Study of the Process of Hydraulic Mixing in Anaerobic Digester of Biogas Plant

摘要: Mixing of an organic substrate is a key factor that increases the anaerobic digestion process efficiency allowing intensification biogas yield by 50%. Results experimental studies industrial apparatuses methane fermentation showed insufficient mixing reduces effective volume digester 70% and major cause equipment failure (Giunter Goldfarb, 1991). Although in digesters great significance because its direct impact on output, specific effects selected mode production are not clear (Sindall, 2013). A number were carried out to evaluate effect performance revealing true cannot fully be detected laboratory scales (Karim et al., 2005). Carrying full-scale experiments excessively expensive often impossible. Besides, with their help it impossible find values characteristics (such as speed, temperature, concentration) throughout solution region. In contrast experiment practically entire region apparatus under study available for computations also there no disturbances introduced sensors. Therefore, at present, numerical widely applied along processes occurring digester. Many papers devoted modelling hydrodynamics heat mass transfer when plant. Maier al. (2010) studied laminar, transitional turbulent regimes using Euler-Euler method. Mândrea (2011) obtained analytical laminar flow cylindrical mechanical