Research on the compound enzymatic extraction process of pectin from passionflower peel

Passionflower peel was used as raw materials in the reseach.With enzyme solution p H, hydrolysis time, hydrolysis temperature, enzyme concentration and ratio of liquid to material as single factors, the effects of four kinds of enzyme ( cellulase, hemicellulase and lignin enzymes, amylase) on pectin extraction from the passionflower peel were studied. And the enzyme combination consists cellulose, hemicellulase and lignin enzymes were determined. Through L₉ ( 3⁴) orthogonal experiment and response surface test, the enzymatic hydrolysis and enzyme concentration were optimized. the optimal enzymatic hydrolysis conditions were as follows: cellulose enzymes 0.8 g/100 g, hemicellulase 1.2 g/100 g, and lignin 0.2 g/100 g, ratio of liquid to material ( m L/g) 6∶ 1, p H value 4, extraction lasts for 3.5 h under the temperature of 40 ℃, the pectin gain rate can reach2.63% ± 0.021%.