摘要:
A system and method for managing an ethanologen for use in biorefinery is disclosed. The method for propagating ethanologen for use in the production of a fermentation product from biomass comprises the steps of providing a medium for propagation of ethanologen; supplying a first cell mass of ethanologen to the medium; supplying xylose to the medium as a carbon source for the ethanologen; and maintaining the medium comprising the first cell mass of ethanologen at a pH of between about 5.0 and 6.0 and at a temperature of between about 26 and About 37 degrees Celsius so that the first cell mass of ethanologen is propagated into a second cell mass of ethanologen. The second cell mass of ethanologen is larger than the first cell mass of ethanologen. The system for propagating ethanologen for use in the production of a fermentation product from biomass comprises a first stage comprising a first vessel configured to maintain a medium comprising ethanologen; a second stage comprising a second vessel configured to maintain a medium supplied from the first stage; a source of xylose to be provided to the medium as a carbon source for ethanologen in the first stage; and a source of xylose to be provided to the medium as a carbon source for the ethanologen in the second stage. The ethanologen has a first cell mass when supplied to the first stage and the ethanologen has a second cell mass when supplied from the first stage to the second stage and the ethanologen has a third cell mass when supplied from the second stage. The second cell mass is at least 200 times larger than the first cell mass The third cell mass is at least 20 times larger than the second cell mass.
摘要:
The present invention is related to methods of propagating one or more organisms by using a carbon source that includes xylose (e.g., xylose syrup from pretreating lignocellulosic feedstock) and/or a nutrient source that includes a stillage component (e.g., thin stillage derived from a corn-to-ethanol process) in the propagation medium. The organisms include those that can convert one or more monosaccharides into an alcohol via fermentation, such as yeast. The present invention is also directed to related compositions.
摘要:
A system for collecting biomass for the production of ethanol is disclosed. Also disclosed is a method for collecting biomass. The method comprising: harvesting biomass with a combine, wherein a first portion of the biomass is substantially forced against the ground and a second portion of the biomass passes through the combine and forming bales comprising the second portion of the biomass. According to an aspect, the bales comprise a majority of the second portion of the biomass and a small part of the first portion of the biomass.
摘要:
The present invention relates to systems and methods for propagating yeast using a feedstock material such as starch and one or more enzymes (e.g., an enzyme cocktail) to break down the feedstock material into one or more monosaccharides at a sufficient rate so that the yeast can use the monosaccharides as a carbon source for producing more yeast cells while not producing an undue amount of alcohol.