Polymeric and organic membrane filter modules, namely, microfiltration units and nanofiltration units for use in treatment of aqueous solutions; filtration apparatus in the nature of filters made of polymeric and organic membranes for filtration of aqueous solutions; filtration materials, namely, polymeric membranes and organic membranes for microfiltration, ultrafiltration, nanofiltration and distillation of aqueous solutions; filters and modules for microfiltration, ultrafiltration, nanofiltration and distillation of aqueous solutions; racks specifically adapted to hold aqueous solution filtration equipment in the nature of polymeric and organic membrane filtration units; racks specifically adapted to hold solvent based fluid filtration equipment in the nature of polymeric and organic membrane filtration units; polymeric and organic membranes sheets for use in connection with filtering apparatus for aqueous solution filtration.;