material, up to 75% of the total organic fraction, as reported by
Bouallagui et al. [14].
Calculated Bo values for R1 were 0.26 and 0.32 g VSdestroyed
g1 VSadded for HRTs of 25 and 15 d, respectively. R2 reached Bo
values of 0.43 and 0.52 g VSdestroyed g1 VSadded for HRTs of 25 and
15 d, respectively. The addition of 50% VPW to SM anaerobic
digestion resulted in a 63% biodegradability improvement at both
HRTs tested. These results are also in accordance with those previously
reported by Molinuevo-Salces et al. [15], reporting that the