1,721,164 research outputs found
Tecniche di caratterizzazione e misura degli odori: esempi applicati agli impianti di depurazione
No full textCombination of field inspection and dispersion modelling to estimate odour emissions from an Italian landfill
Full text linkIn the case of landfills, the determination of odour emissions is particularly complex. Up to now, no universally accepted methodology for sampling and assessing emissions from landfill surfaces has been established. Besides, the dependence of such emissions from some crucial environmental variables, such as wind speed, has not been univocally defined yet. In this study, odour dispersion modelling and plume inspections by human assessors were combined in order to estimate the odour emissions from a landfill in Southern Italy. Two substantially different approaches were compared: the one that considers emissions as a function of the wind speed blowing over the surface, counterposed to the one that considers odour emissions as constant, in agreement with the most recent studies on the matter. The comparison of the field assessments and the model clearly highlights that the first approach significantly overestimates the landfill odour emissions, whereas the use of a constant odour emission rate results in a much better correspondence between model outputs and field assessments, both in terms of shape and extension of the determined odour plume extents
Naso elettronico: valutazione delle emissioni di odore da discariche e impianti di compostaggio
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Oggettivazione del disturbo olfattivo e validazione del modello di dispersione degli odori mediante l'elaborazione dei dati relativi agli episodi di rilevazione di odori da parte della popolazione
No full textNasi elettronici per la determinazione di impatto olfattivo: l'impianto di compostaggio di Rimini
No full textStudio previsionale di impatto olfattivo mediante simulazione della dispersione atmosferica: caso di studio con riferimento alla Linea Guida di Regione Lombardia
No full textMonitoring odour emisssions from an oil & gas plant: Electronic nose performance testing in the field
Full text linkThis paper focuses on performance testing of electronic noses for environmental odour monitoring in terms of their capability of correctly classifying odours at low odour concentrations. The studied case concerns the realization of an electronic nose network for the continuous monitoring of odour emissions from a crude oil extraction and separation plant. The novelty of the work consists in the fact that performance testing, which is typically carried out in laboratory before installation in the field for environmental odour monitoring outside the plant boundaries, in this case was carried out after installation with the aim of testing the instruments performances in the effective working conditions. This involved the necessity to develop a specific and repeatable procedure to obtain samples at known quality and concentration in the field. Electronic nose performance was evaluated in terms of classification accuracy, which produced satisfactory results towards the considered olfactory classes
Discussione dei limiti di accettabilità di impatto olfattivo in immissione basata su casi reali
No full textContinuous monitoring of odours at a biofilter outlet
Full text link[Abstract] The experience matured in the field of biofiltration applied to odour removal enabled to study the correlation between some of the characteristic parameters of the biofilter bed (e.g. T, RH, ?P) with the emitted odour concentration. Today odour measurement can be performed only by classical olfactometry. Classical olfactometry is an expensive and time-consuming method that is not suitable for continuous monitoring as needed by operators of compost facilities. This paper describes the experimental approaches adopted for the development of a system for the continuous monitoring of odour emissions, i.e. an instrument for the repeated air analysis, capable of qualitatively and quantitatively recognizing odours. This work shows the results of the first experiments carried out with the purpose of developing an electronic nose to be applied at a biofilter outlet for the real-time odour concentration measurement and for the detection of the exceeding of a given odour «alarm threshold»
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