Anaerobic digestion of carbohydrate and protein-based wastewaters in fluidized bed bioreactors

M. FUENTES; N.J. SCENNA; M.C MUSSATI; P.A. AGUIRRE

LATIN AMERICAN APPLIED RESEARCH

UNS-CONICET Printing Office

Año: 2007 vol. 37 p. 235 - 242

0327-0793

The present work is focused on evaluating the anaerobic digestion of complex substrates (proteins and carbohydrates) in anaerobic fluidized bed reactors (AFBRs). In a previous paper, an AFBR model was adjusted using only the experimental data obtained during the acclimatization stage (glucose and acetate-based feeding) of two mesophilic bioreactors. Here, the sensitivity of that model to represent the digestion processes of proteins such as gelatin and albumin, and sucrose as a carbohydrate, is analyzed. Some kinetic expressions and parameters for the enzymatic hydrolysis processes need to be modified to represent the real behavior of bioreactors. Under the analyzed operating conditions, a hydraulic retention time higher than 1 day is suggested to ensure good system efficiency. Keywords−− Anaerobic processes, biofilms, complex substrates, dynamic modeling, fluidized bed bioreactor, wastewater treatment. −− Anaerobic processes, biofilms, complex substrates, dynamic modeling, fluidized bed bioreactor, wastewater treatment.