IOMS for the real-time monitoring of odour concentration at a MSW landfill

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 PCA score plot relevant to IOMS training for the landfill monitoring  Instrumental Odour Monitoring Systems (IOMS) represent the only tool available for environmental monitoring capable to perform real-time characterization of ambient air. They have been commonly used to assess odour impact at receptors thanks to their capability to detect odours and identify their provenance. An emerging application of IOMS concerns the real-time monitoring of emissions at plant fencelines. To do this, IOMS must provide a fast and accurate measurement of the odour concentration.

   The most common approach, currently applied for odour quantification models, involves simplified regression algorithms, neglecting the classification of detected odours before quantification. This results in poorly accurate estimations of the odour concentration since IOMS responses to samples having the same odour concentration, but representative of different sources, may differ significantly.

The long and winding road of CEN/TC264/WG41 developing a standard for validating Instrumental Odour Measurement Systems

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Ton WG41  In May 2015 the decision was made, by a positive vote in Technical Committee 264 ‘Air Quality” of the Committee Européen de Normalisation (CEN), to establish a preliminary work item “Air quality – Continuous instrumental odorant monitoring in air to assess risks of odour (nuisance) and safety” which was entrusted to working group WG41 "Electronic sensors for odorant monitoring" for a period of 6 years starting on 2015-05-12. The Dutch member of CEN, NEN, was assigned the secretariat and the author of this article was appointed as convenor.

  The first meeting of WG41 was held on the 22nd of October 2015 in Antwerp. After 20 meetings over 6 years, we have come to the end of the time assigned without presenting a final draft standard for voting to the TC 264 “Air Quality.

Field test evaluation of instrumental odour monitoring systems with a novel in-situ calibration approach

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   Instrumental Odour Monitoring Systems (IOMS) are employed for continuous objectified technical olfaction. However, the reference for odour perception is the human nose, surpassing technology with outstanding sensitivity and selectivity for many compounds. In order to achieve comparable results, IOMS have to fulfil manifold requirements, resulting in considerable effort in engineering and cost. One-size-fits-all solutions are unlikely to function properly but are nevertheless marketed as the resulting performance is difficult to assess.

   In the course of the publicly funded research project SEPEG (sensor networks for the objective perception of odour sources, BMBF FKZ 01IS17087) all aspects of a complete IOMS solution are scrutinized in their respective context. A main focus of the project is on field test evaluation in real installation situations. Two installation sites have been equipped with networks of real-time IOMS devices.

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