Summary
The odorous substances that are released when producing food are mainly organic materials. Thermal oxidation procedures are uneconomical owing to the relatively low concentrations. However, in an ideal situation, it is possible to adsorb them selectively in specially selected substances.
Within the scope of the preliminary project, a device was developed and constructed at the pilot scale plant. This was designed to minimise emissions of odour intensive substances from industrial sources.
The aim of this sub-project was to install the pilot scale plant directly at industrial emission sources in order to gain experience on its operation and subsequently to optimise the equipment.
Results:
- This was put into practice in a factory dealing with oil and fat processing. The separation efficiency of the pilot scale plant and the adsorption capacity of the ZEOCAT Z 700 adsorbent were unsatisfactory. Additional tests showed the suitability of the HBEA-25 adsorbent.
- Basically, it is imperative to pay more attention to the selection of a suitable adsorbent for the respective application. Therefore, a relatively small portable test device was constructed with which four samples of about one litre could be used at the same time to test the suitability for the respective application. Breakout curves on the samples are recorded for the hydrocarbon in the waste gas with a flame-ionisation detector. As a rule, this also provides a meaningful statement on odour minimisation
