Application and design considerations for media packaging and lamella in water and wastewater treatment professional workshop by the Italian company Refill-Tech and in collaboration with the Spinas engineering group, with the presentation of Mr.Mark Izard and Mr.Gabriele Caccia was hold on Tuesday, February 3, at the site of the Society of Specialized Consulting Water and Wastewater Custodial Engineers and Consultants with an Introduction to packing media application, bioxidation and MBBR media, lamella applications in settling systems and conditions for packing and maintenance of lamella, and for second time it was hold on Wednesday, February 4, at the Research Center of Oil Industry with the concentration of packing media and lamella applications on cooling tower sections and related equipment in the Refining and petrochemical industries of Iran.