Fuzzy model and decision of COD control for an activated sludge process

An approach for fuzzy modeling and decision is presented based upon fuzzy logic inference. Modeling and decision making for process control in a real-world activated sludge process were studied. The modeling work for the process is based upon some historical on-line measurable and off-line sampling data from the process, and process operational experience. Some calculated data for the modeling resulted from estimation of the developed model. The method of estimation is also briefly introduced in this article. Performance of the fuzzy strategies or fuzzy decisions has been tested by comparing some results of fuzzy decision against results of simulation on dynamic mathematical models for the same process. The test results are satisfactory. (C) 1998 Elsevier Science B.V.