Method for realizing synchronous denitrification and dephosphorization of domestic sewage in high-altitude areas by optimally controlling aeration flow

The invention discloses a method for realizing synchronous denitrification and dephosphorization of domestic sewage in high altitude areas by optimally controlling aeration flow. The problem of poor nitrogen and phosphorus removal effect caused by unreasonable control of dissolved oxygen of a domestic sewage treatment system in high-altitude areas at the present stage is solved. According to the method, an anaerobic/aerobic SBR reactor is adopted, and the concentration of dissolved oxygen (DO) in the reactor is controlled to be 0-2.5 mg/L by optimally controlling the aeration flow, so that stable operation of the reactor at a low-pressure and low-oxygen environment is guaranteed, and synchronous denitrification and dephosphorization of domestic sewage in high-altitude areas are realized. According to the method, the requirement of the system on dissolved oxygen is reduced in the operation process of the anaerobic/aerobic SBR reactor, reasonable control over the concentration of the dissolved oxygen is achieve