Abstract:
A waste disposal system (50) includes a water-less toilet with a bowl (40), a side-opening valve (1) and a cylindrical pipe pig (80), the valve being used in a pigging fluid flush system for the water-less toilet, where the toilet bowl (40) empties into the side opening of the side-opening valve (1) when opened. When the side-opening valve (1) is closed, the pig (80) pushes the waste in the side-opening valve (1) to a sewage system. The side-opening valve (1) has an inner cylindrical barrel with a shaped opening through the wall, an outer cylindrical barrel having shaped opening through the wall, where the barrels are co-annular and rotatable, and a means for rotating the inner barrel relative to the outer barrel between a first open position where the shaped openings overlap to form a side opening into the valve, and a second closed position where the shaped openings do not overlap.