Composting toilets are dry toilets that use little or no water to process wast. The waste is instead mixed with substances such as peat moss or sawdust to absorb liquids, promote aerobic digestion and reduce odor. There are currently 3 composting toilets on the market:
Ecovita Separett Villa was voted one of the top 10 green building products of 2009 by Sustainable Industries Magazine. Suitable for nearly all applications, year round or summer use, it is made from recyclable high-gloss polyethylene. It is designed so the user feels as if they are using a modern, water flush toilet, but it uses just electrity or a battery for a ventilation fan--no water. The urine is diverted through a water water pip. When the solid waste container is full, the user can attach a lid and dispose of the waste and replace with a new container. The urine diverting system ensure that liquids and solids are never mixed, which means there is no latrine-type odor.
Envirolet FlushSmart Vacuum Flush is the first vacuum flush and composting toilet system comb that allows the toilet to flush waste up to 70 feet away, which eliminates theneed for gravity & prevents installation problems. It uses less water than conventional toilets by using as little as 0.2 liters per flush. The toilet can be installed anywhere composting toilets cannot, such as basements and cottages on rock.
Sun-Mar Excel offers a variety of composting toilets: self-contained, central flush, and central dry systems. The self-contained system is the best-selling and the first to be certified by the National Sanitation Foundation, according to the Excel website. The toilet can be used in residential and light commercial applications.