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Kinetic and performance study of a batch two-phase anaerobic digestion of fruit and vegetable wastes

by J. Math-Alvarez, A. Mtz.-Viturtia, P. Llabrés-Luengo, F. Cecchi
Biomass and Bioenergy ()


Anaerobic digestion of a simulated organic fraction of the waste of a central market selling fruit and vegetables was carried out in two-phase digesters in the mesophilic range of temperatures. Batch digestion was prolonged until no biogas was produced (33 days). With digested pig manure as inoculum, maximum biogas production was obtained around day 10, and within 3 weeks the digestion was almost complete. A kinetic analysis was carried out using first-order, Monod and Chen-Hashimoto models. The Chen-Hashimoto model represents the best fit, whereas a first-order model was not consistent with the experimental results.

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