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Figure 7. Odour characterization data of the investigated sources of the WWTP.

Figure 7 Odour characterization data of the investigated sources of the WWTP.

Related Figures (8)

Figure 1. Investigated area and WWTP with principal surrounding sensitive targets (Maps Data: Goggle, ©201' CNES/ Airbus, European Space Imaging, Maxar Technologies).
Figure 1. Investigated area and WWTP with principal surrounding sensitive targets (Maps Data: Goggle, ©201' CNES/ Airbus, European Space Imaging, Maxar Technologies).
Figure 2. Investigated odour sources (Pj, i = 1-7).
Figure 2. Investigated odour sources (Pj, i = 1-7).
Figure 3. Isofrequency levels of odour hours (Maps Data: Goggle, ©2019 CNES/ Airbus, European Space Imaging, Maxar Technologies).
Figure 3. Isofrequency levels of odour hours (Maps Data: Goggle, ©2019 CNES/ Airbus, European Space Imaging, Maxar Technologies).
Figure 4. Frequency (F), duration (D) and offensiveness (O) factors results of the questionnaires survey. Of the 1000 total recorded individual observations, 226 questionnaires (22.6% of the total observations) report not having perceived odours of the wastewater treatment quality or not having perceived odours in the area. Figure 4 summarizes the results of the collected data of the persons that perceived WWTP odours, related to the part of the questionnaire which dealt with the frequency (F), duration (D) and offensiveness (O) of odours.
Figure 4. Frequency (F), duration (D) and offensiveness (O) factors results of the questionnaires survey. Of the 1000 total recorded individual observations, 226 questionnaires (22.6% of the total observations) report not having perceived odours of the wastewater treatment quality or not having perceived odours in the area. Figure 4 summarizes the results of the collected data of the persons that perceived WWTP odours, related to the part of the questionnaire which dealt with the frequency (F), duration (D) and offensiveness (O) of odours.
Figure 5. Relation between the “odour” observations and the distances from the WWTP.
Figure 5. Relation between the “odour” observations and the distances from the WWTP.
Figure 6. Odour nuisance level for each investigated point complete with wind rose (Maps Data: Goggle, ©2019 CNES/ Airbus, European Space Imaging, Maxar Technologies).
Figure 6. Odour nuisance level for each investigated point complete with wind rose (Maps Data: Goggle, ©2019 CNES/ Airbus, European Space Imaging, Maxar Technologies).
Figure 8. Isopleths relevant to the 98th (a) and 85th (b) percentile of the hourly peak concentrations of an odour threshold of 1.0 OUg/ m? and 1.5 OUR/ m? (Maps Data: Goggle, ©2019 CNES/ Airbus, European Space Imaging, Maxar Technologies).
Figure 8. Isopleths relevant to the 98th (a) and 85th (b) percentile of the hourly peak concentrations of an odour threshold of 1.0 OUg/ m? and 1.5 OUR/ m? (Maps Data: Goggle, ©2019 CNES/ Airbus, European Space Imaging, Maxar Technologies).
Figure 9. Comparison of the odour nuisance levels calculated by adopting different approaches: (a) atmospheric dispersion modelling vs. field inspection method using the questionnaire-based survey; (b) atmospheric dispersion modelling vs. field inspection method using the survey based on trained assessors (Maps Data: Goggle, ©2019 CNES/ Airbus, European Space Imaging, Maxar Technologies).
Figure 9. Comparison of the odour nuisance levels calculated by adopting different approaches: (a) atmospheric dispersion modelling vs. field inspection method using the questionnaire-based survey; (b) atmospheric dispersion modelling vs. field inspection method using the survey based on trained assessors (Maps Data: Goggle, ©2019 CNES/ Airbus, European Space Imaging, Maxar Technologies).
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