Process for the reutilization of yeast biomass, with separation of solids prior to distillation and recovery of ethanol from wet cake, in the integration of alcoholic fermentations of sugarcane and amylaceous substrates and/or for amylaceous-dedicated distilleries

A process for the reutilization of yeast biomass, comprising the steps of:

• a) milling corn to obtain milled corn;
• b) pre-treating the milled corn with sugarcane vinasse, condensed water, and/or flegmass;
• c) hydrolyzing the mixture of step b;
• d) cooling the mixture of step c;
• e) fermenting the mixture of step d using yeast so as to obtain crude wine, the yeast being sourced from prior fermentation;
• f) centrifuging the crude wine so as to obtain a wine+yeast+oil mixture and a wet cake;
• g) centrifuging the wine+yeast+oil mixture so as to obtain cream of yeast and a wine+oil blend;
• and
• h) distilling the wine+oil blend so as to obtain vinasse+oil;
• i) optionally processing the vinasse+oil according to a first process;
• and
• j) further processing the cream of yeast according to one or both of a second process and a third process;
• wherein the first process comprises the steps of:
• k) concentrating and separating the vinasse+oil so as to obtain vinasse;
• and
• l) drying the vinasse with the wet cake so as to obtain DDGS;
• wherein the second process comprises the steps of:
• m) pre-fermenting the cream of yeast;
• and
• n) utilizing the yeast in step e;
• wherein the third process comprises the steps of:
• o) sending the cream of yeast to an endogenous fermentation tank so as to increase its protein content;
• p) washing and centrifuging the cream of yeast so as to obtain dry yeast;
• q) adding the dry yeast to the wet cake used in step l;
• and/or
• r) processing the dry yeast so as to obtain solid animal food and/or obtain cell wall and/or obtain yeast extract.