The quality and technical development of an olfactometry laboratory is not free of setbacks and deviations, which are often ignored or even unknown. These can be found in every step of the laboratory procedure, selection and calibration of panelists, sampling, olfactometry analysis and results.

   After twenty years of experience and being participating in a proficiency test since 2010, the factors that may influence in our successful performance were analyzed. The results of this analysis lead to a general review of the other activities and processes of the laboratory.

I. Muñoz*, V. Zorich

Envirometrika - Santiago, Chile

*imunoz@envirometrika.com

   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

*jb@alphachem.es