There is an effort in the village of Kivalina to produce ‘biochar’ for sanitation, which could turn feces waste into a sustainable energy source!  By collecting the waste and letting it be processed through a method of heating it up, and often the BTUs  drop out.  Yet what is left is a charred substance which could be used as a ‘holding reservoir’ for nutrients and water in fields/gardens.  It would come out of production looking like charcoal and probably put into briquet form.  It will take some experimenting with temperature and lab work to reduce germ carries, but it might be the best set up at the household level to get rid of biological hazard and put it to use for energy or horticulture work!  We shall see how it is used and how much effort is required.