Methane production from orange peel pressing liquid: A kinetic study

Abstract

This paper studies the anaerobic fermentation of orange peel pressing liquid (OPPL), in semi‐continuous digesters under thermophilic conditions (50, 55 and 60°C), using rabbit manure as inoculum which has been previously conditioned to substrate and temperature. Experimental data have been fitted, at each temperature, to the Chen and Hashimoto model. Kinetic parameters governing the process have been obtained. It can be observed that both μ_m and K decrease when temperature increases, within the studied range, whereas the calculated minimum hydraulic retention time, θ_m, increases with temperature, as tested experimentally.

Keywords:

• Kinetics
• fermentation
• methane production
• anaerobic wastewater treatment