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OfflineMyTiny_Shroom
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Registered: 08/30/13
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another acid/base ?
    #19286902 - 12/17/13 02:07 AM (10 years, 2 months ago)

Hi, All!  So I got hold of three 55 gal. plastic barrels.  One of them have hydrated lime and peroxyacetic acid in it.  I need to clean up the inside.  My question is do I need to neutralize the acids first before cleaning it with water?
And does baking soda help to neutralize these acids?


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InvisibleSmushroom
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Registered: 02/02/05
Posts: 2,806
Re: another acid/base ? [Re: MyTiny_Shroom]
    #19287005 - 12/17/13 03:16 AM (10 years, 2 months ago)

If a mod sees this may want to move it to the chem forum, you'll get better responses there.

Are these EMPTY barrels that had the chems in them previously or are they FULL barrels? If full and with that large a quantity of chemicals please don't just dump them out, take the necessary precautions when disposing of it.

Ok with that being said:

If they are empty:

Just wash out the hydrated lime barrel several times with hot water then scrub it with soapy water and rinse.

If the peracetic acid barrel is empty just mix up a few gallons of water and 2-3 boxes of baking soda. Rinse/scrub the sides really well with it, rinse, wash with soapy water, rinse again. Should be fine.

If they are full:

Be very careful with the peracetic acid. It isn't that strong of an acid but it is a pretty strong oxidizer and the odors can be overwhelming as well.

Does it specify the concentration of the peracetic acid? If it was used as a sanitizing solution it is probably 2% but if it was used for chemical/industrial purposes it is probably 15%. Thats the standard concentrations I've seen but there could be more.

You should neutralize the acid as well as decompose the peroxide in it. You can neutralize the acid with either baking soda (will need a lot) or you could use the hydrated lime. Whatever you do ADD IT VERY SLOWLY. It will foam and give off gases (mostly CO2 but nasty fumes will come off too). Keep adding it until it stops bubbling, then stir it and add more until it really stops bubbling. AFTER the acid has been neutralized you can decompose the peroxide with potassium permanganate. Just google Pro Pot Perm and you'll see places you can buy it either locally or online. Again add it SLOWLY because it will foam. It shoudl turn purple when it first goes in then turn immediately clear again. Keep adding untit turns pink/purple and stays that color. It is then safe to pour out and wash.


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OfflineMyTiny_Shroom
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Re: another acid/base ? [Re: Smushroom]
    #19290194 - 12/17/13 07:20 PM (10 years, 2 months ago)

Very insightful.  Thanks much for the infos.
I know what to do now.  Yep, very strong smell at 30%
industrial strength sanitizer.  These are empty barrels but
with a cup or 2 that they cannot completely poured out. 
I am thinking I can use a bit to kill off the already cut off backyard tree by pouring onto the tree trunk.  Then after the trees
are dead set fire on them to burn off the rest.


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OfflineMyTiny_Shroom
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Re: another acid/base ? [Re: MyTiny_Shroom]
    #19294889 - 12/18/13 07:44 PM (10 years, 2 months ago)

Here is what I did to clean them.  I poured the remaining cup or so of liquid on the tree trunks.  And then flushed the inside of the barrel with running water to further dilute the acids.  After a few flushed with the water I put some clean water inside the barrel.  Finally poured a 3"x5" small box of baking soda into the barrel.  Recap the hole and rolled the barrel around a few times.  There is more than enough baking soda to neutralized all the acids.  Now the barrel doesn't smell like acid anymore.  I'll wait a few more days and then flush the barrel again with clean water.


Edited by MyTiny_Shroom (12/18/13 07:45 PM)


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InvisibleSmushroom
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Re: another acid/base ? [Re: MyTiny_Shroom]
    #19298239 - 12/19/13 02:23 PM (10 years, 2 months ago)

Sounds good. I was going to say to just roll the barrel around but I was afraid there may be enough CO2 produced to pop the lid off so I didn't :P

Depending on what you are using it for I'd probably wash it with soapy water as well. A lot of industrial barrels can get various trace amounts of oils on the insides and that will get them off. Doubt there will be any on either but couldn't hurt.


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OfflineJMcDoogle
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Re: another acid/base ? [Re: Smushroom]
    #19298281 - 12/19/13 02:35 PM (10 years, 2 months ago)

This may seem stupid, but I have access to multiple 30-55g drums, probably a few a week...

Now - What are good uses for them?


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InvisibleSpitballJedi
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Re: another acid/base ? [Re: JMcDoogle]
    #19298372 - 12/19/13 02:59 PM (10 years, 2 months ago)

LC


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InvisiblePestile

Registered: 05/02/13
Posts: 875
Loc: Northern Europe
Re: another acid/base ? [Re: SpitballJedi]
    #19298425 - 12/19/13 03:10 PM (10 years, 2 months ago)

:bigyesnod:


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InvisibleSmushroom
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Registered: 02/02/05
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Re: another acid/base ? [Re: Pestile]
    #19298513 - 12/19/13 03:30 PM (10 years, 2 months ago)

OP never said what he was going to do with his. Only thing mushroom related I would think may be relavent would be to use them for pasteurizing bulk substrate. I'm not sure about the height of 30gal drums but they could possibly make pretty decent monotubs, 55gal would be too tall to harvest effectively.

Would be funny to see a 55gal BRF cake. You would have to get very creative to get enough oxygen in it for the myc to survive though.


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