| abstract |
This invention relates to a method of changing a molecular structure of a biomass feedstock. The method comprises processing a pretreated biomass feedstock to produce a product in which the processing comprises contacting with a microorganism and/or enzyme. The products are alcohols, organic acids, proteins, hydrocarbons, or sugars, and the pretreated biomass feedstock is obtained by pretreating a biomass feedstock using two or more different pretreatment methods that each change the molecular structure of the biomass feedstock. The different pretreatment method is radiation, sonication, pyrolysis, and/or oxidation. |