Source identification of odours and VOCs from a composting plant by multivariate analysis of trace volatile organic compounds

The analytical difficulties in odour measurements are related to the well known complecity of out olfactory sensory perception. Still the importance of such an analysis in environmental pollution is, in a lack in the actual legislation in specific odour control procedure and this paper discusses about the possibility of using instrumental analysis, in conjunction with sensorial analysis, to characterize odour emissions in order to detect malfunctions in the facilities and to prevent air pollution and olfactive nuisance in the environment. We present here result from a study, performed during environmental odour episodes, in the area surrounding a composting plant and a MSW landfill. Odour episodes were perceivedx as far as 3 km downwind, where ambient air has been samples. Results seem to suggest that the main odour sources, responsible ofr this episode, were related to the bio-oxidation building area. The pattern of organic compounds emitted from the odour abatement systems and from the close-bu landfill appears statistcally different from ambient air samples and were well separated by statistical multivariate analysis.