17th meeting on the Standard on Instrumental Odour Monitoring Systems took place last week

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Bland Alman Plot2
   Last Monday took place the 17th meeting of Working Group 41 (WG41) that is dealing on the new standard for Instrumental Odour Monitoring Systems (IOMS). This meeting was focusing on the statistics behind the Quality Assurance Level 1 (QAL1) of IOMSs. There are some aspects that make IOMS special as compared to other Automatic Measuring Systems (AMS) and one of these aspects is the cost of comparing the electronic signal of the IOMS with that of the reference method EN 13725.

   One of the key issues addressed many times during the WG41 meetings is that of the number of samples that should be taken in order to make QAL1 checks viable for IOMS manufacturers. Dynamic Olfactometry comes at a cost and odour is not a substance, it is a class. The question is: how many samples should be taken in order to have a representative picture of the IOMS performance?

Odor management of the El Rutal Biosolids Management Center

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P17IP    The odor management associated with the operation of the El Rutal Biosolids Management Center has been carried out through different evaluation mechanisms such as: modeling of dispersion of gases and odors before and during the operation of the Center, continuous monitoring of odors, participation of the residents in the city center of Montenegro and Rungue.

   The continuous analysis of the results delivered by the previously described mechanisms plus the consideration of atmospheric stability indicators (air quality and ventilation factor). allowed to determine episodes in which meteorological factors conditioned rises in the perception of odor concluding in the evaluation and modification of operational slogans in order to minimize the emission of odors.

F. Chávez, J. Garcés, A. Araya, P. Sanchez

Aguas Andinas S.A., área de Medio Ambiente y Biodiversidad, Santiago, Chile.


Diagnosis and management of odours generated from the chamber of mixing and distribution of wastewater - CAM04

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P17IP    Approximately 50% of the wastewater from the "big Santiago" (Santiago Metropolitan Region, Chile) converges into the Chamber of Mixing and Distribution of Wastewater - CAM04 to be later conducted towards the Mapocho Trebal Sewage Treatment Plant.

   Due to the considerable amount of the wastewater flow that converges into this chamber, a diagnosis of the odours generated from the CAM04 was carried out, which was based on a field sensory monitoring in the nearby inhabited areas, as well as a dynamic olfactometry campaign and odour dispersion modeling in order to determine the influenced area associated at this source.

F. Chávez, J. Garcés

Aguas Andinas S.A., área de Medio Ambiente y Biodiversidad, Santiago, Chile.


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