Modelagem, simulação e controle de fermentação alcoolica continua em escala industrial

AUTOR(ES)
DATA DE PUBLICAÇÃO

1994

RESUMO

The aims of this work concern with the development of an optimal design of an industrial plant for continuous alcohol fermentation and the development of the most adequate control strategy for such a plant. Through mathematical modeling and computer simulation an optimal design was obtained, for the Brazilian industrial operating conditions, which consists of 4 (four) well-mixed fermentors linked in series, with the following volume distribution retated to the fermentor total volume: 20.96% for fermentor 1, 26.72% for fermentor 2, 31.56% for fermentor 3, and 20.76% for fermentor 4. The control system consist of two "SISO" (Single Input - Single Output) loops. One controls the temperature of each fermentor, through manipulating out-flow chilling. The other controls TRS (Total reductor sugars) concentration in the efluent from fermentor 4, manipulating the .feed medium. The FEEDBACK control strategy was adopted for its excellent performance and for being the less complex as well as presenting the lowest cost, fitting therefore the requirements of industrial units. The control law used for the temperature loop was the proportional and for the TRS loop the PI {Proportional-Integral) and PID (Proportional-Integral-Derivative) laws. The parameters for controllers PI and PID were .adjusted according to the ZIEGLER-NICHOLS procedure.

ASSUNTO(S)

destilarias alcool modelos matematicos fermentação

ACESSO AO ARTIGO

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