Intermittent aeration system for multiple groups of AAO process aerobic tanks

The utility model relates to an intermittent aeration system for multiple groups of AAO (anaerobic-anoxic-oxic) process aerobic tanks. The system comprises a gas inlet main pipe and a plurality of groups of aeration main pipes, each group of aeration main pipes comprises at least one aeration main pipe, a plurality of gas inlet branch pipes are arranged on the gas inlet main pipe in parallel, the front end of each group of aeration main pipes is communicated with one gas inlet branch pipe through a first valve, and the aeration main pipes are provided with a plurality of aeration branch pipes at intervals in the direction from the front end to the rear end; aeration heads are arranged on the aeration branch pipes, the rear ends of each group of aeration main pipes are respectively communicated with a connecting pipe, a second valve is further arranged on each aeration main pipe, the aeration branch pipes are arranged on the two sides of the second valve, and the first valve and the second valve on each group