Polygon-shaped rotatable apparatus and its use in composting and cement industries

A rotatable apparatus adapted to facilitate the composting of organic matter comprising:

• an elongated vessel having a longitudinal axis and an internal volume, wherein the elongated vessel is rotatably mounted about its longitudinal axis, and wherein the elongated vessel has a polygonal cross-section, and wherein the elongated vessel is divided into a plurality of transverse chambers and a plurality of longitudinal sections,
• a vessel inlet for receiving material,
• a vessel outlet for removing material,
• means for introducing fresh air into the vessel,
• means for removing spent air from the vessel,
• means for allowing electrical power and electric signals to travel into and out of the vessel,
• means for introducing water into the vessel,
• sensors inside the elongated vessel for monitoring conditions during the composting,
• a programmable controller connected to the sensors which monitors and controls the conditions measured by the sensors,
• means for rotating the vessel on its longitudinal axis, such that the axis of rotation is either horizontal or at an angle inclined up to ten degrees to the horizontal, and
• means for continuous loading and continuous unloading the material.