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6201403 
Journal Article 
Identification of a Bio-Methanization Process: A Case Study 
Bastin, G; Chalon, A; Installé, M 
1982 
15 
4 
409-413 
We present the procedure that we have used to obtain a satisfactory mathematical model for a bio-methanization reactor (anaerobic digestion). A non-linear state-space representation (five state variables) is adopted for the digester, which is inspired by the well-known work of Hill-Barth. The influent feed rate, the influent chemical composition and the gas production have been measured once every day for 160 days. From these data, the parameters of the model are, in a first step, calibrated by trial-and-error using a least-squares criterion on the gas production. In a second step, adaptative parameters are identified in order to improve the simulation capabilities of the model. 
Biotechnical processes; Identification; Parameter estimation