More recently the conventional separation methods have been supplemented by membrane processes due to its advantages. Membrane pervaporation is now widely recognized as an effective technique for the separation of close boiling/azeotropic mixtures, and industrial solvents. The first part of this thesis describes the pervaporatiove separation of various organic solvent/water mixtures by using polymeric and biopolymeric blend membranes. Various characterization techniques were applied to study the interactions of blending polymers, crosslinking, thermal and mechanical properties of...