Lowtech Graph lists low-tech options for every need of a home. Here you can compare them, find tutorials to build them, and link them together into a circular system. Why low-tech?

Solids handling

Dealing with what settles out and stays behind: the sludge in a tank, or the solids from a dry toilet. Every on-site system produces some, and what to do with it is the part people forget when choosing one. The options differ in whether a tanker takes it away or the household composts it on site.

Solutions

• Periodic sludge pump-out: A licensed tanker that comes every few years to pump out the sludge that builds up in a septic tank or small treatment plant. The sludge is taken away and treat
• Managed thermophilic humanure composting: A carefully managed compost heap for the solids from dry toilets, kept hot and checked until it is safe. The heat of the working heap kills germs, and time fini