Distillerie Mazzari is equipped with an anaerobic digestion plant, where the highly biodegradable residues of distillation are processed.
The anaerobic digestion plant consists of four cylindrical digesters of 6.000 m3 each. Three reactors act as primary digesters and are fed directly with the stillage coming out from the production process, the fourth reactor is a secondary digester, which is fed with the overflow of the three primary ones.
From the anaerobic digestion process we produce biological gas (biogas) which, once purified, is sent to the endothermic enginees for the production of eletrical and thermal energy. The digestate undergoes, through the flotation plant, the separation of the solid part from the liquid one.
The solid fraction is filtered into belt filter presses and stored on hold of its final use in agriculture (fertilizer), while the water obtained from the flotation and filtration processes is sent to the aerobic depuration process.