The utility model relates to the technical field of
sewage treatment equipment, and discloses multistage AO process
sewage treatment equipment which comprises a shell, an anaerobic zone, an anoxic zone and an aerobic zone are arranged in the shell, the outer wall of the aerobic zone is fixedly connected with an
air pump, the output end of the
air pump is fixedly connected with an air inlet
pipe, and the output end of the air inlet
pipe is fixedly connected with an air outlet
pipe. The inner wall of the aerobic zone is fixedly connected with a fixing mechanism for fixing the air inlet pipe, the inner wall of the aerobic zone is fixedly connected with a rotating
assembly, the rotating
assembly is fixedly connected with an
aeration disc, and a connecting
assembly is arranged between the air inlet pipe and the
aeration disc. According to the multi-stage AO process
sewage treatment equipment, two groups of
aeration discs are arranged, after one group is damaged, the other group can continue to work, normal aeration work of an aerobic zone can be ensured, meanwhile, when the multi-stage AO process
sewage treatment equipment is cleaned, the aeration discs can be lifted up, workers are prevented from being stumbled by a pipe network of the aeration discs, and the working efficiency is improved. The possibility that the aeration head is trampled is avoided, and the operation is simple and convenient.