Biogas Production from Textile Wastewater via Mesophilic Fermentation: Numerical Analysis

The investigation of the sludge fermentation procedure used to generate biogas is presented in this paper. Actually, this study focuses on the examination of a mesophilic anaerobic digestion of textile wastewater using numerical modeling. To prevent any thermal losses during the fermentation process, the modeling of thermal and mass exchanges is done in the initial phase. The mathematical model used is established on that presented by Guo et al. The results show that the heat losses through the digester's walls are the most crucial factor to control. In the second phase, the progression of the pressure and methane concentration within the digester are examined. The simulation method is based on the general two-film theory model of mass transfer. The results demonstrate that the amount of biogas progress decreases with the organic matters in the sludge. In addition, as it is proved by the literature, the pressure of the generated biogas does not surpass 4 bars during the fermentation process.