Here is our member -mrhobbits site, with tons of free info and the Sunny John - a possible solution for some septic problems.
http://www.sunnyjohn.com/index.html
He also has low cost greenhouse heating and cooling information and lots more educational information. Check it out.
http://www.sunnyjohn.com/indexpages/shcs.htm
Neat stuff! :D
Reminds me of my days with Ken Kern when we built the two story composting toilet and solar shower shown on page 327 of the Owner Built Home!
I remember reading a bit about that. I have most of the books. :)