NOVELTY - Increasing bioalcohol yield from biomass (b1), involves: subjecting carbohydrates extracted from biomass containing residual starches, dextrins, and proteins, to hydrodynamic cavitation treatment to promote additional conversion of the residual starches, dextrins, and proteins into carbohydrates; combining the carbohydrates with bacterial species and nutrients to form fermentation fluid; fermenting the fluid to form bioalcohol solution, followed by subjecting to additional hydrodynamic cavitation treatment so as convert any remaining carbohydrates into bioalcohol.    USE - For increasing bioalcohol yield (claimed).    ADVANTAGE - The method provides improves taste and reduces a smell of the bioalcohol; improves starch to ethanol conversion; and improves mass transfer and reaction rate.    DETAILED DESCRIPTION - A process (P1) for increasing bioalcohol yield from biomass (b1), involves: providing carbohydrates extracted from the biomass, where the carbohydrates contain residual starches, dextrins, and proteins; subjecting the carbohydrates to a hydrodynamic cavitation treatment so as to promote additional conversion of the residual starches, dextrins, and proteins into carbohydrates; combining the carbohydrates with a bacterial species and nutrients to form a fermentation fluid; fermenting the fermentation fluid to form a bioalcohol solution; subjecting the bioalcohol solution to an additional hydrodynamic cavitation treatment so as convert any remaining carbohydrates into bioalcohol. An INDEPENDENT CLAIM is included for a process (P2) for extracting carbohydrates from biomass (b2), involving: preparing the biomass for extraction of carbohydrates; forming a first biomass solution comprising the prepared biomass, water, and acid or an alkali; subjecting the first biomass solution to a first hydrodynamic cavitation treatment at an inlet pump pressure of about 500 psi, where acid or alkali hydrolysis of the biomass occurs; filtering the first biomass solution following the first hydrodynamic cavitation treatment into a first filtrate and an intermediate biomass, where the first filtrate contains extracted carbohydrates; creating a second biomass solution comprising the intermediate biomass, water and an enzyme source; exposing the second biomass solution to a second hydrodynamic cavitation treatment at an inlet pump pressure of 50-150 psi, where enzymatic hydrolysis of the biomass occurs; filtering the second biomass solution following the second hydrodynamic cavitation treatment into a second filtrate and a filtered biomass, where the second filtrate contains extracted carbohydrates.