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Problems related to the control of complex biotechnological processes were considered on the example of biooxidation of refractory gold-arsenic sulphide concentrates for the subsequent gold recovery. Two possible approaches to the problem were considered: a) building “mechanistic” mathematical model and b) applying neural network model. An attempt to construct a mixed mechanistic-phenomenological model using various combinations of formulas given in literature and general description of bioleaching processes has given not satisfactory result. The models were able to describe only the general properties and trends of the process. Neural network analysis of time series of the bioleaching process has revealed dependences between the process, control parameters, and feed composition. Obtained 10% level of the forecast error (MAPE) is quite satisfactory if compare with the forecasts of any natural ecosystem. It can be argued that the relatively low complexity of neural network indicates the possibility of developing a fairly simple mechanistic model of the bioleaching process.

žurnal sibirskogo federalʹnogo universiteta. biologiâ/žurnal sibirskogo federalʹnogo universiteta. seriâ biologiâ

The Application of Mechanistic Mathematical and Connectionist Models in the Control of Biotechnological Processes in the Context of Refractory Gold-Arsenic Sulphide Ores Concentrates Oxidation