A screen basket apparatus, comprising: a grid frame having a plurality of openings arranged in a lattice, the grid frame including a plurality of transversal members and a plurality of longitudinal members that define the plurality of openings; and a screen affixed to the grid frame that covers openings in the grid frame, wherein: the screen comprises a plurality of screening cartridge assemblies that includes a first screening cartridge assembly including a first case and a first screen assembly fitted into the first case and a second screening cartridge assembly including a second case and a second screen assembly fitted into the second case, wherein the first screening cartridge assembly is affixed to a first transversal member and a second transversal member and wherein the second screening cartridge assembly is affixed to the second transversal member and a third transversal member, each screen assembly having a screening surface and being a single injection molded piece integrally formed by means of injection molding of a thermoplastic material, wherein screening openings are formed in the screening surface, the screening openings having a substantially uniform width having a size that ranges between approximately 35 microns and approximately 4000 microns, and wherein the screen is configured to separate carbon or resin particles from a slurry of a carbon-in-leach -CIL-, carbon-in-pulp -CIP- or resin-in-leach -RIL- material as fluid of the slurry flows from outside the screen basket apparatus to inside the screen basket apparatus such that the carbon or resin particles remain on the outside of the screen basket apparatus. a grid frame having a plurality of openings arranged in a lattice, the grid frame including a plurality of transversal members and a plurality of longitudinal members that define the plurality of openings; and a screen affixed to the grid frame that covers openings in the grid frame, wherein: the screen comprises a plurality of screening cartridge assemblies that includes a first screening cartridge assembly including a first case and a first screen assembly fitted into the first case and a second screening cartridge assembly including a second case and a second screen assembly fitted into the second case, wherein the first screening cartridge assembly is affixed to a first transversal member and a second transversal member and wherein the second screening cartridge assembly is affixed to the second transversal member and a third transversal member, each screen assembly having a screening surface and being a single injection molded piece integrally formed by means of injection molding of a thermoplastic material, wherein screening openings are formed in the screening surface, the screening openings having a substantially uniform width having a size that ranges between approximately 35 microns and approximately 4000 microns, and wherein the screen is configured to separate carbon or resin particles from a slurry of a carbon-in-leach -CIL-, carbon-in-pulp -CIP- or resin-in-leach -RIL- material as fluid of the slurry flows from outside the screen basket apparatus to inside the screen basket apparatus such that the carbon or resin particles remain on the outside of the screen basket apparatus. the screen comprises a plurality of screening cartridge assemblies that includes a first screening cartridge assembly including a first case and a first screen assembly fitted into the first case and a second screening cartridge assembly including a second case and a second screen assembly fitted into the second case, wherein the first screening cartridge assembly is affixed to a first transversal member and a second transversal member and wherein the second screening cartridge assembly is affixed to the second transversal member and a third transversal member, each screen assembly having a screening surface and being a single injection molded piece integrally formed by means of injection molding of a thermoplastic material, wherein screening openings are formed in the screening surface, the screening openings having a substantially uniform width having a size that ranges between approximately 35 microns and approximately 4000 microns, and wherein the screen is configured to separate carbon or resin particles from a slurry of a carbon-in-leach -CIL-, carbon-in-pulp -CIP- or resin-in-leach -RIL- material as fluid of the slurry flows from outside the screen basket apparatus to inside the screen basket apparatus such that the carbon or resin particles remain on the outside of the screen basket apparatus.