Odorous emission biofiltration with new synthetic packing materials: essential nutriment release
- Autores: F. Gaudin, Y. Andrès, P. Le Cloirec
- Localización: Biotechniques for air pollution control: proceedings of the international congress Biotechniques for Air Pollution Control : A Coruña, Spain, October 5-7, 2005 / Christian Kennes (dir. congr.), María C. Veiga (dir. congr.), 2005, ISBN 84-9749-163-7, págs. 263-271
- Idioma: inglés
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Resumen
The aim of the present work is to develop original packing materials used as biofiltration support which provides a nutriments release added to the compounds present in the treated gas stream and required for the biological development.
In a first step, UP20 material was formulated and produced by extrusion using calcium carbonate and urea phosphate for providing the mineral element to the micro-organisms and 20 % of an organic binder. Its physical and chemical characterizations show that the organic binding agent gives a significant cohesion capacity to the material even in drastic conditions (submerged in water) and allows a low release of nutrients. In a second step, UP 20 was test to determine its ability to enhance a micro-organisms population growth. For this purpose, Oxitop® tests were performed using activated sludge as biomass, water, sodium sulfide and UP20. The results were compared to those measured with pine bark or pouzzolan packing materials. Some experiments with a mixture of these latter products and UP 20 were also done. It could be deduced from that the addition of UP 20 in a biofilter treating H2S could improve the process performances.
In a third step, a 3 columns pilot-scale biofilter packed respectively with pine bark, UP20 and a mixture of pouzzolan and UP20, was set up to study the effects of these new packing materials under real conditions for H2S emission biofiltration.
