New Beta version 20.1 of GRAL model

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gram gral website picture   The Graz Lagrangian (GRAL) system is a closed-source Lagrangian particle model with a free Graphic User Interface (GUI) available in both Linux and Windows. This model has a special module focused on odour dispersion modelling and now, a new beta release has been distributed in the mail list of users, with an extensive list of changes.

   People interested in testing and trying this new beta, should subscribe to the official website of the project here. The current version 19.1 has been updated to the version 20.1. According to the release notes, this is the third beta of this version. There is no information on when the final version will be released.

New guideline on assessment of odour exposure by using dispersion modelling is looking for volunteers and contributors.

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odour dispersion guideline   A new development on the first worldwide guideline on the assessment of odour exposure by using dispersion modelling will take its first steps. At this stage, there are many initiatives related to dispersion modelling worldwide but there is no specific guideline for odour modelling to our knowledge. This is an initiative promoted by several experts in the area of modelling that will be led by Mr. Günther Schauberger and Ms. Jennifer Barclay. First meeting will take place the 27th of August.

  Modelling odours is complex and many of the guidelines on modelling published around the world fall short in treating this vector. Modelling odours often requires to forget about traditional dispersion modelling operating modes and to focus on exposure. Odours are perceived in seconds or minutes, not hours and this is key in calculating its impact on ambient air. Most odour incidents are generated during calm or very low wind speeds which do not facilitate the dispersion of an odour and that makes modelling challenging. Last, but not least, there is a need to investigate the role of Instrumental Odour Monitoring Systems (IOMS) on the evaluation of model performance.

Odorants Atmospheric Dispersion Forecast around a Pulp Mill Plant

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sesion04 cartelle04   Traditionally, pulp mill plants using Kraft process produce TRS (Total Reduced Sulphur) odorants emissions; this is the case of ENCE-Pontevedra plant.

   In this work, PrOlor operational system for odorants atmospheric dispersion forecast is presented, based in WRF/CALMET/CALPUFF models, and applied to prevent sporadic odor episodes around that plant.

D. Cartelle 1*, J.M. Vellón 1, A. Rodríguez 1,2, D. Valiño 1,2, J.A. González 2, M. Bao 2 and C. Casas 3

1. Troposfera Soluciones Sostenibles, c/ Real, 127, 15401 Ferrol, A Coruña, España.
2. Departamento de Ingeniería Química, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, España.
3. ENCE-Pontevedra, Avda. de Marín, Pontevedra, España


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