Abstract: A compression apparatus for solid waste includes a precompression device and main compression device. A precompression device includes a precompression sleeve for receiving therein a cylindrical vessel filled with the solid waste and a press ram arranged above said precompression sleeve and movable upward and downward for compressing, at high pressure, the cylindrical vessel in the precompression sleeve. The compression sleeve includes an upper straight large diameter portion, and an intermediate tapered portion, thereby compressing the cylindrical vessel and reducing its volume in three dimensional directions by compressing the vessel radially inwardly at the tapered inner surface of the intermediate tapered portion. The main compression device includes a main compression press ram and a main compression sleeve having an inner diameter no more than the inner diameter of a lowermost end of the intermediate tapered portion.

Abstract: A compression and volume reduction treatment apparatus for solid waste including a compression sleeve for receiving therein a cylindrical vessel filled with the solid waste and a press ram arranged above said compression sleeve movable upward and downward for compressing, at high pressure, the cylindrical vessel in the compression sleeve. The compression sleeve includes an upper straight large diameter portion, a lower straight small diameter portion and an intermediate tapered portion, thereby compressing the cylindrical vessel and reducing its volume in three dimensional directions by compressing the vessel radially inwardly at the tapered inner surface of the intermediate tapered portion and compressing axially at the inner surface of the lower straight small diameter portion when the cylindrical vessel in said upper straight large diameter portion is urged by said press ram in a uniaxial direction.

Abstract: A compression and volume reduction treatment apparatus for solid waste comprises a main compression and a pre-compression device. The main compression device includes a compression sleeve for receiving therein a cylindrical vessel filled with the solid waste and a press ram for compressing downward the filled cylindrical vessel. The pre-compression device comprises a pre-compression press ram and a pre-compression tapered sleeve for inserting the cylindrical vessel into the compression sleeve. The cylindrical vessel has an outer diameter larger than an inner diameter of the compression sleeve, while the pre-compression tapered sleeve has at a lowermost end an inner diameter smaller than the inner diameter of the compression sleeve. An inner circumferential surface of the pre-compression tapered sleeve and an outer circumferential surface of the pre-compression press ram are formed with grooves and ridges slidably fitted with each other.