Stabilized chlorine dioxide to preserve carbohydrate feedstocks

摘要

A process to preserve a carbohydrate feedstock against contaminant microorganisms comprises contacting the carbohydrate feedstock with a stabilized chlorine dioxide at a pH of at least 2.6. The carbohydrate feedstock preferably comprises a naturally-occurring carbohydrate, particularly a carbohydrate having a reducing end group. The process is particularly suitable to treat feedstocks used in biorefining processes, such as in ethanol fermentation.

主权项

1. A process to preserve a carbohydrate feedstock against microorganisms comprising contacting the carbohydrate feedstock in a unit operation wherein a unit operation is storage or transport with a stabilized chlorine dioxide at a pH of at least 2.6 prior to use of the carbohydrate feedstock as a fermentable sugar and in the absence of added acid to generate chlorine dioxide, wherein the concentration of the carbohydrate is at least 1%, by weight of the feedstock, and the amount of stabilized chlorine dioxide added is 10 to 10000 mg/kg as ClO2, based on total feedstock weight.