Anaerobic-aerobic treatment equipment for oily sewage in oil and gas field

The utility model relates to the technical field of oil and gas field sewage treatment, in particular to oil and gas field oily sewage anaerobic-aerobic treatment equipment. According to the technical scheme, the device comprises a sewage pipe, a biological tank, an adjusting tank and a medicament box, a communicating valve is fixedly connected to the position, close to the lower surface, of one side of the adjusting tank, the tail end of the communicating valve is fixedly connected with the position, close to the lower surface, of the outer surface of the biological tank, one end of the sewage pipe is fixedly connected with a three-way valve, and the lower surface of the three-way valve is fixedly connected with a mixing pipe; a bent pipe is fixedly connected to the side, away from the sewage pipe, of the three-way valve, the tail end of the bent pipe is located on one side in the biological tank, a water quality detector is fixedly installed on one side of the upper surface of the agent box, the input end o