Methods using peracids for controlling corn ethanol fermentation process infection and yield loss

摘要

A process for the use of peracid compositions to eliminate and/or control the growth of undesirable bacteria, including contaminating bacteria, in the fermentation production of alcohol is disclosed. Beneficially, the peracid compositions and methods of use of the same do not interfere or inhibit the growth or replication of yeast and have low or no adverse environmental impact.

主权项

1. A method for reducing and/or eliminating microbial populations of yield loss organisms in a biofuel fermentation system comprising:
applying a peracid composition to sanitize a biofuel fermentation system, wherein the peracid composition comprises a medium chain peracid and peroxyformic acid and wherein the fermentation system comprises one or more fermentation vessels, pipes and/or components; providing or obtaining a mash source in said fermentation system; fermenting the mash source in the presence of at least a residual portion of the peracid composition with yeast to produce ethanol and a solids content; and reducing and/or eliminating the microbial populations of yield loss organisms in said fermentation system, wherein the yield loss organisms are lactic acid bacteria and/or acetic acid bacteria, and wherein said peracid composition does not carry through the fermentation process in amount or concentrations in the solids content that cause animal feeding concerns.