The extraction of various substances, such as raw liquid extract, from a solid hardwood or hardwood pulp is a common and necessary process when making paper or other cellulose-based materials. Hardwood naturally contains substances useful for processing into bio-fuel byproducts. One of the process difficulties contributing to the lack of commercial success is the difficulty in separating lignin from hardwood extract in a commercially viable manner. This technology describes a system and method for hardwood pulp liquid hydrolysate conditioning A system and method for hardwood pulp liquid hydrolysate conditioning to remove lignin, allowing the use of raw wood extract to be used to create products such as organic acids and sugars suitable for fermentation.
US Patent 8,608,970