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Old 04-05-2009, 01:42 PM
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Daner Daner is offline
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Bad Saw Dust In the Pile

Hey all...Happy Spring to ya all

What do you think about the different Saw Dusts that go Into a Compost pile?

MDF and Plywood have Glues mixed with them...Do they harm Our piles?

How about Walnut? Or other woods

Thanks for your Input

Daner
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Old 04-06-2009, 05:25 PM
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I'm wondering If the glue will still be In the compost after the heating stage Is done

anyone??
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Old 04-06-2009, 05:30 PM
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The glue is still there

Where else can it go

IDK but I doubt it can hurt anything
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Old 04-06-2009, 05:47 PM
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It may get burnt away with the heating process

Plywood, osb and MDF carry Ureaformaldahyde
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Old 04-07-2009, 10:30 AM
Kiril Kiril is offline
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I wouldn't worry all that much about the glue, it is a food source.
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Old 04-07-2009, 11:14 AM
dishboy dishboy is offline
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Not sure about the plywood?
http://www.epa.gov/iaq/formalde.html#Health%20Effects
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Old 04-07-2009, 11:39 AM
Kiril Kiril is offline
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Quote:
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Not really sure what IAQ has to do with composting.
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Old 04-07-2009, 12:12 PM
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Not really sure what IAQ has to do with composting.
Just was not sure if the formaldehyde would be a issue or not composted?
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Old 04-07-2009, 12:18 PM
Kiril Kiril is offline
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formaldehyde = H2CO

It is worth noting that a formaldehyde + water solution can be used as a sterilizer. The question is if the concentration in a compost pile would be high enough to cause concern. Given mold can utilize some formaldehyde based glues used in building materials as a substrate, I suspect it probably is not much of a concern in a compost pile.

Last edited by Kiril; 04-07-2009 at 12:28 PM.
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Old 04-07-2009, 12:54 PM
44DCNF 44DCNF is offline
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From wikipedia on urea formaldehyde...
Urea formaldehyde is also used in agriculture as a controlled release source of nitrogen fertilizer. Urea formaldehyde’s rate of decomposition into CO2 and NH3 is determined by the action of microbes found naturally in most soils. The activity of these microbes, and therefore the rate of nitrogen release, is temperature dependent. The optimum temperature for microbe activity is approximately 70°-90°F.

On another note, I think staying away from lumbers pressure treated with arsenic would be the bigger concern. 5 T. of wood ash from CCA wood is enough to kill a half ton cow, 1 T. a human. Is there 'Scopulariopsis breviculis' fungus in the pile? That fungus was known to release arsine gas in it's breaking down of arsenic treated wallpaper and glue, which poisoned people in Europe in the 19th century.
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