Fuzzy logic control of dynamic anaerobic/aerobic activated sludge system

An anaerobic/aerobic activated sludge system under dynamic loading is difficult to automatically control due to its ill-defined, non-linear, and complex behavior. This study demonstrates the merits of a real-time fuzzy logic controller for such control purposes by comparing it with a conventional proportional (F/M)_an controller. Using the conventional system alongside our proposed system, continuous-flow pilot plant experiments with automatic monitoring and control facilities wore carried out. Five effluent parameters (dissolved COD, dissolved P, total SS, total COD, and total P) were utilized to evaluate their dynamic system performance. Experimental results indicate that, compared to conventional (F/M)_an control, fuzzy logic control significantly improve the effluent concentration.