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This paper illustrates a model for the automation of a tubular Biodigester, using UML specification. Some general topics for design and construction of Biodigester are showed. The UML model of Use Case, Class and sequence is done with the software tool astah*community 6.5.1. Writing the procedure for construction of tubular Biodigester, considering the specific characteristics of organic matter, their dimensioning and production estimates. Then, show measurements results of technical parameters in the Biodigester as the retention time, pressure, biogas volume and temperature of the surroundings, in the simple environment and in the other controlled. In the automated system performs the control of temperature and process of homogenization of the mixture within the Biodigester.