Vacuum sewage-biodegradation dirt tank device for train and sewage disposal method

The invention relates to a vacuum sewage-biodegradation dirt tank device for a train and a sewage disposal method. The device comprises a dirt tank and a control system, wherein a biological predisposal chamber and an advanced oxidation chamber which are communicated with each other are formed in the dirt tank, the biological predisposal chamber is used for conducting preliminary degradation on dirt and controlling the pollutant index within a primary standard range, and the advanced oxidation chamber is used for thoroughly oxidizing and decomposing pollutants in the predisposed water and controlling the pollutant index within a discharge standard range during direct discharging of sewage to a track. According to the device and the method, online disposal of the sewage and dirt is achieved, the disposed water meets the direct discharge standard and is directly discharged to the track during running of the train, solids are periodically cleaned away by a station, the dirt removal operation cycle of the station