Built-in precipitation type aerobic bioreactor

The invention provides a built-in precipitation type aerobic bioreactor which comprises a tank body composed of tank walls, one side area of the tank body is an aerobic area, the other side area of the tank body is a precipitation area, a partition plate is arranged between the aerobic area and the precipitation area, the partition plate separates the aerobic area and the precipitation area, a plurality of mud-water-gas separation devices are arranged in the precipitation area in parallel, and a buffer zone is arranged below the mud-water-gas separation devices. According to the invention, a precipitation tank is arranged in the bioreactor, and the precipitation function is realized through the mud-water-gas separation devices, so that the occupied area is saved, a sludge reflux device and facility are omitted, and the bioreactor is particularly suitable for small sewage treatment facilities. The built-in precipitation type aerobic bioreactor disclosed by the invention can be flexibly arranged according to fi