Process for the reutilization of yeast biomass

Abstract

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. It describes a process that provides for the reuse of yeast biomass used in the alcoholic fermentation of both sugarcane and corn in independent or integrated processes with steps of separation and reuse of solids prior to distillation and which are used in the process itself and in other industrial applications such as the production of high protein content (DDG / DDGS) ration, due to the alcohol recovery of the process, biodiesel, cell wall and yeast extract, as well as energy generation. The process also includes a drying step using indirect contact dryers operating with low pressure, non-noble vapors, such as plant vapor and exhaust vapor, and with the recovery of the ethanol contained in the wet cake.

Description

1 / 1 Process For Reutilization Of Yeast Biomass Brief Description

[001] This application refers ta patents of invention for an unprecedented 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, which refers to a process that provides for the use of yeast discarded in the alcoholic fermentation of sugarcane to be used in the alcoholic fermentations of corn and other starch substrates, thus providing the integration of ethanol production processes from sugarcane and corn, which allows the reduction of corn fermentation time, the correct disposal of a product that would be discarded, as well as the separation of solids before wine distillation and ethanol recovery from the corn wet cake. Field Of Application

[002] The present invention pertains to the field of biotechnology and biochemistry, to the sector of fuel production, obtained from fermentative processes. Motivating Reason

[003] The use of fossil fuels has been increasingly discouraged by the automobile industry, proof of this is the increased use of flex-fuel engines. With this growing disincentive, the ethanol-producing distilleries have invested in technologies that increase the efficiency of their production and improve their product. In Brazil, most commercialized ethanol is produced with sugar cane, but the use of other substrates, such as corn is also viable and a good alternative to be used not only in the sugarcane harvest, but throughout the year.

[004] For the production of ethanol, yeasts are used far alcoholic fermentation, in which yeasts convert the sugar present in the substrate into cellular energy, to be used in their metabolism, and as a metabolic residue, yeasts produce ethanol and carbon dioxide. Date rec;:ue I Received date 2024-12-06

Claims

Date reçue / Received date 2024-12-06 10 / 11 CLAIMS 1. A process for 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 I) drying the vinasse with the wet cake so as to obtain Distillers Dried Grains (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 I); and / or r) processing the dry yeast so as to obtain solid animal food and / or obtain cell wall and / or obtain yeast extract. Date reçue / Received date 2024-12-06 11 / 11 2. The process of claim 1, further comprising: pressing the wet cake obtained in step f) so as to reduce a moisture content of the wet cake from 25% to 15%, prior to drying the wet cake in step I).

3. The process of claim 1 or 2, wherein the drying of step I) is performed by at least one indirect contact dryer.