Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6375372 | Industrial Crops and Products | 2016 | 7 Pages |
Abstract
For reducing the costs of separating bromelain from its crude extract, a two-stage foam fractionation technology with β-cyclodextrin as an activity protector was developed using the foam fractionation column with vertical sieve trays (VSTs). By studying the effects of VSTs, volumetric air flowrate, β-cyclodextrin concentration, aeration time and temperature, the two-stage foam fractionation technology were optimized. The results show that VSTs effectively improved the activity recovery by enhancing the adsorption of bromelain at the gas-liquid interface while β-cyclodextrin significantly reduced the activity loss induced by the gas-liquid interface. At β-cyclodextrin concentration 0.60 mg/mL, a high specific activity of 165.6 U/mg, 7.4 folds of that in the crude extract, was obtained with an activity recovery of 45.2% by using the optimized two-stage foam fractionation technology. Compared to those without β-cyclodextrin, activity recovery and specific activity obtained satisfactory relative increases of 34.1% and 110.7%, respectively.
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Authors
Rui Li, Linlin Ding, Zhaoliang Wu, Yanji Wang, Wei Liu, Yanyan Wang,