Based on A/O nitrogen removal process and the kinetic model

Benchmark Simulation Model No.1

two significant factors

nitrate nitrogen and dissolved oxygen

affecting nitrogen removal in wastewater treatment process are considered. Linear active disturbance rejection control (LADRC) is adopted to realize the removal of nitrogen. The control laws designed for nitrate nitrogen and dissolved oxygen do not rely on faithful mathematical models

which make the effluent quality of wastewater be robust enough to uncertainties and fluctuant factors

and nice performance is obtained. Dynamic simulation results show that LADRC has better performance. It can improve the efficiency of nitrogen removal and the effluent quality of wastewater.