Apparatus for pressing and drying a pre-defined amount of waste includes a metal main frame positioned to provide rigid support, and a body mechanically linked to the main frame through a plurality of linkage plates. The apparatus also includes an inlet vertically mounted on the body and a twin screw assembly to press and dehydrate the pre-defined amount of waste. A plurality of mesh screens is rigidly linked to the main frame along the longitudinal axis of the apparatus to remove compressed liquid. The body is also designed to support rotation of the twin screw assembly, and the inlet includes an ingress cross-sectional opening to receive the pre-defined amount of waste.

Disclosed is a screw feeder (10) comprising a pipe (3) enclosing a feed screw 4 arranged on a rotatory shaft (5) running parallel with the length direction of the pipe (3), said pipe (3) further comprising a number of dewatering holes (6). The screw feeder (10) also comprises a number of anti-rotation bars (7) provided on, and extending along, the inside of said pipe (3), said anti-rotation bars (7) protruding in a direction towards said feed screw (4), and an inlet (1) for receiving a solid-liquid mixture arranged at a first end of said pipe (3), and an outlet (2) arranged at a second end of said pipe (3) for discharging an at least partially dewatered solid from said pipe (3). The pipe (3) includes at least one longitudinal pipe section (31) having a first peripheral zone (9) provided in the vertically lower area of said longitudinal pipe section (31) and provided with dewatering holes (6) but no anti-rotation bars (7) and a second peripheral zone (90) provided in the vertically upper area of said longitudinal pipe section (3) provided with anti-rotation bars (7), the overall pipe profile of said pipe section (31) is composed of two differently shaped pipe profiles, a first pipe profile (P1) and a second pipe profile (P2), said first pipe profile (P1) defining the shape of the first peripheral zone (9) and is a profile selected from a square shaped profile, a profile having a partly circular cross-section with a squashed end or a circle segment remove or a partly elliptically shaped profile, and the second pipe profile (P2) defining the shape of the second peripheral zone (90), where the shape of said first pipe profile (P) is selected to allow the outer edges of said feed screw (4) to remove material overlying said dewatering holes (6), and where the shape of said second pipe profile (P2) is selected so as to prohibit any contact between said outer edges of said feed screw (4) and the anti-rotation bars (7). Also disclosed is a pipe for use in such a screw feeder.

A screw press for separating off liquid from an article, comprising a screw shaft together with a conveying helix, which is arranged helically on the screw shaft, and a housing enclosure, which surrounds the conveying helix, wherein a transporting passage for the article which is to be conveyed is formed between the screw shaft, the conveying helix and the housing enclosure, wherein a composite comprising hard-material particles which are embedded in a matrix component to form surface roughness is fastened with material bonding to at least one surface portion of the screw shaft, within the transporting passage. A use of a composite comprising hard-material particles which are embedded in a uniformly distributed manner in a matrix component to form surface roughness, for the purpose of providing fastening with material bonding to at least one surface portion of a screw shaft.

An apparatus is provided for processing reusable fuel comprising: a continuous material supply assembly; a heated airlock feeder configured to continuously receive and process the material supply received therein; a reactor configured to receive the processed material from the heated airlock feeder; and a vapor refining system configured to process vapor supplied by the reactor. The apparatus may comprise a char disposal system configured to eliminate char from the reactor. The apparatus may also comprise a thermal expansion system configured to allow thermal expansion of the reactor. A cooling system may be configured to receive processed fuel from the reactor.

Provided is a wash press that separates liquids and solids from a waste stream. The wash press includes a tank having a semi-cylindrical shape. The tank has an inlet at a top of the tank for receiving a waste stream, a screen disposed in a portion of a bottom of the tank to permit liquid to pass therethrough, and an outlet for permitting solid materials separated from the liquid to pass therethrough. A rotor extends through the tank for transporting and dewatering the waste material entering the tank. The rotor includes a plurality of helical flights interconnected by paddle members to permit agitating the waste material. The wash press also includes a removable cover that enables the rotor to be lifted vertically, and a removably attached screen to facilitate replacement/repair of the same.

A method of processing mince for making surimi comprises washing the mince with water; refining the mince in a perforated refiner drum that produces a layer of mince on the inside surface of the perforated refiner drum; and after washing and before refining, dewatering the mince with a screw press that removes water from the mince before feeding to the refiner drum.

An apparatus is provided for processing reusable fuel comprising: a continuous material supply assembly; a heated airlock feeder configured to continuously receive and process the material supply received therein; a reactor configured to receive the processed material from the heated airlock feeder; and a vapor refining system configured to process vapor supplied by the reactor. The apparatus may comprise a char disposal system configured to eliminate char from the reactor. The apparatus may also comprise a thermal expansion system configured to allow thermal expansion of the reactor. A cooling system may be configured to receive processed fuel from the reactor.

The present invention discloses low cost, on-site, efficient, and compact (stationary or mobile) system for continuous (non-batch operation) conversion of waste to usable products such as sources of energy, fertilizer, etc.

A device according to various embodiments for preparing wet grain can include at least a first screw configured to receive wet grain. A second screw receives the wet grain from the first screw. At least one of a compressing element and a dehydrating element is included with at least one of the first screw and the second screw to cause a physical property change to the wet grain.

The present invention discloses low cost, on-site, efficient, and compact (stationary or mobile) system for continuous (non-batch operation) conversion of waste to usable products such as sources of energy, fertilizer, etc.