This summer, I read a fascinating book call "The Humanure Handbook; a guide to composting human manure"
For two decades now I have imagined waste water recycling systems for domestic use.
We are planning to build a green home in a semi-arrid desert space, with a solarium and (hopefully) attached green house(s). Water conservation is very important!
This book details how human sewage can be composted to provide safe, balanced, and fertile soil fit for gardening. This promotes a direct, synergistic relationship between you, your food, and your immediate environment!
Sound interesting? The entire book is available for free, online at http://humanurehandbook.com/