sprouting grain may promote certain microbial pests. One batch of lime water will treat about 20 Kg. of straw.

Hypochlorite treatment:
Add 4 cups of household bleach solution to 45 gals. water to prepare a disinfectant solution that works about as well as lime water and is very economical. Immersion time and limitations are as for lime water. All the straw must be immersed at once. Serial treatment of a number of batches does not work well as the hypochlorite becomes depleted.

Formaldehyde and maneb treatment:
A recent article Mush.J.Tropics 7:67-75 (1987) describes an effective method for sanitizing wheat straw by immersion in dilute formaldehyde (500 ppm)/Maneb (75 ppm) solution. To prepare the solution, add 1 cup of 37% Formalin solution and 1/4 tsp. Maneb powder with stirring to 45 gals water. Immerse chopped straw in the above solution for 18 hours, drain and spawn as above. Zineb or Benomyl might substitute for Maneb in the same application.

Cold water immersion:
Fill a tub with clean, cold water. Prepare straw as for hot water, and completely immerse in the water for 5-7 days. The water should have a large surface area and have some opportunity to circulate by convection, to avoid anaerobic conditions. Use good quality straw. Supplementation prior to immersion is not recommended. At the end of the immersion period, remove the straw from the water, drain and spawn as above.



Never have I heard of anything like that. I'd assume it sterilizes it rather than pasteurizes but I don't know. Anyone ever tried any of those methods and if so how'd it work out?


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OfflineKaptKid
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Re: I dont know man, that doesnt sound very safe! [Re: jonas]
    #3697335 - 01/29/05 09:27 AM (12 years, 8 months ago)

I read the lime water treatment somewhere,guess they have there place.Myself, will stay with pastuerization.


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Offlinejonas
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Re: I dont know man, that doesnt sound very safe! [Re: KaptKid]
    #3697361 - 01/29/05 09:42 AM (12 years, 8 months ago)

Yeah, I'm just wondering if any of these are practical if I don't have a stove to use.


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OfflineMushroomFriend
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Re: I dont know man, that doesnt sound very safe! [Re: jonas]
    #3697447 - 01/29/05 10:12 AM (12 years, 8 months ago)

Jonas, you can also put the straw in a tub and pour hot water over it till it reaches the temp of 175F. Then the lid on and of you go.

I used a coolbox for that, it stayed 175F for many hours.


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Offlinejonas
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Re: I dont know man, that doesnt sound very safe! [Re: MushroomFriend]
    #3697487 - 01/29/05 10:29 AM (12 years, 8 months ago)

I like that idea man, good thinking. Thanks.


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OfflineMushroomFriend
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Re: I dont know man, that doesnt sound very safe! [Re: jonas]
    #3697505 - 01/29/05 10:35 AM (12 years, 8 months ago)

It works even! :grin:

When I pour boiling water in the strawbox the temp of the water will drop a lot at first. Cause the straw is much cooler then.
And so with every can you add, the temp raises.. :wink:

Be carefull though, too high (>185F) is not good!


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Offlinejonas
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Re: I dont know man, that doesnt sound very safe! [Re: MushroomFriend]
    #3697531 - 01/29/05 10:42 AM (12 years, 8 months ago)

Yup yup. I'll just use a trashcan and a laundry bag full of manure and straw. Pour hot water in there every now and then to maintain temps. I figure I'll just position the trashcan under a pole or something so I can just hang the bag directly over the trashcan to drain.


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OfflineRandolph_Carter
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Re: I dont know man, that doesnt sound very safe! [Re: jonas]
    #3697582 - 01/29/05 11:08 AM (12 years, 8 months ago)

The bleach solution works.
Haven't tried the others, no need.

Also, there's a good post down in the FAQ forum detailing a bulk grow.
You can mix the straw and poo and pasturize in a bag in an oven.

Saves mucking about with the water.


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"..all those molecules thrashing their kinky little tails, hot for destiny and the street."  Gibson


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Offlinejonas
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Re: I dont know man, that doesnt sound very safe! [Re: Randolph_Carter]
    #3698653 - 01/29/05 04:08 PM (12 years, 8 months ago)

True that but I don't have an oven of my own to use, and I'm not going to put manure/straw in their oven, even though I know it doesn't leak and doesn't make the oven smell, well, just a little like dirt. It's just out of respect ya know? So I figure even though maybe the other water methods are capable of making quite a mess, at least it's not going to be where food is and I can clean it up easily.


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Offlinescatmanrav
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Re: I dont know man, that doesnt sound very safe! [Re: jonas]
    #3698677 - 01/29/05 04:14 PM (12 years, 8 months ago)

Your gonna make a way bigger mess doing it wet then doing it dry in the oven in bags I'd bet..I mean its sealed when it goes in...if your gonna be wringing out shit with your hands squeezing pillow cases full of it, why wouldnt you just put in a bag and not wring out shit water from a pillow case?

Up to you though man :smile:


--------------------
"life is like a drop of rain getting closer and closer to falling into a lake, and then when you hit the lake there is no more rain drop, only the lake."

Growing with bags, start to finish (including my new grain and substrate prep)
Anyone looking to start bulk tubs/mono tubs/shotgun hybrids? Good tubs to use..
How I do grain (old still good tips)
Turn your closet into a fruiting chamber
Casing layer colonization and overlay


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OfflineKaptKid
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Re: I dont know man, that doesnt sound very safe! [Re: scatmanrav]
    #3698741 - 01/29/05 04:34 PM (12 years, 8 months ago)

Got a link to a tek or how do you do it?


--------------------
Child of the 60's, Tripping ever since.


:sun:


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Offlinejonas
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Re: I dont know man, that doesnt sound very safe! [Re: KaptKid]
    #3700395 - 01/30/05 01:07 AM (12 years, 8 months ago)

Yeah man, I definately feel that. It's just the fact that if I were to do the oven tek, it'd be in somebody else's oven. And while I agree with you that the oven tek is pretty clean compared to doing it wet, people who don't know anything about it just look at it like "No matter how clean you claim it'll be, I don't want shit in my oven". I wouldn't want to do that anyway, just because I wouldn't feel right about asking someone to let me do that in their oven. And there too I compromise security. What else would I be cooking poo in an oven for?

So yeah, the wet methods are more messy, but I'm fine with gettin a little dirty instead of risking security and having people think I'm nuts. And I don't plan on wringing out anything, I'm going to set up the trashcan under one of the supports running across the ceiling so when it's time to take it out and let it drain, I can just hang it and let it drip into the trashcan. I wouldn't doubt that a mesh laundry bag or whatever would allow for water to run off pretty easily.


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