The odor emissions of a coffee processing company were reduced applying a fixed bed adsorber pilot plant. In order to evaluate the performance, breakthrough curves were determined using a flame ionization detector, portable electronic noses, olfactometry and analytical methods. The analytic identification of odorants and pollutants was carried out via enrichment on Tenax TA and on SPME fibers. Several odorants were identified, which determine the overall olfactory sensation. Furthermore the breakthrough behavior of different adsorbents was characterized. The olfactometric concept was applied first-time for the electronic noses.