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Kinetics for substrate utilization and methane production during the mesophilic anaerobic digestion of two phases olive pomace (TPOP)

Borja, Rafael, Martin, Antonio, Rincon, Barbara and Raposo, Francisco (2003) Kinetics for substrate utilization and methane production during the mesophilic anaerobic digestion of two phases olive pomace (TPOP) Journal of Agricultural and Food Chemistry, 51, (11), pp. 3390-3395. (doi:10.1021/jf021059n).

Record type: Article


A kinetic study of the anaerobic digestion process of two phases olive pomace (TPOP) was carried out in a laboratory-scale completely stirred tank reactor at mesophilic temperature (35 C). The reactor was operated at influent substrate concentrations of 34.5 (substrate I), 81.1 (substrate II), 113.1 (substrate III), and 150.3 g COD/L (substrate IV). The hydraulic retention times (HRT) ranged between 8.3 and 40.0 days for the most diluted substrate (I) and between 10 and 50 days for the other three influent substrate concentrations used (substrates II-IV). The results obtained demonstrated that the rates of substrate uptake and methane production were correlated with the concentration of biodegradable total chemical oxygen demand (COD), through equations of the Michaelis-Menten type. A mass (COD) balance around the reactor allowed the methane yield coefficient and cell maintenance coefficient to be obtained, which gave values of 0.25 L CH4/g CODt and 0.25 days-1, respectively. The first one was coincident to that obtained through experimental data of methane production and substrate consumption. The kinetic equations obtained and the proposed mass balance were used to simulate the anaerobic digestion process of TPOP and to obtain the theoretical COD of the reactor and methane production rates. The small deviations obtained (equal or lower than 10%) between the values calculated through the model and experimental ones suggest that the proposed model predicts the behavior of the reactor very accurately

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Published date: April 2003
Keywords: kinetics, anaerobic digestion, methane production, substrate consumption, two phases olive pomace (tpop) simulation


Local EPrints ID: 53030
ISSN: 0021-8561
PURE UUID: 8b2fdf3e-30f4-46f4-b3db-1090778f0e67

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Date deposited: 17 Jul 2008
Last modified: 17 Jul 2017 14:39

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Author: Rafael Borja
Author: Antonio Martin
Author: Barbara Rincon
Author: Francisco Raposo

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