Conclusion
In this study, the effect of the different pectinase pretreatment
conditions (enzyme concentration, incubation time and
temperature) on the viscosity of lemon juice was investigated.
Lemon juice enzymatically treated under the optimal (enzyme
concentration 600 U/L, incubation time 45 min and incubation
temperature 30 ◦C) conditions has a turbidity of 800 NTU and
a viscosity of 4.7 mPa s. The optimized treatment with pectinase
followed by UF led to a clear and stable lemon juice with
a reduction of more than 96% in viscosity and turbidity