And as in insect control, an airtight lid is very helpful with odor control. You may need permits from some government agencies before building your composting toilet. When choosing a composting toilet, decide on how many people will use the system every day. Choosing Location Access and drainage are important considerations when choosing a site. Give yourself room for easy maintenance and repair.
Drainage is easier if the composter is raised above the level of the floor.
And check that the floor can support the load of the composter. CCAT has a composting system built into a two-story house. Shown in Figure 2, the toilet is on the top floor and a two-chamber composter is on the ground floor. A small can of sawdust is added to the compost after each use. CCAT also uses a solar powered pasteurization system.