DIAGNOSIS EXPERT-SYSTEM FOR THE ACTIVATED-SLUDGE PROCESS USING BIOTA OBSERVED BY MICROSCOPIC EXAMINATION

A diagnosis expert system for the activated sludge process was develop ed in conformity to our experience and reported studies. Using the bio ta observed by microscopic and data measurement easily obtained, i.e. pH or DO etc., the process treatability or the activated sludge condit ion was diagnosed and evaluated by this system. In this paper, the eff ectiveness of the diagnosis expert system was investigated using the m icroscopic and measurement results from both the actual sewage treatme nt plant and the bench-scale experiment. As a result, the low loading and the progress of nitrification were presumed in the case of the act ual plant and the variations of treatment condition depending on DO se t values were evaluated satisfactorily in the case of the bench-scale experiment. Therefore, it was shown that this system was applicable to the diagnosis of the activated sludge process.