The inorganic-organic hybrid composite membranes have played a rocking role for separation, concentration, purification and clarification of food industry wastewater. The separation of wastewater produced from post-treatment part of food industry processing using PVC based magnesium molybdate (MM) composite membrane was studied in this paper. The physicochemical and electrochemical studies of composite membrane shows better results from previously reported membranes. In this study, the transport number, mobility ratio and surface charge density of composite membrane play a dominant role for understanding the membrane mechanism and these parameters depend on the concentration of various univalent electrolytes.