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The guidelines for the analysis and definition of the technical and management criteria for the mitigation of emissions refer to the provisions of the Province of Trento, whose determinations were also taken as a reference by ARPAE of Emilia Romagna which, in May 2018, with executive resolution, it identified target values similar to those indicated by the Province of Trento in terms of odor impact. The environmental impact assessment was carried out on the basis of these provisions.
In terms of incidence on vehicular traffic, an average traffic of around 120 heavy vehicles per day was calculated, of which:
FORSU input - about 71 vehicles/day (62 of which already exist for the collection of OFMSW in the province) of which only 9 vehicles/day from outside the province.
Green entrance - about 35 vehicles/day (already existing for the collection of greenery in the provincial territory)
Compost output - about 7 means/g
Waste and CO2 output - about 4 vehicles/g
The average increase in traffic is very limited, and is around 3-4% of current traffic during peak hours (2,289 current vehicles - 2016 data). At the provincial area level, there will be an increase of only 20 vehicles/day compared to the current situation.
For several years, the company Iren Ambiente has been scientifically collaborating with the Milan Polytechnic on the development of cutting-edge solutions for monitoring and controlling odorous emissions.
As regards the anaerobic digestion plant of the organic fraction of waste with subsequent refining of biogas to biomethane in Reggio Emilia, loc. Gavassa, the research group led by Prof. Laura Capelli of the "Giulio Natta" Department of Chemistry, Materials and Chemical Engineering of the Milan Polytechnic, which has been involved in the development of sensor technologies for odor monitoring for 20 years, has proposed the creation of an innovative system for continuous monitoring of the plant's odorous emissions through a sophisticated electronic olfactory system called the "electronic nose". When fully operational, this system will have to continuously analyze the ambient air at the boundary of the plant, and detect the presence of any "anomalies" associated with possible odorous peaks, which could cause the perception of odors outside the plant, in order to allow the plant managers to intervene immediately and therefore limit the duration of the odorous phenomenon, avoiding the creation of situations of olfactory nuisance for the population residing near the plant.
Following a first phase of work, which involved carrying out a parametric modeling study aimed at identifying the optimal point at the plant boundary for the installation of the electronic nose, capable of monitoring odorous emissions and detecting potential events smells before they impact on the receptors closest to the plant, on 21 October 2022 the electronic nose was installed on the south-west border of the plant, in the direction of the town of Gavassa.
Currently, the electronic nose is already analyzing the air continuously, even if the training of the instrument to recognize the characteristic odors of the system and any odorous peaks can only be completed after the system has been put into full operation. The guidelines for the characterisation, analysis and definition of the technical and management criteria for the mitigation of emissions refer to the provisions of the Province of Trento, whose determinations were also taken as a reference by ARPAE of Emilia Romagna which, in May 2018, with executive resolution, it identified target values similar to those indicated by the Province of Trento in terms of odor impact. The environmental impact assessment was carried out on the basis of these provisions.
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