The invention discloses a shallow
aeration aerobic tank, and relates to the technical field of
sewage treatment, the shallow
aeration aerobic tank comprises an aerobic tank body, the aerobic tank body is of a
hollow cylinder structure with a sealed bottom end and an open top end, and a water inlet
pipe and a water outlet
pipe which are communicated with an inner cavity of the aerobic tank body are arranged on the side wall of the upper part of the aerobic tank body; the air main
pipe is arranged at the upper part of the top end opening of the aerobic tank body in parallel and extends along the radial direction of the aerobic tank body by taking the center of the aerobic tank body as a midpoint, and an
oxygen supply pipeline for supplying
oxygen to the interior of the aerobic tank body is arranged on the outer wall of the air main pipe. According to the invention,
air blast aeration is adopted, the aeration depth is shallow aeration at the middle-upper part of the tank body of the aerobic tank, and the aeration depth is shallower than that of conventional aeration, so that the pressure of a fan can be relatively low, the
energy consumption is low, and the aeration efficiency is high. At least one mechanical stirrer is installed in the aerobic tank body and used for preventing
sludge on the lower portion of the aeration head of the aerobic tank from
settling to the tank bottom and dispersing and evenly dissolving
oxygen, the stirring contact area is enlarged through the mechanical stirring device, and stirring is even and stable.