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Purging
Jun 30, 2012 15:02:25 GMT -7
Post by USCGME2 on Jun 30, 2012 15:02:25 GMT -7
Does one absolutely have to purge beans, rice, etc with dry ice or whatever? Is it ok to just put it in the bucket and throw in a dessicant as long as it is food grade and has a gasket seal?
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Purging
Jun 30, 2012 16:37:47 GMT -7
Post by cowgirlup on Jun 30, 2012 16:37:47 GMT -7
The purpose of the dry ice is to get to oxygen out of the container so any insects or eggs that hatch, will die. If you're not concerned about that then I guess you don't have to do it. I'd rather be safe than sorry. Unless I'm looking for a little extra protein. ![;)](//storage.proboards.com/forum/images/smiley/wink.png) I use oxygen absorbers and a dessicant pack in my dried food storage.
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Purging
Jun 30, 2012 16:45:47 GMT -7
Post by orly152 on Jun 30, 2012 16:45:47 GMT -7
I dont mine the insects in my beans or rice....in a shtf I could use all the extra protein that I can get ;D
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Purging
Jun 30, 2012 19:19:28 GMT -7
Post by tjwilhelm on Jun 30, 2012 19:19:28 GMT -7
Rather than use dry ice, I've used a tank of CO2, normally used for carbonation. I put a tube from the tank down into the bottom of the grain bucket. Then, I slip the lid over all of the bucket top, except where the tube is inserted. I open the valve a bit and allow the tank to slowly fill with CO2. The CO2 is heavier than the air in the bucket, so it will displace the O2 and nitrogen. You can see the CO2 spilling over the edge elf the bucket when it has purged out the air. At this point, I turn off the valve, withdraw the tube, slide the lid on the rest of the way, and tap her home with a rubber mallet. Works well!
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Purging
Jun 30, 2012 19:22:32 GMT -7
Post by Cwi555 on Jun 30, 2012 19:22:32 GMT -7
Rather than use dry ice, I've used a tank of CO2, normally used for carbonation. I put a tube from the tank down into the bottom of the grain bucket. Then, I slip the lid over all of the bucket top, except where the tube is inserted. I open the valve a bit and allow the tank to slowly fill with CO2. The CO2 is heavier than the air in the bucket, so it will displace the O2 and nitrogen. You can see the CO2 spilling over the edge elf the bucket when it has purged out the air. At this point, I turn off the valve, withdraw the tube, slide the lid on the rest of the way, and tap her home with a rubber mallet. Works well! Is there a reason you choose CO2 over a 100 percent nitrogen purge?
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Purging
Jun 30, 2012 19:43:45 GMT -7
Post by wtrfwlr on Jun 30, 2012 19:43:45 GMT -7
Rather than use dry ice, I've used a tank of CO2, normally used for carbonation. I put a tube from the tank down into the bottom of the grain bucket. Then, I slip the lid over all of the bucket top, except where the tube is inserted. I open the valve a bit and allow the tank to slowly fill with CO2. The CO2 is heavier than the air in the bucket, so it will displace the O2 and nitrogen. You can see the CO2 spilling over the edge elf the bucket when it has purged out the air. At this point, I turn off the valve, withdraw the tube, slide the lid on the rest of the way, and tap her home with a rubber mallet. Works well! Is there a reason you choose CO2 over a 100 percent nitrogen purge? Before TJ answers I wanna try and take a guess. Because you can see the CO2 purge and not the Nitrogen?
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Purging
Jun 30, 2012 20:00:24 GMT -7
Post by offtrail on Jun 30, 2012 20:00:24 GMT -7
All great information and anything you can do to protect ones food is well worth learning.
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Purging
Jun 30, 2012 20:04:45 GMT -7
Post by Cwi555 on Jun 30, 2012 20:04:45 GMT -7
Is there a reason you choose CO2 over a 100 percent nitrogen purge? Before TJ answers I wanna try and take a guess. Because you can see the CO2 purge and not the Nitrogen? Actually, it was a question to if there was some advantage I was unaware of for CO2. I've always nitrogen purged as it's heavier than air, but I've not studied CO2 purging as an alternative.
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Purging
Jun 30, 2012 20:09:17 GMT -7
Post by wtrfwlr on Jun 30, 2012 20:09:17 GMT -7
I'm curious as well. I was just taking a blind stab at it.
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Purging
Jun 30, 2012 21:57:14 GMT -7
Post by Deleted on Jun 30, 2012 21:57:14 GMT -7
I am very interested in the CO2 as a purger as well. I hate dealing with dry ice, so I just vacc pack everything in the size meals I want them for and use desicant packs. The CO2 would ne great for large pails of wheat, and such.
When you use the CO2 and open a bucket to remove some beans (for example) do you need to purge it again before closing it back up, or will the CO2 still be in there?
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Purging
Jun 30, 2012 22:24:58 GMT -7
Post by offtrail on Jun 30, 2012 22:24:58 GMT -7
Dink I believe as long as you don't tip it over it should stay in the bucket. But anything you put in the bucket to scope out the contents will displace the co2 and push it out. hope I explained that right if not i'm sure someone will correct me ![:)](//storage.proboards.com/forum/images/smiley/smiley.png)
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Post by geron on Jul 1, 2012 4:06:28 GMT -7
Is there a reason you choose CO2 over a 100 percent nitrogen purge? Before TJ answers I wanna try and take a guess. Because you can see the CO2 purge and not the Nitrogen? This is true but with Nitrogen . . . place a tea candle at the opening of the bucket or mylar bag. When the candle extinguishes you've purged the O2. With either N or CO2 it's important to remove the wand and seal in such a way that minimizes turbulence and air mixing. I will drop an O2 absorbent and desiccant on top for added protection. A 300cc O2 absorbent should be adequate for a 5 gal bucket that has been purged.
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Post by Cwi555 on Jul 1, 2012 8:52:26 GMT -7
We Use an O2 sensor, but that method works fine and dandy. Before TJ answers I wanna try and take a guess. Because you can see the CO2 purge and not the Nitrogen? This is true but with Nitrogen . . . place a tea candle at the opening of the bucket or mylar bag. When the candle extinguishes you've purged the O2. With either N or CO2 it's important to remove the wand and seal in such a way that minimizes turbulence and air mixing. I will drop an O2 absorbent and desiccant on top for added protection. A 300cc O2 absorbent should be adequate for a 5 gal bucket that has been purged.
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Purging
Jul 1, 2012 11:13:28 GMT -7
Post by garret on Jul 1, 2012 11:13:28 GMT -7
i just use oxygen absorbers and mylar liners, put the mylar liner in the pail, fill it with whatever food stuff, put in an oxygen absorber, squish as much air out of the bag as you can, seal the top so there is plenty of length left on the bag, if you come back in a few days it looks like it has been vacuum packed.
no oxygen = no critters
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Purging
Jul 1, 2012 19:19:21 GMT -7
Post by tjwilhelm on Jul 1, 2012 19:19:21 GMT -7
Why did I use CO2 instead of N2?
First and foremost, it was because I had easy access to a tank of CO2!
On top of that, the blend of gasses that comprise "air," at about 70 degrees F has a density of about 1.2 Kg/m3; whereas, pure CO2 (ignoring the advantageous fact that it cools and hence increases in density as it exits its pressure tank) at 70 degrees F has a density of about 1.8 Kg/m3. Being more dense (especially when cooler), the CO2 displaces the "air."
It's important to feed the CO2 SLOWLY into the bottom of the bucket! The visual effect is like a shimmery mirage when the CO2 spills over the top of the bucket.
With a few friends, we sealed up about 40, 5-gallon buckets of wheat berries, purged with CO2 in this manner. 15 years later, the wheat seemed perfectly fine...NO BUGS!
N2 might be better and easier (denser); but, the CO2 seemed to work just fine! After all, if dry ice is good enough, remember that dry ice is just frozen CO2 that sublimes into CO2 vapor.
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