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Thermophilic anaerobic digestion of model organic wastes: Evaluation of biomethane production and multiple kinetic models analysis

Nguyen, Dinh Duc, Jeon, Byong-Hun, Jeung, Jae Hoon, Rene, Eldon R., Banu, J. Rajesh, Ravindran, Balasubramani, Vu, Cuong Manh, Ngo, Huu Hao, Guo, Wenshan, Chang, Soon Woong
Bioresource technology 2019 v.280 pp. 269-276
agricultural wastes, anaerobic digestion, biogas, cattle, kinetics, methane, methane production, models, organic wastes, slaughterhouses
The main aim of this work was to test various organic wastes, i.e. from a livestock farm, a cattle slaughterhouse and agricultural waste streams, for its ability to produce methane under thermophilic anaerobic digestion (AD) conditions. The stability of the digestion, potential biomethane production and biomethane production rate for each waste were assessed. The highest methane yield (110.83 mL CH₄/g VSₐddₑd day) was found in the AD of crushed animal carcasses on day 4. The experimental results were analyzed using four kinetic models and it was observed that the Cone model described the biomethane yield as well as the methane production rate of each substrate. The results from this study showed the good potential of model organic wastes to produce biomethane.