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 As many of you already know, the EN 13725 was published in February 2022. There are many new provisions in the new text that needs to be reviewed in detail, but maybe one of the most impacting in the day-to-day operations of the over 400 laboratories around the world is the one of the minimal recovery rate accepted for olfactometers.
With the new standard in hand, no olfactometer can be used for odour measurement under the EN 13725 accreditation scheme, unless recovery rates of 70 % or higher has been tested for four test gases: hydrogen sulphide, n-butanol, propanoic acid and dimethyl sulphide. That means that any olfactometer in the world needs to pass this test if an accreditation is needed. And this is no cheap test.
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Today , the over 50 volunteers that are working on the first International Handbook on the Assessment of Odour Exposure by using Dispersion Modelling reached their first milestone. The first draft of this handbook, was just released (only available for the volunteers) and it has, at this stage, 289 pages of information on the topic.
The group has had already 20 monthly meetings since the very first meeting took place the 27th of August 2020. This development is being led by Ms. Jennifer Barclay, principal scientist of Atmospheric Science Global (ASG) in New Zealand and Dr. Günther Schauberger, professor of the University of Veterinary Medicine of Vienna, Austria.
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 The European Standard EN 17628 just published now defines not only one method, but five different methodologies to carry out the evaluation of fugitive and diffuse emissions of Volatile Organic Compounds (VOCs). Isn't that wonderful? Well, hold your horses, because they ain't easy methods!
The EN 17628 deals with Fugitive and diffuse emissions of common concern to industry sectors. This standard defines a series of methodologies to determine diffuse emissions of VOCs into the atmosphere from industrial sources. These methods are Optical Gas Imaging (OGI), Differential Absorption Lidar (DIAL), Solar Occultation Flux (SOF), Tracer Correlation (TC), and Reverse Dispersion Modelling (RDM).
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 The International Symposium on Olfaction and Electronic Nose (ISOEN) took place as planned in Aveiro, Portugal at the end of May 2022. Despite its title, ISOEN conferences have sessions not only with electronic noses but with a much broader set of devices that have in common the aim to detect things electronically such as electronic tongues, sensors for non-odorants, air quality, health, etc.
The conference was structured in several sessions to try to fit the over 100 papers received in this occasion. This was the first conference hold face-to-face in a long time after an online break during the pandemia.
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As you probably know, Olores.org organized the 9th IWA Odour & VOC/Air Emission Conference will take place the 26-27 of October 2021 in Bilbao, Spain. The IWA Odour and Air Emissions Conferences is one of the worldwide leading odour conferences. These events bring together engineers, scientists, researchers, students, local authorities, managers and other professionals in order to address and discuss emerging odour issues.
More than 160 people attended that event, from 19 different countries, and more than 50 presentations were shown there. Although this conference was held primarily in English, some of them are in Spanish, but you could read their abstract in English..
Saying that, we are very happy to share with you the articles of their presentations, and the videos and PPT files of the ones that have given us their authorization to publish them.
Enjoy the reading!
 Biofiltration is not a one-size-fits-all technology. In order to properly design the biological odour control process, the foul air source needs to be accurately characterized. The optimal biological odour control configuration will depend strongly on the compounds contributing to odour. Considering the application of biological odour control to wastewater treatment plants specifically, this paper first describes the most common odorous compounds and how each can be biologically degraded.
Several case studies demonstrate the importance of selecting the proper biological technology based on the foul air source. This paper is intended as a Manual of Best Practices for environmental professionals interested in applying the latest developments in advanced biological odour control techniques.
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 An Odour Attribution Study is undertaken in North America for an Air Quality Management Agency that includes athering data from specific sources and ambient locations to better understand odour impacts within the local communities. Specifically, the following objectives were to be met:
Identify odorant compounds impacting the area of concern via comprehensive quantitative and qualitative analyses; Determine the relative contribution and variability of the odorant compounds emitted from the three key source facilities; Develop a strategy for continuous real-time odorant monitoring to measure emissions impacting the community from the three key source facilities.
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 An Energy Development Facility (EDF) has been evaluated as an odor source to optimize the evaluation of odor persistency. The objectives were to identify the odor characteristics and intensity from the EDF and to determine the relative contribution and variability of the different odors emitted.
The method includes using the Odor Profile Method to identify each odor character and intensity and using olfactometry as an odor dilution system to determine the persistency of the odor, i.e., the rate of decrease of an odor with dilution. The results showed that air coming from the EDF can pose a rancid and sweet odor nuisance for the community near the EDF and possibly a weak musty odor nuisance for the area further away from the EDF.
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