Fig. 9
Mechanism diagram of Fenton + B-8 pretreatment: Fenton pretreatment changed the surface morphology of the RS. Free radicals cleaved the internal glycosidic bonds of cellulose and hemicellulose, caused fiber surface oxidation, and disrupted lignin’s close association with hemicellulose. Simultaneously, the lignin droplets migrated to the surface. When bacterial cells were inoculated into this system, they adhered to the surface of the RS to further cleave and/or dissolve the lignin as modified by the Fenton pretreatment