This research explores using recycled by-products from wastewater treatment plants as packing materials in biotrickling filters (BTFs) for odour removal.

   Three materials-commercial Pall rings, recycled plastic bottle caps, and 3D-printed extruded recycled plastic carriers-were tested for treating gases containing H₂S, NH₃, and VOCs. Results showed 100% removal of H₂S and NH₃ at gas residence times up to 6 seconds, and over 90% VOC removal at longer residence times. The 3D-printed recycled plastic carrier achieved the best performance, including complete removal of toluene and α-pinene. The study confirms that recycled plastics from the water cycle can be effective, sustainable packing materials for BTFs in odour treatment..

S. Sáez-Orviz ^a-b, R. Lebrero ^a-b, L. Terrén ^c, S. Doñate ^c, M.D. Esclapez ^c, L. Saúco ^c, R. Muñoz ^a-b*

a Instituto de Procesos Sostenibles (ISP), Universidad de Valladolid, Mergelina s/n, 47011 Valladolid, Spain.
b Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain.
b Depuración de Aguas del Mediterráneo (DAM), Av. Benjamín Franklin, 21, 46980 Paterna, Valencia, Spain.

* raul.munoz.torre@uva.es

   InterCinD, the division of Italian company Lab Service dedicated to Interlaboratory testing, is pleased to announce the organization of its annual Proficiency Test (PT) for Olfactometry, in accordance with the latest EN 13725:2022 standard. All olfactometric laboratories (European or non-European) are invited to participate in this 2025 edition to confirm compliance with the required performance criteria.

   Registration for this year’s Proficiency Test is officially open and will remain available until July 14, 2025. This event stands as one of the most significant Proficiency Testing exercises in Europe focused on odour measurement.