The Bill & Melinda Gates Foundation is making an effort to improve sanitation in the developing world today. The new project or plant, backed by this foundation, is called the Omniprocessor. It was designed to try and prevent diseases caused by contaminated water.
According to Gate’s blog, there is a headquarters in Seattle where they are doing tests to “handle waste from 100,000 people, producing up to 86,000 liters of potable water a day and a net 250 kw of electricity.”
Here is the plan: the feces are heated to 1000 degrees Celsius to draw off the water, which is then treated to make sure it is safe. Then the dried out feces are burned, producing enough heat to generate electricity needed to extract the water.
For more information on this project see here.