by DonQuichote, published
Container-type compost toilet for indoor use. You need an outside compost heap for the actual composting.
See the Humanure Handbook (download for free at http://humanurehandbook.com/ ) for all the details of humanure composting.
The drawing shows a thing to put a toilet seat onto a small container that is high enough to sit on. I used this container:
and a standard (in the Netherlands at least) toilet seat from the same shop.
If you use a different container, or a different standard toilet seat, adapt the drawing for it.
To make, make the board in the drawing and put it on the container. Next, use a pencil to draw the inside rim of the container on the bottom of the board. Glue 4 pieces of wood in the corners of the pencil line on the bottom to prevent sliding. The lid can be mounted with two bolts or screws. Put the toilet near a wall, as the lid is otherwise not supported by itself when open.
Usage: fill the container for about a quarter of its contents with sawdust. Put the lid on it, and it is ready to use. You can experiment with different types of sawdust or even with other high-carbon materials (see the Humanure Handook). I specially like cedar or pine, as it smells great. Other types of sawdust may smell unpleasantly, such as elm. Most types have a neutral smell, however.
After using the toilet, cover your excrements with sawdust. Off course, you can put any other compostable material on it as well. It feels a bit odd to throw your kitchen waste into the toilet, but the more diverse the compost is, the better. Do not add anything you would not add to a compost pile, such as chemicals.
When the container is full, empty it on the outdoor compost pile and cover it. Apply patience, some organic kitchen waste or anything else you would put on a compost pile, and you end up with valuable compost!