Abstract: A pulper device includes a vessel in which an annular flow can be generated. The flow acts upon a liquid-sold mixture located inside the vessel and effects a pulping of the same. The device also comprises a screening device for separating coarse materials from the suspension, whereby the screening device has the shape of a truncated cone. The truncated cone is provided with holes on the lateral surface thereof and can be mounted on the base of the vessel in such a way that the truncated cone points upward with the small circular surface thereof, and the lateral surface lies in an approximately tangential manner to the toroidal flow. The screening device is subdivided into different segments and these segments can be individually mounted from the external side of the vessel.
Type:
Grant
Filed:
November 29, 2000
Date of Patent:
April 30, 2002
Assignee:
REA Gesellschaft fur Recycling von Energie und Abfall
mbH
Abstract: A method for the biological processing of organic substances and more particularly for anaerobic biological hydrolysis for subsequent biomethanization, with pH value control, in the case of which the dissolved and/or undissolved organic substances supplied to a first reactor are at least subjected to slight acidification in such reactor, the major part of the undissolved, at least partly acidified organic substances taken from the first reactor are supplied to a second reactor for the performance of at least one solids hydrolysis step and the main part of the dissolved, at least partly acidified organic substances from the first reactor and from the second reactor are supplied to a third reactor for the performance of at least one methanization step.
Type:
Grant
Filed:
March 17, 1995
Date of Patent:
June 25, 1996
Assignee:
REA Gesellschaft fur Recycling von Energie und Abfall mbH
Abstract: In a process of treating waste materials for an anaerobic digestion of the biogenic organic constituents of the garbage, particularly of the source separated organic waste, the wet waste, the residual waste and the commercial wastes, an easily dewaterable suspension of the biogenic organic substances is formed in a pretreating stage by a mechanical treatment including a selective dissolution and defibration of the biogenic organic substances. In dependence on the adjusted solids concentration the action of flow-dynamical forces is so controlled that the not biogenic organic substances, are not subjected to an appreciable disintegration before they are removed at the end of the pretreatment. Non-digestable substances are removed. The suspension is converted to biogas by an anaerobic digestion and to a compost-like residue.
Type:
Grant
Filed:
June 9, 1992
Date of Patent:
January 3, 1995
Assignee:
REA Gesellschaft fur Recycling von Energie und Abfall mbH
Inventors:
Harry Wiljan, Ulrich Niefnecker, Ottokarl Muck, Hans Kubler, Roland Schnell, Roland Carra, Matthias Wild