Influence of temperature on kinetics and hydraulic retention time in discontinuous and continuous anaerobic systems

Anaerobic digestion (AD) is a biological treatment susceptible to temperature variations. The Arrhenius model and the Van´t Hoff-Arrhenius relationship analyze effect in AD first-order kinetic constant (k). Kinetic data relevant for estimating hydraulic retention time (HRT) continuous reactors. This research aimed evaluate behavior of constants concerning using influence as estimators HRT. evaluation analyzed k fit Van’t relationship. used methane yield (B0) kinetics from literature, corresponding macroalgae (MA) (25, 35, 45oC), swine manure (SM) 30, 35oC), co-digestion chicken with sawdust miscanthus (CM) (35, 40, 42oC). fitted reduced intervals (?T = 5°C). HRT analysis mass balance considering 80% maximum B0 compared technical at 80 (T80) 90% (T90) B0. results indicate that calculation sensitive below 0.13 d-1.