Abstract: A clarification process for the substantially aerobic purification of sewage containing biological waste, in particular kitchen and household waste, is described as well as in particular a decomposition device for carrying out the process. The decomposition device has a clarification container which has a supply and a drain and an air feeding device which feeds air at the bottom of the clarification container.

Abstract: The invention refers to a comminution mill for comminuting product which has to be comminuted, in particular for crushing food leftovers or other biowaste, comprising a housing, a cutter provided therein, and a drive. The invention is characterised by the fact that in the housing of the comminution mill a pump is provided for removing the comminuted product.

Abstract: The invention refers to centrifugal press for drying wet, respectively moist, graded product, comprising a housing provided with a filter basket, which can be set in a motion of rotation, and an outlet for the liquid leaving the graded product. The invention is characterised by the fact that a rotatably supported screw conveyor is arranged in the filter basket, and an inlet for the graded product is provided through which the graded product is conveyed between filter basket and screw conveyor to an outlet for the dried product.

Abstract: The invention refers to a method and a device for processing biowaste. A comminution mill is provided after which a separation device for solid materials and liquids is arranged. A control monitors pressure, respectively flow, of the biowaste ground by the comminution mill, and adjusts, depending on these monitored values, a pump which is arranged before the separation device.