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Vault toilet off gasing

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FishScreener

Civil/Environmental
Mar 25, 2008
22
What gases would be expected to off gas from a vault toilet.

For those who may not know: A vault toilet consists of a reinforced concrete vault, with an epoxy lining, with a toilet seat assembly bolted to the top slab of vault. Typically a precast concrete building is placed on top for privacy.

Human waste is held in the vault, and pumped out periodically.

I would expect to have methane, ammonia, and hydrogen sulfide. But are there other gases that would be generated?
 
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Those are the most obnoxious ones. You probably can find nitrogen carbon dioxide, and traces of mercaptans as well.
 
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