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OfflineVroomerMcZoomers
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Registered: 08/11/17
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Re: Issues with Contamination when going to grain from Agar [Re: RogerRabbit]
    #25563140 - 10/24/18 11:53 AM (6 years, 2 months ago)

What's your opinion about the auto air vents you find on a lot of cookers?  Are they effective or should you continue to vent even after they pop up?



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Either you repeat the same conventional doctrines everybody is saying, or else you say something true, and it will sound like it's from Neptune.  -Noam Chomsky

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Invisiblepablokabute
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Re: Issues with Contamination when going to grain from Agar [Re: RogerRabbit]
    #25563149 - 10/24/18 11:56 AM (6 years, 2 months ago)

Quote:

RogerRabbit said:
Quote:

pablokabute said:
2hrs @ 15psi gives me bacterial contam even in the unopened control jars. 2hrs @ 20 psi gives me peace of mind, not to mention perfect sterilization. ive wasted around 50lbs of grains before i made the move.




It sounds like you're failing to allow steam to escape for several minutes before putting on the weight or closing the toggle.  It is very important to get all the air out of the PC and replace it with steam.  Otherwise, you're building air pressure rather than steam pressure and the temp will be much lower.

After proper venting, 15 psi for 90 minutes is going to sterilize the grains sufficiently to get them colonized, assuming quart/liter jars.  Use two hours for larger spawn bags, and keep them separated so steam can pass between, under and over each bag.
RR




I do 10mins on high heat before I close the toggle. Im thinking my gauge is fucked cuz when I made this move, all my problems disappeared, anyway, Im using whole oats bought from a feeds supply store, i pack them in pint jars and my pressure cooker packed to the brim, I can fit 24 jars per batch in my AA921


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Offlineteladi
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Registered: 06/27/17
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Re: Issues with Contamination when going to grain from Agar [Re: VroomerMcZoomers]
    #25563239 - 10/24/18 12:29 PM (6 years, 2 months ago)

Quote:

VroomerMcZoomers said:
What's your opinion about the auto air vents you find on a lot of cookers?  Are they effective or should you continue to vent even after they pop up?






That isn't an auto-vent. It's a pressure indicator and safety feature preventing your from opening the lid while at pressure.

A PC can be at pressure, but still not vented correctly.


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InvisibleCaps McGee
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Registered: 10/28/17
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Re: Issues with Contamination when going to grain from Agar [Re: teladi]
    #25563302 - 10/24/18 12:43 PM (6 years, 2 months ago)

Are you getting mold, or bacteria first?  If it's bacteria,  could simply be prepping too wet  :shrug:

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OfflineVroomerMcZoomers
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Re: Issues with Contamination when going to grain from Agar [Re: teladi]
    #25563316 - 10/24/18 12:45 PM (6 years, 2 months ago)



--------------------
 

Either you repeat the same conventional doctrines everybody is saying, or else you say something true, and it will sound like it's from Neptune.  -Noam Chomsky

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InvisibleMycolorado
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Re: Issues with Contamination when going to grain from Agar [Re: VroomerMcZoomers]
    #25563342 - 10/24/18 12:51 PM (6 years, 2 months ago)

Obviously it’s a vent as it vents.  It also states it’s a cover lock.  Either way, one should still vent steam for 10 min or so, even if the auto vent/cover lock has raised before the 10 min is up.

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InvisibleCaps McGee
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Re: Issues with Contamination when going to grain from Agar [Re: VroomerMcZoomers]
    #25563347 - 10/24/18 12:52 PM (6 years, 2 months ago)

I think air can still get caught in though, the valve wouldn't know the difference between air and steam, it's just pressure activated

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Offlineteladi
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Re: Issues with Contamination when going to grain from Agar [Re: VroomerMcZoomers]
    #25563357 - 10/24/18 12:54 PM (6 years, 2 months ago)

Read later on in the manual, page 7:

Quote:


7. Exhaust air from the canner and jars by adjusting heat to a relatively high setting to obtain a free flow of steam from the vent pipe. Consult the instruction book which accompanied your range for recommended heat setting. Reduce heat to maintain a moderate steam flow. Allow steam to flow for 10 minutes.





Also, from page 5:

Quote:


When the cover is rotated to the closed position, the air vent/cover lock passes under the locking bracket. When the handles are aligned, one over the other, the pressure regulator is placed on the vent pipe, and heat is applied, pressure will begin to build within the canner.At this point, the air vent/cover lock lifts and locks the unit. The cover will remain locked as long as there is pressure in the canner. When pressure is completely reduced, the air vent/cover lock drops allowing the canner to be opened (Fig. K).





It will not automatically vent all the air in the PC. It does vent, and it will automatically lock, but its purpose isn't just to vent.


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OfflineVroomerMcZoomers
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Re: Issues with Contamination when going to grain from Agar [Re: Caps McGee]
    #25563390 - 10/24/18 01:00 PM (6 years, 2 months ago)

Always vent for a few minutes longer after that thing pops up.  10 to be sure.  Unless some precise information comes along indicating otherwise.


Edited by VroomerMcZoomers (10/24/18 01:22 PM)

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InvisibleTookitooki
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Re: Issues with Contamination when going to grain from Agar [Re: VroomerMcZoomers]
    #25564027 - 10/24/18 04:27 PM (6 years, 2 months ago)

15 mins from the time it pops.  Never done me wrong.

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OfflineBigGreenMat
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Re: Issues with Contamination when going to grain from Agar [Re: Tookitooki]
    #25564430 - 10/24/18 06:55 PM (6 years, 2 months ago)

Quote:

Tookitooki said:
If you can't load a video of your SAB session so we can help figure out what or where it's going wrong, try your best to give us details of your SAB procedures. What are you doing with your lids when you are dropping the ager in to the jar.  You setting it down or holding it.

I run my lids the same as you.  I shake mine and have no issues with shake.

After you PC, are you letting then cool in the PC or outside?  Do you tighten your lids all the way before you PC or leave a little loose?

The more details provided, the better chance we can help you solve this.




In one hand I am lifting the lid and holding the plate.  I then use the other hand with the exacto knife to pick up the agar wedge of a good size and drop it into the jar.  The jar lid is tipped up a bit, but not set down or moved much.

I am letting them cool in the PC.  The lids are on tight with foil on them.  I figure that because there is a hole in the lid and the disc under it that this will allow the pressure to equalize and let steam in before I put the weight on.


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OfflineBigGreenMat
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Re: Issues with Contamination when going to grain from Agar [Re: Caps McGee]
    #25564444 - 10/24/18 07:00 PM (6 years, 2 months ago)

Quote:

Caps McGee said:
Are you getting mold, or bacteria first?  If it's bacteria,  could simply be prepping too wet  :shrug:




Generally mold.  I will try to take some pics or a video of my next attempt.


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OfflineTormatoMFacebookDiscordReddit
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Re: Issues with Contamination when going to grain from Agar [Re: Tookitooki]
    #25564451 - 10/24/18 07:02 PM (6 years, 2 months ago)

Quote:

Tookitooki said:
15 mins from the time it pops.  Never done me wrong.



:whathesaid: Same! That's how I roll. Wait till the steam is only coming out of the main vent then start timing.


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OfflineMagickMushroom
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Registered: 08/24/18
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Re: Issues with Contamination when going to grain from Agar [Re: mushboy]
    #25584104 - 11/01/18 11:55 AM (6 years, 2 months ago)

Mushboy what a great tip. Thanks!

Quote:

mushboy said:
taped some quarters to my rocker so it weighs more. more weight=higher temp=higher psi. you should be able to do that to any pc that uses a weight thingy.:rolleyes:

also runs quietly and barely looses any water:thumbup:



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OfflineMagickMushroom
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Re: Issues with Contamination when going to grain from Agar [Re: RogerRabbit]
    #25584121 - 11/01/18 12:00 PM (6 years, 2 months ago)

RR thhank you for that. Although I haven't had any probs like the ones described in this thread, it is important to know this piece of info. So how many minutes would you recommend the venting period? Maybe 10 to 15 mins before placing the weight on the PC?

also runs quietly and barely looses any water:thumbup:



Quote:

RogerRabbit said:
Quote:

pablokabute said:
2hrs @ 15psi gives me bacterial contam even in the unopened control jars. 2hrs @ 20 psi gives me peace of mind, not to mention perfect sterilization. ive wasted around 50lbs of grains before i made the move.




It sounds like you're failing to allow steam to escape for several minutes before putting on the weight or closing the toggle.  It is very important to get all the air out of the PC and replace it with steam.  Otherwise, you're building air pressure rather than steam pressure and the temp will be much lower.

After proper venting, 15 psi for 90 minutes is going to sterilize the grains sufficiently to get them colonized, assuming quart/liter jars.  Use two hours for larger spawn bags, and keep them separated so steam can pass between, under and over each bag.
RR



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Offlineteladi
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Registered: 06/27/17
Posts: 1,189
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Re: Issues with Contamination when going to grain from Agar [Re: MagickMushroom]
    #25584202 - 11/01/18 12:28 PM (6 years, 2 months ago)

Start timing when there is a steady stream of steam coming out of your vent. 10-15 minutes is typical venting time.

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OfflineGardennub
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Re: Issues with Contamination when going to grain from Agar [Re: RogerRabbit]
    #25602965 - 11/09/18 12:09 PM (6 years, 2 months ago)

Quote:

RogerRabbit said:
Quote:

pablokabute said:
2hrs @ 15psi gives me bacterial contam even in the unopened control jars. 2hrs @ 20 psi gives me peace of mind, not to mention perfect sterilization. ive wasted around 50lbs of grains before i made the move.




It sounds like you're failing to allow steam to escape for several minutes before putting on the weight or closing the toggle.  It is very important to get all the air out of the PC and replace it with steam.  Otherwise, you're building air pressure rather than steam pressure and the temp will be much lower.

After proper venting, 15 psi for 90 minutes is going to sterilize the grains sufficiently to get them colonized, assuming quart/liter jars.  Use two hours for larger spawn bags, and keep them separated so steam can pass between, under and over each bag.
RR




Whoa this is good to know! Thanks :smile:...i might be cyber stalking you on this board a little right now.


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