Author(s)

J. M. Guillot, J. L. Fanlo, C. Leyris, F. Maupetit & L. Pourtier

Abstract

Flux chamber development as a tool to measure odorous emissions from area sources J.M. Guillot1, J.L. Fanlo1, C. Leyris2, F. Maupetit3, L. Pourtier4 1 Ecole des Mines d 'AI&, LGEI, Alb, France 2 Burgeap, Avignon, France 3 CSTB, Marne-la- Valede, France 4 E.O. G., Aix-en-Provence, France Abstract This study shows the development of a wind tunnel to create odorous emissions from area sources and a new dynamic flux chamber (1.2 m long, 0.15 m large and 0.18 m height) to sample the emitted odour. Diethyl sulphide is chosen as odorous compound model and added in a water tank placed in the wind tunnel. On this odorous surface, several wind velocities are tested and ventilation rate into the flux chamber is variable too. Atmospheric samplings are carried out into the tunnel and into the flux chamber that is put on the surface. Physico-chemical and olfactometric results between inside and outside the flux chamber are compared. The use of the dynamic chamber shows that liquid physico-chemical measurements are obtained with acceptable precision and accuracy (RSD and averaged bias are less than 10%). Such a flux chamber can be used to sample gaseous emissions on liquid surface. No-significant influence of operating parameters on precision and accuracy is shown when emission rates are up to 50 mg.m-2.min-1. A small negative bias is observed on uncovered surface emission rates (water tank surface not covered by the flux chamber) compared with total surface emission without the flux chamber (all the water tank surface). This little variation is explained by the fact that the flux chamber covers roughly a quarter of the total surface of the tank. 1 Introduction Industrial odours often lead to annoyance and their physico-chemical and sensorial measurements imply sampling procedures. If these procedures are well

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