Direct contact membrane distillation for the concentration of clarified orange juice

Experimental results indicated that, at high concentration, the transmembrane flux decay can be mainly attributed to the increasing of the juice viscosity. Moreover, analytical measurements proved that all the antioxidant compounds of the clarified orange juice are well preserved through the DCMD process. Therefore, the UF/DCMD integrated process may be used to obtain high quality concentrated juices, as in the final product the organoleptic, nutritional and antioxidant properties of the fresh juice are efficiently preserved.