TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The second pressure lock at the outlet opening is either formed itself as a device for separating the solid and liquid reaction products or interacts together with a separation device. At least an additional treatment vessel is connected between the outlet opening of the second reaction vessel and the third pressure lock, for further treatment of the reaction products. The first reaction vessel is equipped with a second outlet opening and a second pressure lock, by means of which at least a portion of the liquid reaction product is discharged while maintaining the reaction pressure in the reaction vessel. A heat exchanger is operated before the inlet opening of the second reaction vessel, flows through either of at least a portion of the reaction products and/or is connected to a heat energy source. A mechanically activated device) or a thermally activated device are present for separating the solid and liquid reaction products. The first pressure lock at the inlet opening is an airlock rotary valve. The feed pump is a thick matter pump, preferably a dual spindle pump. The second pressure lock at the outlet opening is a dual spindle pump, which is operated in a reverse gear. The first reaction vessel is at least approximately aligned vertically. A first agitator is arranged in the inner space of the reaction vessel and preferably, the first agitator has a conveying effect in the direction of the outlet opening. The second reaction vessel is at least approximately aligned horizontally. A second agitator is arranged in the inner space of the second reaction vessel and preferably, the second agitator has a conveying effect in the direction of the outlet opening. The second agitator is formed as a screw conveyor. The third reaction vessel has at least a gas dome or is connected to a gas dome. The gas dome has a fourth pressure lock, by means of which the gaseous reaction product is discharged continuously or in portions, while maintaining the reaction pressure in the third reaction vessel. The outlet opening for the solid reaction products is connected to a dryer. The inlet of the dryer is connected to a heat exchanger. The outlet of the dryer is connected to a particle separator.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The solid and the liquid reaction products are separated out of the reaction vessel at least partially from each other. The reaction products are applied over a device for separating the solid and liquid reaction products from the reaction vessel, in such a way that the reaction pressure is maintained in the reaction vessel. The reaction products from the first reaction vessel are subjected to at least one of the additional steps before they are carried out such that the reaction pressure is maintained in the first reaction vessel. At least a predetermined portion of the liquid reaction products obtained during the reaction from the first reaction vessel, is applied in such a way that the reaction pressure is maintained in the reaction vessel. The treated waste material is brought to a higher temperature by means of a heat exchanger before the introduction into the reaction vessel. The heat energy for the heat exchanger is taken out at least partially from the heat energy of the reaction products. The heat energy is taken out at least partially from the excessive reaction heat energy from the second reaction vessel. The solid and liquid reaction products are separated from each other in a mechanical separator. The solid and liquid reaction products are separated from each other thermally. The treated waste before it is introduced into the second reaction vessel is at least partially dehydrated. The excess reaction product obtained in the course of the reaction is supplied to the power network of the brewery. The reaction products are supplied for further utilization of the power network of the brewery.