Resumo

DEL REAL OLVERA, Jorge et al. Mathematical simulation of an anaerobic shaken type tank digestor for the treatment of residual spills. Rev. Int. Contam. Ambient [online]. 2009, vol.25, n.1, pp.33-41. ISSN 0188-4999.

In the last years, mathematical modeling has been used to try to represent the chemical changes that occur in the environment. Traditionally the models are based on the mass balance and the kinetic chemistry of the bioprocesses. In this study the equations obtained for a biological isothermal reactor type shaken tank are applied and simulated by using adimensional linear equations in quasi-stationary state. In order to give validity to the results derived from the analytical solution, these are compared with the results experimentally obtained at laboratory level for a methanogenic digester in a mesophyll regime of temperature, used for treating residual effluents from the distillery industry under different operational conditions, using as microbial partnership bovine rumen fluid. The results of the model agree with the production of biogas and the reduction of organic charge (expressed like COD), having an average factor of adjustment for both cases of R²=0.9960 and a variation of 0.01601, when a kinetic reaction of first order is proposed, and using free cells in the environment. In addition this model is able to predict when the system reaches the stationary state.

Palavras-chave : mesophyllic; mathematic simulation; methanogenic; bioprocess.

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