decreased afterwards. The best results were obtained employing the
biomass association Lb:Zym 1:1 (80 + 80 mg) and 1:10
(15 + 145 mg), with a CO2 production increase more than 73% respect
to the mathematical sum of the CO2 produced by the two microorganisms separately used.
The calculated productivity gain showed a decreasing trend in all trials: positive performances of the microbial combination were maintained up to 180 min with the combination Lb:Zym 1:1 (from 231 to