NOVELTY - Solid anaerobic reactor comprises a feeding pipe and an external heating circulation pipe connected to the upper part of the reactor, where the other end of the external heating circulation pipe is connected to the lower part of the reactor. The bottom of the reactor is connected to a sludge discharging pipe and there are 6 columnar tubes mounted in the reactor. A scum board and a scum groove are arranged above the columnar tubes. The scum groove is in communication with the sludge discharging pipe through the scum discharge pipe. A gas collecting chamber is arranged above the scum board.    USE - The reactor is useful for removing circulating air and stirring biogas.    ADVANTAGE - The reactor uniformly stirs organic solid waste in the reactor, improves anaerobic digestion and removal rate of pollutant, where volatile solids removal rate is 50-60%, and the reaction retention time is 10 days.    DETAILED DESCRIPTION - Solid anaerobic reactor comprises a feeding pipe and an external heating circulation pipe connected to the upper part of the reactor, where the other end of the external heating circulation pipe is connected to the lower part of the reactor. The bottom of the reactor is connected to a sludge discharging pipe and there are 6 columnar tubes mounted in the reactor. A scum board and a scum groove are arranged above the columnar tubes. The scum groove is in communication with the sludge discharging pipe through the scum discharge pipe. A gas collecting chamber is arranged above the scum board. The top of the gas collecting chamber is provided with a filler layer. The top of the reactor is provided with an exhaust pipe connected to the purifying tower. The outlet of the purifying tower is connected to a gas distribution tube. The gas distribution tube is lead to the reactor via the lower part of the reactor and is divided into six branched gas distribution pipes extending upward to the lower part of six columnar tubes. The end of each gas distribution tube is provided with a gas outlet with upward opening.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of solid anaerobic reactor for removing circulating air and stirring biogas.