FLOCCULATION OF LIGNOCELLULOSIC HYDROLYZATES

摘要

A method of separating a lignin-rich solid phase from a solution, comprising: pretreating a lignocellulosic biomass with a pretreatment fluid having to remove soluble components, colloidal material and primarily lignin containing particles; separating the pretreated lignocellulosic biomass from the pretreatment fluid with soluble components, colloidal material and primarily lignin containing particles; flocculating the separated pretreatment fluid with soluble components, colloidal material and primarily lignin containing particles using PEO or CPAM as a flocculating agent; and filtering the flocculated separated pretreatment fluid with soluble components, colloidal material and primarily lignin containing particles to remove agglomerates.

主权项

1. A method of separating a lignin-rich solid phase from a solution, comprising:
dividing a lignocellulosic biomass having an acidic pH and aromatic components into a residual lignocellulosic biomass, and a suspension comprising soluble components, colloidal material, and primarily lignin containing particles, using a pretreatment fluid; flocculating the suspension using a sufficient amount of polyethylene oxide (PEO) as a flocculating agent, substantially without added cofactors, to achieve a reduction in turbidity of about 99.5%; and separating the flocculated suspension to remove agglomerates.