In this sewage plant under consideration, the wastewater is moved vertically using eight Archimedes screw pumps. During the process of moving the wastewater upward, there is an emission of H₂S from the surfaces of the Archimedes pumps. Traces of H₂S have been detected inside of the building that houses the pump engines.

   The present paper evaluates a modification in the HVAC system of the building to mitigate the presence of H₂S inside the building.

P. A. Tarela¹ and F. E. Camelli²

1. CCyA Ingeniería, Buenos Aires, Argentina. ptarela@ccyaingenieria.com.ar
2. Laboratory for Computational Fluid Dynamics, Department of Physics and Astronomy, George Mason University, Fairfax, Virginia, USA.

   The current problems in relation to odor pollution episodes make it necessary to have methods to assess odor impacts. Such assessment can be performed using dispersion models that allow to estimate odor concentrations considering the emissions, the meteorology and the topography, among other data.

   Pollutant dispersion modeling is usually based on minimum averaging times of one hour; however, some pollutants require shorter averaging times, as it is the case of odors. Recently, the Atmospheric Research Group of the Faculty of Engineering of Bilbao has set up a methodology to perform dispersion studies using sub-hourly temporal resolution.

P. Uriarte*, V. Valdenebro, E. Sáez de Cámara, G. Gangoiti and M. Navazo.

Universidad del País Vasco / Euskal Herriko Unibertsitatea (UPV/EHU), Escuela Técnica Superior de Ingeniería de Bilbao, Alameda Urquijo s/n, 48013 Bilbao.
*puriarte002@ikasle.ehu.eus