Synergism of cellulase, pectinase and xylanase on hydrolyzing differently pretreated sweet potato residues.

The synergism of cellulase (C), pectinase (P), and xylanase (X) for the saccharification of sweet potato residues (SPR) was investigated. The removal of starch from SPR was easily achieved by using amylase, but the cellulose conversion of de-starched SPR was relatively low, thus dilute HSO, NaOH, and HO pretreatment was conducted to improve the enzymatic digestibility. The lignin content of NaOH pretreated SPR was the lowest, whereas HSO pretreatment resulted in the lowest contents of hemicellulose and pectin.