1 CHEMICAL PRODUCTS FOR INDUSTRIAL PURPOSE, NAMELY, FOR SUBSTRATES IMMOBILIZING BIOLOGICALLY ACTIVE COMPOUNDS, USED IN THE MANUFACTURE OF ALTERED PLASTIC MATERIALS, IN THE FOOD PROCESSING, PHARMACEUTICAL, BIOLOGICAL, SEWAGE AND WASTE WATER PROCESSING, AND ENVIRONMENTAL FIELDS; FILTRATION MATERIAL, NAMELY, POWDERS AND GRANULATED SUBSTANCES, SOLID SUBSTANCES WITH PERFORATION, SINTERED SUBSTANCES WHICH ARE POROUS AND BASED ON CHEMICAL, MINERAL OR VEGETABLE MATERIAL, RAW MATERIAL OR CERAMIC PARTICLES USED IN THE FOOD PROCESSING, PHARMACEUTICAL, BIOLOGICAL, SEWAGE AND WASTE WATER PROCESSING, AND ENVIRONMENTAL FIELDS