OH WOW, I want one of these sooo badly. We live off grid and therefor rely on propane for cooking and hot water most of the time, and sometimes heat in the winter, and we have to treat all of our own waste. This is an awesome permaculture technology solution and I have just been waiting for an explanation of the process. Thank you for sharing! I hope soon we will have a biogas system as well as biofuel and am looking forward to sharing it on here in the future!