Optimisation of double-enzymatic extraction of arabinoxylan from fresh corn fibre

摘要

Enzymatic extraction of arabinoxylans (AXs) is an attractive and environmentally friendly extraction option, in which technical considerations (yield and purity) have been coupled with environmental concerns. Amano HC 90 and Cellulase were combined to evaluate their interactive effects on AX extraction from destarched, deproteinised bran (DSDPB). A response surface methodology was used to obtain the optimal extraction conditions. The experimental data fit well with the predicted values and the model adequately represented the actual relationship among the measured parameters. The extraction yield and AX content in the extract under optimal conditions (double-enzyme dose of 920 U/g, pH of 3.0, extraction temperature of 35.0 degrees C; extraction time of 6 h; and DSDPB to liquid ratio of 1:30) were 40.73 +/- 0.09% and 75.88 +/- 0.11%, respectively. The double-enzymatic extraction method of AX from fresh corn fibre was more efficient than the chemical method.