One requirement of the Living Building Challenge is designing the facility to use Net-Positive water, using only the water that falls on site and processing waste on site, both in sync with the site’s hydrologic cycle. Composting toilet systems can play a key role in helping the project meet these requirements. This proven, commercial scale technology demonstrates that processes, like sewage treatment, which typically today rely on expensive infrastructure and ongoing carrying costs for local communities, can instead be handled in simpler, more elegant ways in harmony with natural systems. A dramatic example of this type of system is its use at the Bullitt Center, a Living Building Certified 6-story office building in downtown Seattle. Having a similar system at Nuthatch Hollow will provide a teaching and research experience for the students of Binghamton University while also serving as an example of innovation for the surrounding community.
The design team is exploring a system in which waste from the two toilet in the building is captured in a containment system below the toilet rooms where is it processed by aerobic organisms. The processed waste should only need to be removed from the chamber once or possibly twice a year.