Deodorization of Waste Water Treatment Plants is becoming an increasingly important need to avoid conflicts with the neighboring environment. The primary and secondary clarifiers, due to their dimensions and concentrations of stinging gases, are units that, so far, have been quite abandoned, concerning deodorization.

   The traditional solution is based on total coverage and deodorization of the indoor faul air, with a number of air renovations per hour between 3 to 8, depending on designs. This solution is expensive, both in terms of investment and maintenance. In the present article an alternative is shown, covering exclusively the channels of the clarifiers and deodorizing them with small units of chemical adsorption, obtaining an efficiency of approximately 90% with respect to the open decanter.

J. Balfagón*, J.L. Recaj

Alphachem S.L., Spain

*

   Indoor air pollution is one of the biggest concerns in terms of public health. In France, it was estimated that indoor air pollution would bring about a socio-economic cost of around 20 billion euros per year. In this context, the treatment of this kind of pollution has become an important challenge.

   The CUBAIR project aimed to develop and evaluate an original prototype, combining air purification techniques such as adsorption, filtration and photocatalysis. The evaluation of the performance of this prototype was carried out in situ during 10 months and different measurements were taken for parameters and pollutants such as nitrogen oxides and VOCs with emphasis on BTEX and some aldehydes. Other measurement campaigns were carried out to determine particle concentrations (PM₁, PM_2.5, PM₁₀), microbiological parameters, comfort parameters (temperature, relative humidity), as well as the air flow of the prototype. The results show a good removal efficiency (RE) of nitrogen oxides with a RE of 86% for the NO₂. Likewise, PM₁ was reduced by more than 75%.

C. Hort¹, E. Hallemans², G. Coulbaux², M. Binet³, V. Platel¹, L. Moynault¹, V. Héquet⁴, Y. Andres⁴, A. T. Luengas¹, S. Lerey², C. Neaud²

¹ Univ Pau & Pays Adour / E2S UPPA, Laboratoire de Thermique, Énergétique et Procédés (LaTEP), IPRA, EA1932, 64000 Pau, France.
² Cerema Ile-de-France –12 rue Teisserenc de Bort, 78190 Trappes-en-Yvelines, France
³ Société Air Sûr Paris Région Innovation Nord Express – 46 rue René Clair, 75018 Paris, France.
⁴ IMT Atlantique, DSEE, GEPEA UMR CNRS 6144 – 4 Rue Alfred Kastler, 44300 Nantes, France.