Linearized kinetic models for the simulation of the mesophilic anaerobic digestion of pre-hydrolyzed woody wastes

The most common kinetic models available in the literature to describe the COD consumption during batch anaerobic digestion are checked and compared i n their linearized forms in the case of prehydrolyzed mixtures simulating t he composition of woody wastes. The introduction of the COD value at the en d of batch digestion in both the First Order and the Monod models allows on e to take into account the deviations due to the progressive increase in th e fraction of difficultly-digestible substances present in the medium. The so-modified version of the First Order model as well as that proposed by Si ngh and co-workers not only show the best fits to the experimental data but also demonstrate that they are the simplest and easiest ones for immediate use.