Since toilets seem to be the most popular subject on this blog, I've found another interesting design for our dear readers.
Sun-Mar make a range of composting toilets which, to me, are a bit of a hybrid between a composting and septic toilet. They make a self-contained unit, which is something like the tried and trusted Separett. It's quite a bit more advanced, however, with evaporators and dryers to speed and civilize the composting process.
They also provide a central system, where one or more toilets is connected to a tank beneath the house. Composting then takes place away from the bathroom, making the process even cleaner and quieter.
These units can run with and without water, and even with or without electricity. It's quite a wide range of composting toilet products. I am impressed!