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Abstract

A high yield method for fermenting carbohydrate to ethanol and prevention and/or disruption of biofilms, comprising: a) mixing a fermentation feedstock with a fermentation broth containing yeast and/or an enzyme, b) treating said mixture by adding a composition to the fermentor containing: 10-90 wt. % of an aldehyde selected from the group consisting of formaldehyde, para-formaldehyde, glutaraldehyde, another antimicrobial aldehyde, and mixtures thereof, 1-50 wt. % of a surfactant having an HLB from 4 to 18, 0-20 wt. % of an antimicrobial terpene, or essential oils, 1-50 wt. % of organic acids selected from Ci to C24 fatty acids, their salts, glycerides and esters thereof, and 1-50 wt. % water; wherein the concentration of aldehyde in the fermentor is from about 0.25 to 3 kg/MT of fermentation feedstock, and c) isolating ethanol.

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First Claim