Selective shredding, sieving, and/or separating device connected to a hygienic production or operating in an off-line location

A multistage shredding and sieving system comprising an apparatus for shredding hygiene products, said hygiene products comprising plastic, pulp and superabsorbent polymer (SAP), wherein said apparatus comprises more than one revolving device, and two or more opposing rotating shafts, wherein 1 to 100,000 fingers are attached to the said two or more opposing rotating shafts that rotate at equal or differential speeds, wherein the fingers are configured to damage the hygiene products without using a shear cut or crimp cut process, wherein each of said revolving devices forms a stage of said multistage system, and each of said revolving devices has a structure comprising a plurality of apertures, wherein a diameter of each aperture ranges from 1 to 1,000,000,000 microns, and said apertures being configured in size and shape to allow pieces or components or sub-assemblies of said hygiene products to pass through said apertures, wherein the diameter of apertures of a revolving device is progressively reduced within subsequent stages of the system, thereby separating pulled and/or torn apart plastic, pulp and SAP components of said hygiene products.