NOVELTY - Fixed aerobic compost reactor comprises a reaction chamber, a support, a water tank, a filter tank and a fan. The reaction chamber is a rectangular sealed box body. The water tank is rectangular water reservoir, and is located at the bottom of reaction chamber. The filter tank is a sealed rectangular box body, the inner filter tank is respectively provided with gauze plates and paper plates. The filter tank is respectively connected with a reaction liquid outlet and the water tank by the pipeline, and an outlet of the fan is connected with the air inlet of the top cover.    USE - Used as a fixed aerobic compost reactor.    ADVANTAGE - The reactor: has simple structure; is economical and convenient to use; carries out immobilization of compost, thus reducing the heat loss and ensuring efficient fermentation of the fertilizer, and enhancing aerobic composting; saves energy; and is environmentally friendly.    DETAILED DESCRIPTION - Fixed aerobic compost reactor comprises a reaction chamber, a support, a water tank, a water tank, a filter tank and a fan. The reaction chamber is a rectangular sealed box body, where the rectangular sealed box body is inclined to a bottom plate at an angle of 45 degrees . The middle part of the reaction chamber is provided with a rectangular groove, and the bottom of the groove is provided with a liquid outlet. The top of the box body is provided with a detachable top cover, which has sandwich structure. The upper and lower plates of the detachable top cover are provided with uniformly distributed circular hole. The two sides of the top cover are respectively provided with a water inlet and an air inlet, which are respectively provided with a water distribution plate and air distribution plate in the inlet. The water distribution plate and air distribution plate are sealed sandwich structures. The water distribution plate interlayer and air distribution plate interlayer panels are uniformly distributed within a circular tube. An interval of reaction chamber is uniformly distributed with ventilation columns and spray head. The ventilating column is a casing structure. The upper end of the inner tube passes through the lower end of the top cover of the upper plate and is fixed with the upper plate through a bearing. The upper end of the outer tube and the lower plate of the top cover are fixed to the bottom surface. The inner tube is located at the top portion of the sealed interlayer, which is provided with an air inlet and round tube connections through hose and the air distribution plate on the interlayer plate. The parts of the tube wall of the inner tube and the outer tube located at the reaction chamber are respectively provided with four equally spaced upper and lower vent holes. The inner tube and the lower end of the outer tube are closed at bottom plate. The inner tube can adjust the amount of ventilation by rotating. The ventilation column can change the length of the nozzle along with the ramp-shaped bottom plate. The spray head and the top cover are fixed to round holes of the lower plate. The water inlets of the spray head are located at the top cover of the sealed interlayer, which have the round tube connections through hose and the air distribution plate on the interlayer plate. The reaction chamber on the upper part has an exhaust port, which is connected with an exhaust plate of the ground through pipeline. The exhaust plate is a sealed sandwich structure, which is evenly distributed with round holes. The reaction chamber is fixed on the upright post on the support. The water tank is rectangular water reservoir. The water tank is located at the bottom of reaction chamber. The water is respectively pumped through pipelines, which connect with water tank and top cover of water inlet. The filter tank is a sealed rectangular box body and is provided with the detachable top cover. The inner filter tank is respectively provided with gauze plates and paper plates. The gauze plates and the paper plates are plug-in structures and vertically inserted into the guide groove of the side wall of the filter tank. The filter tank is respectively connected with a reaction liquid outlet and the water tank by the pipeline, and the outlet of the fan is connected with the air inlet of the top cover.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the fixed aerobic compost reactor.