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pipazzo
Stranger

Registered: 04/11/19
Posts: 25
Last seen: 8 months, 19 days
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Bags sterilization time
#26743931 - 06/14/20 11:26 AM (3 years, 7 months ago) |
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Im using spawn bags and im in doubt of how long to sterilize at 15psi in my presto 23qt. Im loading the bags with approximately 2.kg of grain. I say approximately because i use a 1 liter bottle with which i fill to the top of it to simulate 1kg or 1lt of grain.
I have been working with jars for several years and understand that the sterilization time of a larger volume changes, that is what I want to clarify.
I was reading in this forum about "vent" the pc during sterilization. How is that?
Thank you!
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Thomsen



Registered: 09/27/19
Posts: 364
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Re: Bags sterilization time [Re: pipazzo]
#26743943 - 06/14/20 11:31 AM (3 years, 7 months ago) |
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The volume of 1kg grain is not equal to one 1kg water. If you wan't to have 2kg grains in each bag just weigh them. 
I PC my bags for 1,5 hour in a all American pc. 4x 2kg bags. Works like a charm.
I don't know about venting the PC while cooking. But you should let the pc press all air out, before you put on the valve.
Edited by Thomsen (06/14/20 11:34 AM)
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redeyesmj
werdo



Registered: 12/04/08
Posts: 4,117
Loc: Middle of kansas
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Re: Bags sterilization time [Re: Thomsen]
#26743975 - 06/14/20 11:51 AM (3 years, 7 months ago) |
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I let my full pc vent while heating until it has a strong steam flow for 10mins. Then I close the valve/put on weight and let it come up to 15psi and vent again for 10mins. After the second venting I let it return to 15psi and start my timer for 1.5hrs for bags 1hr for jars
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[/url]  “To be godless is probably the first step to innocence," he said, "to lose the sense of sin and subordination, the false grief for things supposed to be lost." So by innocence you mean not an absence of experience, but an absence of illusions." An absence of need for illusions," he said. "A love of and respect for what is right before your eyes.”― Anne Rice, The Vampire Lestat
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Thomsen



Registered: 09/27/19
Posts: 364
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Re: Bags sterilization time [Re: redeyesmj]
#26743984 - 06/14/20 11:56 AM (3 years, 7 months ago) |
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Quote:
redeyesmj said: After the second venting I let it return to 15psi and start my timer for 1.5hrs for bags 1hr for jars
What difference does this do?
Edited by Thomsen (06/14/20 11:57 AM)
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redeyesmj
werdo



Registered: 12/04/08
Posts: 4,117
Loc: Middle of kansas
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Re: Bags sterilization time [Re: Thomsen]
#26744121 - 06/14/20 01:34 PM (3 years, 7 months ago) |
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Quote:
Thomsen said:
Quote:
redeyesmj said: After the second venting I let it return to 15psi and start my timer for 1.5hrs for bags 1hr for jars
What difference does this do?
From the All American website
Quote:
Open the control valve by moving the lever to the upright position. It will take approximately 45 minutes to build pressure inside the sterilizer. This may vary based on the size of the sterilizer. Steam will be drawn from the bottom of the unit up through the air exhaust tube and out of the control valve. Steam must continually escape from the control valve for at least 5 minutes. Once this has occurred, close the valve and let the pressure build until the gauge reads in the “green” sterilization zone. Open the control valve a second time and vent the chamber an additional 3 to 5 minutes. The reason for the second venting is to avoid sterilizer failure from trapped air in the chamber, which may prevent the steam from permeating the items to be sterilized.
Basically its like you mentioned above about the pc pushing the air out, its just the procedure i use based on the proper procedure for using my sterilizer. Might be overkill for a pressure cooker.
-------------------- Where am I at?
[/url]  “To be godless is probably the first step to innocence," he said, "to lose the sense of sin and subordination, the false grief for things supposed to be lost." So by innocence you mean not an absence of experience, but an absence of illusions." An absence of need for illusions," he said. "A love of and respect for what is right before your eyes.”― Anne Rice, The Vampire Lestat
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natedawgnow
Rocky mountain hood rat



Registered: 02/09/15
Posts: 8,939
Loc: ation
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Re: Bags sterilization time [Re: Thomsen]
#26744132 - 06/14/20 01:38 PM (3 years, 7 months ago) |
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Quote:
Thomsen said: The volume of 1kg grain is not equal to one 1kg water. If you wan't to have 2kg grains in each bag just weigh them. 
I PC my bags for 1,5 hour in a all American pc. 4x 2kg bags. Works like a charm.
I don't know about venting the PC while cooking. But you should let the pc press all air out, before you put on the valve.
Can i see some tubs done with bags sterilized for 1.5hrs?
Not to sound like a dick but 90min is nowhere near enough time for grain bags. I sterilize bags for no less than 3hrs and I've been running lots of bags for years now.
1.5hrs at 15psi is barely enough time for jars
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Anastomosis
Stranger


Registered: 05/20/20
Posts: 227
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I run my bags (9 four quart bags in aa941) for 3.5 hours. 2.5 wasn't enough.
-------------------- "120mph with a trailer full of dogs and a truck full of drug addicts."
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natedawgnow
Rocky mountain hood rat



Registered: 02/09/15
Posts: 8,939
Loc: ation
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What that mother fucker said right there
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Thomsen



Registered: 09/27/19
Posts: 364
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Quote:
redeyesmj said: Might be overkill for a pressure cooker.
Maybe yeah. Could be overkill for a pc. Idk, I've never done it and rarely see contam in the jars or bags.
Quote:
natedawgnow said: Can i see some tubs done with bags sterilized for 1.5hrs?
1.5hrs at 15psi is barely enough time for jars
I have this Pic on my phone, of a tub I'm running right now. I use an all American 921 pc, so it's way smaller than the 941.
I have 10 other tubs looking like this one, 6 of them pinning so I'd say it's fine for my pc 

Edited by Thomsen (06/14/20 03:03 PM)
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natedawgnow
Rocky mountain hood rat



Registered: 02/09/15
Posts: 8,939
Loc: ation
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Re: Bags sterilization time [Re: Thomsen]
#26744304 - 06/14/20 03:28 PM (3 years, 7 months ago) |
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That tub is bacterial for sure. Not that it wont fruit but performance is likely to suffer because of it. Honestly if I were you I'd sterilize longer. I use an AA also.
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micelio
Song of Silence


Registered: 04/22/14
Posts: 1,547
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Thomsen



Registered: 09/27/19
Posts: 364
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Okay thanks. I'll PC longer next time. What tells you that it's bacterial? I though the rhizomorphic growth were a positive sign.
Sorry jacking your thread OP
Edited by Thomsen (06/14/20 03:48 PM)
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natedawgnow
Rocky mountain hood rat



Registered: 02/09/15
Posts: 8,939
Loc: ation
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Re: Bags sterilization time [Re: Thomsen]
#26744357 - 06/14/20 03:54 PM (3 years, 7 months ago) |
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That isnt exactly rhizo growth. I mean sure you could call it that, but that is a reaction to present bacteria 100%
Thick, spikey, looks a bit like melted ice cream in spots, those bulbs of myc in the first pic that sit above the sub, aerial myc, etc.
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natedawgnow
Rocky mountain hood rat



Registered: 02/09/15
Posts: 8,939
Loc: ation
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It's totally relevant to ops thread.
Op now knows why 1.5hrs isnt long enough for bags
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Thomsen



Registered: 09/27/19
Posts: 364
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Am I misunderstanding or are you calling the polyfill in the tub myc bulbs and/or aerial myc? If I misunderstood could you draw a circle where you see it?
Quote:
natedawgnow said: Op now knows why 1.5hrs isnt long enough for bags 
True that
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natedawgnow
Rocky mountain hood rat



Registered: 02/09/15
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Re: Bags sterilization time [Re: Thomsen]
#26744402 - 06/14/20 04:12 PM (3 years, 7 months ago) |
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No not the poly 
You can see that the myc is colonizing in what looks like raised little fluff balls on top of the sub.
You can see them in the 3rd pic also. Little compact balls of myc. Cant draw pics cause Im on my phone and dont know how haha.
Aerial myc is when myc grows up and above the substrate like fingers or clouds growing upward.
This is from bacterial grain

You can see the snowflake shaped blobs of myc growing above the sub. Tell tale bacteria.
A healthy sub will have myc that stays flush to the sub surface like so
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Hereigrow
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Registered: 01/04/20
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What about for 3lb grain bags in medium sized bags? I'm starting a cycle of millet hags right now with 1000g while millet and 400ml water in each. I was planning to run at 18psi for 2hr
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micelio
Song of Silence


Registered: 04/22/14
Posts: 1,547
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Re: Bags sterilization time [Re: Thomsen]
#26744422 - 06/14/20 04:28 PM (3 years, 7 months ago) |
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natedawgnow nails It good: melted ice cream in spot
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Zena
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Quote:
Anastomosis said: I run my bags (9 four quart bags in aa941) for 3.5 hours. 2.5 wasn't enough.
3.5 hours? Damn.
Safe to say I will never be doing any grain bags.
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natedawgnow
Rocky mountain hood rat



Registered: 02/09/15
Posts: 8,939
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Re: Bags sterilization time [Re: Zena]
#26744585 - 06/14/20 05:58 PM (3 years, 7 months ago) |
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Actually they are much more time efficient. Each bag makes 1 tub. I can do 6 bags at a time in my prestos and 4 in my AA.
So a single 3hr cook for me makes 10 tubs.
Alternatively, it takes 5 jars to make 1 full size tub. I can cook 10 jars in my presto and 7 in my AA. Thats 17 jars capable of making 3 tubs and 2 shoeboxes in a single 2hr cook.
10 tubs for 3hrs work is much better than 3 tubs for 2hrs work
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