On-line control method for aeration quantity in sewage biological treatment technique

Disclosed is a process for online aeration flow control in biological sewage treatment techniques, wherein a simulated mathematical model and an aeration flow calculation module are added between the dissolved oxygen measurement instrument and the gas flow regulation valve of the aeration control system, the aeration flow set value calculated by the aeration calculation module and the set pressure value by the blowing machine are used for controlling the opening degree of the gas flow regulating valve and the pressure of the blowing machine, the simulated mathematical model includes the related disturbance amount in the real operation procedure.