Sewage treatment process for effectively denitrifying by utilizing endogenous respiration

The invention discloses a sewage treatment process for effectively denitrifying by endogenous respiration, which comprises the following steps: treating sewage by an anaerobic tank, an anoxic tank, amicro-aerobic zone tank, an aerobic tank and a secondary sedimentation tank in sequence, feeding the sewage from the upper end of the anaerobic tank, making the sewage with the anoxic tank by the anaerobic tank and then feeding into the micro-aerobic tank from the middle part of the anoxic tank, wherein the micro-aerobic tank is communicated with the bottom of the aerobic tank, sewage in the micro-aerobic tank enters the aerobic tank from the bottom after reaction, the sewage in the aerobic tank overflows into the secondary sedimentation tank after short retention, and the sewage is dischargedfor advanced treatment after sedimentation. The addition of salt is reduced, the secondary pollution is reduced, the DO control is relatively low, the electric charge is saved, the process control isrelatively easy, and large