I saw today on "This Old House" TV show, a self contained system for turning all your waste to clear water, which you can drink. The system receives all waste. Turns the solids to liquids. After passing thru a few filters the results are clear and the salesman actually drank a bottle full. This takes the place of sewer systems and septic tanks. It was all installed in the basement.
This would be a God send for boats. ( a much smaller version of course) Has anyone heard of any systems like this for boats??