(DE3827282-C)      Domestic or garden refuse is formed into compost in a large dia. rotary drum above a conveyor movable in forward or reverse direction. The drum is at least partly encased with perforated sheet material through which small particles may drop to the conveyor for transfer to a stack or vertical transporter. At intervals the drum interior has apertures along whose one edge is pivotally attached a cover plate which with the drum rotated in one direction closes the aperture, while opposite rotation swings the cover plate away from the aperture, under its own weight. Rotary cutters break down large lumps.    ADVANTAGE -   Coarse and fine material is distributed with max. uniformity.    (10pp)    (US4946108-A)      Rotary horizontal composting drum has its casing at least partly in the form of perforated sheet metal panels, through which compost falls onto a conveyor movable either to a discharge end to deposit compost, or oppositely to deliver compost to a lifting conveyor at the entry end of the drum. A charger receives compst from the lifting conveyor for feed into the drum, which can rotate in either direction. The casing has at least one door hinged about an axis parallel to the drum axis. Pref. the charger includes comminuting appts.    USE -   Composting domestic and-or garden refuse.    (10pp)    (EP354443-B1)      An appts. for producing compost, more partic. from household and/or garden waste or the like, comprising a drum (1) adapted to be rotated in both directions and to be driven about its substantially level longitudinal axis and which has a casing formed at least partly by encircling perforated sheeting (5) and which has openings (60) able to be shut respectively by means of an inner door (61) pivoting about a pivot axis parallel to the axis of the drum, and has an underlying longitudinal conveying device (22) able to be driven in both directions and extending approximately parallel to the axis of the drum, by means of which conveying device to the material falling from the drum (1) may be selectively passed to a compost dump (3) or to an upright conveying device (26) arranged adjacent to one end side of the drum, which upright conveying device (26) cooperates with a charging device (33) arranged in the top part of the drum (1), characterised in that the openings (60) provided in the drum casing are at least partly each designed as an ejection opening arranged in a section of the length of the drum (1) constituting a collecting zone for coarse material, the respectively associated door (61) thereof being arranged so that, dependent on the dirction of rotation of the drum (1) it may freely move under the effect of gravity acting thereon out of a dependent position in the upper part of the drum either into a setting closing the associated opening (60) or can be laid down in engagement with the drum casing adjacent to this.