2013 journal article

Sodium sulfite-formaldehyde pretreatment of mixed hardwoods and its effect on enzymatic hydrolysis

BIORESOURCE TECHNOLOGY, 135, 109–115.

co-author countries: China 🇨🇳 United States of America 🇺🇸
author keywords: Mixed hardwoods; Sodium sulfite-formaldehyde; Pretreatment; Enzymatic hydrolysis; Sugar
MeSH headings : Carbohydrate Metabolism / drug effects; Cellulase / metabolism; Formaldehyde / pharmacology; Glucans / analysis; Hydrogen-Ion Concentration / drug effects; Hydrolysis / drug effects; Lignin / metabolism; Sulfites / pharmacology; Temperature; Time Factors; Wood / drug effects; Wood / metabolism
Source: Web Of Science
Added: August 6, 2018

In this work, mixed hardwoods were pretreated by sodium sulfite-formaldehyde (SF). The effects of SF pretreatment on the chemical compositions and enzymatic hydrolysis of mixed hardwoods were investigated. SF pretreatment temperature had a significant effect on pulp yield and delignification, resulting in an increased efficiency of enzymatic hydrolysis. After 96 h of enzymatic hydrolysis at the cellulase loading of 40 FPU/g substrate, the yields of glucan and xylan on the basis of original wood were 37% and 11% for the pulp produced with 12% sulfite charge at 170 °C for 2 h. The total sugar recovery based on the sugar in original wood was 74%. These results indicate that sulfite-formaldehyde cooking is of great potential to be a pretreatment method for a greenfield mill to produce fuel ethanol from hardwood.