Dow Brasil Sudeste Industrial Ltda

Abel Oliveira

Yuri Alencar Marques

Yuri Alencar

José Sebastião De Sa

The method of producing bioethanol by sugarcane fermentation is improved by using a polyalkylene glycol with a hydroxyl functionality of greater than 2 as a foam controlling agent.

Foam control of alcoholic fermentation processes

The invention provides processes for the extraction of sugar from sugar-bearing plant material such as sugar cane. Accordingly, in one aspect of the invention, a process for extracting sugar from sugar-bearing plant material comprises contacting the sugar-bearing plant material with an extractant solution comprising water and a surfactant; and separating the extractant solution from the sugar-bearing plant material. One example of a suitable surfactant is a poly(alkylene oxide) polymer such as a poly(propylene oxide) polymer, a poly(ethylene oxide) polymer, or a poly(propylene oxide)/(ethylene oxide) copolymer.

Processes for extraction of sugar from sugar-bearing plant material

A method of producing a fermentation-based product, such as ethanol, comprises fermenting a sugar-containing medium with yeast in the presence of an aliphatic or aromatic monoaldehyde or dialdehyde, a formaldehyde-releasing compound, or a combination thereof, in an amount sufficient to reduce or control a bacterial population in the sugar-containing medium. The additive may enable reduction or elimination of antibiotics for this purpose, while showing reductions in percent infection, process variability and interference with yeast viability.

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Sao Paulo, Brazil

Abel Oliveira