(DE4231293-A1)      To process waste matter, esp. organic waste from restaurants and catering establishments, it is finely ground and mixed to pass continuously through an irrigation unit (6,9) where the separate particles are wholly rinsed with air.    Also claimed is an appts. with an irrigation unit (6,9) having a rising section (9) and a feed (6) for the rising section (9).    Pref., in addition to irrigation, the ground material is continuously mixed through, and a portion of the material is constantly returned to the grinder (15). The temp. and/or the moisture level of the ground material is maintained according to the nature of the waste matter and the working condition. The fresh air is fed in under control.    USE/ADVANTAGE -   The method is for the disposal of organic waste, esp. from restaurants and the like. The system gives the matter an even consistency with a high moisture content, in a compact and suitable structure for mixing, with good aeration for aerobic conversion into a compost.    (US5377921-A)      Waste is treated by passing from a hopper through a cutter to a horizontal feeder and then to a rising feeder which passes part back into the hopper and part to a chamber where it falls by gravity back onto the horizontal feeder. The feeders are pref. cooperating oppositely-rotating worm conveyors, and the material is mixed during conveyance. Material temp. and/or moisture content may be controlled after the cutter and a regulated feed of fresh air may be provided.    USE/ADVANTAGE -   Partic. for treating organic catering waste. Optimises aerobic decomposition of organic material and facilitates moisture content reduction.    (JP7204610-A)      To process waste matter, esp. organic waste from restaurants and catering establishments, it is finely ground and mixed to pass continuously through an irrigation unit (6,9) where the separate particles are wholly rinsed with air.    USE/ADVANTAGE -   The method is for the disposal of organic waste, esp. from restaurants and the like. The system gives the matter an even consistency with a high moisture content, in a compact and suitable structure for mixing, with good aeration for aerobic conversion into a compost.