Model and control of N-removal in sewage treatment based on mixed logical dynamic method

In this paper optimization of N-removal in sewage treatment is accomplished by exploiting mixed logical dynamic method (MLD). According to simplifying activated sludge process (ASP) are established by employing expert experience about activated sludge process. Then predictive control approach is applied to optimal control of this process. The simulation results show that it can cover the relative expert experiences more widely by applying MLD to modeling and control of activated sludge process. These expert experiences combined with continuous variable model make model more precise and can get better effect of optimization and control. This study provides a new approach to the research of sewage treatment.