Odour measurements

BioDrain® Sp. z o.o. specialises in providing measuring services and designing for industrial customers with regard to odour concentration assays with the dynamic olfactometry method based on the PN-EN 13725 standard.
We are accredited to make olfactometric sample taking and assays (odour measuring), as well as to identify emissions of accompanying compounds, including H2S, NH3.

The accredited odour measurements (olfactometry) comprise:

1. Survey of malodorous substances emission sources
2. Taking air samples
3. Comprehensive assays of odours concentration
4. Determination of the intensity and hedonic quality of an odour
5. Preparing final reports

The accredited odour concentration measurements are made in accordance with the PN-EN 13725 standard entitled “Air quality – Determination of odour concentration by dynamic olfactometry”, with the use of TO8 olfactometer.
The tests are made by:

1. dynamic dilution method, with regard to the technique of diluting the sample of the tested gas,
2. “Yes-No” method, with regard to the method of collection of evaluative opinions

Dynamic dilution consists in mixing the stream of the tested gas with the stream of clean air. The mixture prepared in the olfactometer as a stream of variable dilution is subject to assessment by the test participants. Their task is to determine the moment in which they feel the presence of the odour. This means that not the opinions of the participants on the sample of polluted gas are gathered but the information on the sensitivity of their sense of smell.

The device enabling the measurement is TO8 OLFACTOMETER. Concentration of odorous substances in the tested sample is expressed as the multiple of one unit, and the odour as the dilution ratio needed to reach the odour detection threshold. The method was described in detail in the EN 13725 European Standard, which has been further translated and recreated as the PN-EN 13725 standard.

The olfactometry services offered by BioDrain are supplemented with:

1. odour propagation modelling,
2. sale of software for processing odour data with statistical methods,
3. professional advising in selection of the proper deodorisation technologies.

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