Modelling the anaerobic digestion of wastewater derived from the pressing of orange peel produced in orange juice manufacturing.
A kinetic model of the anaerobic digestion of wastewater derived from the pressing of orange peel is proposed. The process was conducted in a laboratory-scale, completely stirred tank reactor operating in batch mode at mesophilic temperature. The anaerobic biodegradability of the physical-chemical pre-treated wastewater was found to be 84%, while methane yield coefficient was 297NmL CH(4)/g COD removed. The mathematical model based on six segregated differential equations simulated the evolution of the concentration of carbon in different forms from biodegradable and non-biodegradable substrate. The transformation steps followed first or second-order kinetics. The kinetic constants corresponding to these stages were found to decrease markedly with the load added to the reactor, showing the occurrence of an inhibition process. The small deviations obtained between the experimental and simulated values demonstrated the suitability of the mathematical model in predicting the behaviour of the microorganisms involved in the anaerobic digestion of this wastewater.
Departamento de Química Inorgánica e Ingeniería Química, Facultad de Ciencias, Universidad de Córdoba, Campus Universitario de Rabanales, Edificio C-3, Ctra. Madrid-Cádiz, km 396, 14071-Córdoba, Spain.
María de Los Angeles Martín
Mde L
Santos
José Angel Siles
JA
López
Arturo Francisco Chica
AF
Pérez
Antonio Martín
AM
Martín
D000693:Anaerobiosis; D001628:Beverages; D032084:Citrus sinensis; D019649:Food Industry; D007220:Industrial Waste; D007700:Kinetics
D007220:Industrial Waste