The number of methanisation production sites increase in Europe. However, the installation of a new sitesometimes creates problems with the neighborhood of the sites. The main concern is odours. To respond tothese fears, the odour levels emitted by 3 biogas production plants were measured. In order to study themethanisation diversity, different waste treatment plants have been monitored. The waste came from farming(manure, slurry), WWTP sludge, or agro-food were compared. For each plant, 5 sources were investigated. Aone year survey indicates that odour emissions changed according to the season. For each site, the mainpotential odour annoyance impact comes from the input preparation area.
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