[blackdog]

Milwaukee has been doing this since the 50's. Instead of burning the sludge however, they run it over a shaker bed as it's dewetted by vacum and then kiln dried. It is then standardized with enzymes and ph balanced for use as the best lawn fertilizer ever made. We would all know it as "Milorganite". People pay $25 per bag for it.

The water is cleaned and returned into Lake Michigan.

Nothing new here. By selling the end product, the energy input to run the system (natural gas) is covered. This supposedly new system neglects to tell us that it's still fired by natural gas.

[libstripper]

This supposedly new system neglects to tell us that it's still fired by natural gas.

Good question. The core of the system is the separation of the fecal solids from the water contained in the feces. That's apparently done by heating the wet, raw fecal matter to the point where the water boils off, something that takes a lot of heat. Apparently, that heat eventually comes from burning the dried fecal matter at high temperatures. What's used to start the fire and does burning the dried fecal matter provide enough heat to offset the cost of the starter fuel? This could be an excellent idea, but it requires more explanation.