The stabilization of organic waste is related to the mineralization of part of its organic compounds. Many parameters have been used as indicators of the mineralization of organic streams (Al Momani et al., 2004; Tambone et al., 2009): (1) COD/DOC ratio, where lower ratios imply a higher degree of mineralization; (2) the average oxidation state (AOS – Eq. (3)), which ranges from +4 for CO2, the most oxidized state of C, and 4 for CH4, the most reduced state of C; or (3) the COD/TKN ratio, which decreased due to COD degradation.