Effect of Pectolytic Enzyme ROHAPECT D5L SPECCIAL on Juice Extracting and Clarifying of Kiwifruit Juice

This paper studies the effect of pectolytic enzyme ROHAPECT D5L SPECCIAL on viscosity, automatic drops yield and clarity of clarified kiwifruit juice by the orthogonal design test. The results showed that this enzyme effectively decreased viscosity of kiwifruit juice, hydrolysed pectin and increased automatic drops yield from pulp to 144.18%～174.42% compared with CK. The clarity and stability after heating and freezing of the juice were improved by treatment of the enzyme. The best treatment would be got in 3PA/100 g pulp(equal 63 g dry enzyme /1 000 kg pulp) at 45 ℃,150 min. In statistics it would be possible to got equal result in 3PA/100 g pulp(equal 63 g dry enzyme /1 000 kg pulp) at 35 ℃, 50 min treatment.