Determinação experimental e simulada da produção de biogás usando o ADM1: calibração do modelo

Abstract

Among the mathematical models that aim to understand and optimize the biogas production process (PB), the anaerobic digestion model 1 (ADM1) stands out. The main limiting factors for the implementation of ADM1 refer to its calibration. Given this, the present study aimed to adjust ADM1 for BP using glucose and diluted pigmanure. The production of experimental biogas occurred for hydraulic retention time (HRT) of 13 days in a batch regime, and the analysis of the biogas produced was carried out via gas chromatography. The simulated production was obtained from MATLAB® the adjustment of biochemical, physical-chemical, and operational parameters. The average daily accumulated volume of experimental biogas obtained was 160mL•day-1,with9.03mL•day-1 below the simulated value (R2of0.98).The percent concentrations of CO2 (60%and52%) and CH4 (40%and48%) predicted in simulation for a 6 days HR Tagreed with those measured experimentally, respectively.In this context, it is concluded that the calibrated model can be used as a forecasting basis for the production of biogas in conditions similar to that observed by this study