A system for separating whey proteins from whey, said system comprising: a filtration unit comprising a bottom plate at a first extremity, a top plate at a second extremity opposite to the first extremity, a permeate spacer placed proximate to and in spaced apart relation with respect to the bottom plate , at least one porous filter placed proximate to and in spaced apart relation with respect to the permeate spacer and a gasket provided between the porous filter and the top plate ; the filtration unit defining an input port , a permeate port and a retentate port ; the porous filter comprising cotton cloth having an ion exchange element deposited thereupon; a feed storage unit connected to the input port of the filtration unit via a first pump ; an eluent storage unit connected to the input port of the filtration unit via a second pump ; a first set of tubing comprising an input end , a first output end , a second end , a first valve for controlling an amount of fluid flowing out of the first output end and a second valve for controlling an amount of fluid flowing out of the second output end , the input end being connected to the permeate port , the first output end being connected to the feed storage unit and the second output end being connected to the eluent storage unit ; and a second set of tubing comprising a input end , a first output end , a second end , a first valve for controlling an amount of fluid flowing out of the first output end and a second valve for controlling an amount of fluid flowing out of the second output end , the input end being connected to the retentate port , the first output end being connected to the feed storage unit and the second output end being connected to the eluent storage unit . a filtration unit comprising a bottom plate at a first extremity, a top plate at a second extremity opposite to the first extremity, a permeate spacer placed proximate to and in spaced apart relation with respect to the bottom plate , at least one porous filter placed proximate to and in spaced apart relation with respect to the permeate spacer and a gasket provided between the porous filter and the top plate ; the filtration unit defining an input port , a permeate port and a retentate port ; the porous filter comprising cotton cloth having an ion exchange element deposited thereupon; a feed storage unit connected to the input port of the filtration unit via a first pump ; an eluent storage unit connected to the input port of the filtration unit via a second pump ; a first set of tubing comprising an input end , a first output end , a second end , a first valve for controlling an amount of fluid flowing out of the first output end and a second valve for controlling an amount of fluid flowing out of the second output end , the input end being connected to the permeate port , the first output end being connected to the feed storage unit and the second output end being connected to the eluent storage unit ; and a second set of tubing comprising a input end , a first output end , a second end , a first valve for controlling an amount of fluid flowing out of the first output end and a second valve for controlling an amount of fluid flowing out of the second output end , the input end being connected to the retentate port , the first output end being connected to the feed storage unit and the second output end being connected to the eluent storage unit . <EOS>