NOVELTY - The apparatus divided into sections by a movable plate (34) has oxygen feed pipes in its inner wall lower portion. A projected section (32) with catchment groove (27) is provided to prevent bridging of sediments and to eliminate condensed water. A discharging screw discharges the compost through a projected opening (28).    DETAILED DESCRIPTION - The apparatus has rectangle shaped side walls (22) and a ceiling wall (23). A raw material inlet (25) is provided in the ceiling wall portion of the apparatus. An exhaust tube draws out the fermentation exhaust. Oxygen feed pipes are attached to the lower portion of the inner wall of each partitioned section of the apparatus. The reservoir space of the apparatus holds sediment deposits to the mean thickness beyond 2 meters. The discharging screw to discharge the compost produced is provided in the bottom portion of the apparatus. The screw has a transfer screw portion (50) and a seal screw portion (51). Two or more screws may be used which are mutually rotated in opposite directions. The transfer screw portion has gradually increasing pitch towards the projected opening. The triangular projected section is provided in the upper portion of the inner wall of each section of the apparatus to prevents the bridging of the sediments formed as fermentation proceeds. The projected section has the catchment groove which collects and eliminates the condensed water from the ceiling. The movable plate is supported by metal seats (38,39). Two or more pairs of movable plates may be provided. The movable plates of the different sections are mutually rotated in opposite directions using a biaxial drive unit. A switching unit changes the rotation direction of the movable plates by changing the rotation direction of the two axes provided to the single drive unit. The switching unit changes the rotation direction for every predetermined rotation.    USE -   For high temperature fermentation of waste foodstuff, organic refuse from slaughter houses, flower markets, poultry farms, zoo, fisheries, etc., to produce compost.    ADVANTAGE -   Since the catchment groove collects and eliminates the condensed water produced in the ceiling portion of the apparatus, heat loss in the apparatus is reduced and the increase in aeration resistance is reduced. Even if the moisture content in the prepared raw material is high, suitable processing is achieved. Also, the number of days necessary for fermentation is reduced. Since the projected section prevents the bridging of the sediments into a compact mass, good aeration of the sediments is enabled, and fermentation is promoted. The movable plate enables the vertical descent movement of the raw material in specified quantities and hence the charge of the raw material from one section of the apparatus to the other section is controlled. Run operation is simplified and labor savings is achieved. The movable plate enables the release of exhaust gases.