UD and Composting

Waterless UD toilets look similar to a typical toilet, but feature two sections: a bowl that captures the urine and funnels it to a storage tank, and a separate section has a large hole or chute, which allows solids (feces and paper) to fall through into the bio-chamber.

Once in the bio-chamber, the solids decompose and turn into humus soil conditioner or compost, which looks and smells like soil. (See Composting Toilet Systems)

The Wostman Eco-Dry waterless urine-diverting toilet.
The Wostman Eco-Dry waterless urine-diverting toilet.

There are several waterless UD toilets on the market:

  • EcoDry Urine-Diverting Toilet made by Wostman has an optional flush, which uses less than 1 cup of water to flush urine into a storage tank.
  • Camp-style waterless UD toilets on the market for the DIY market
  • The Separett UD/Composting Toilet 
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