Influence of nematodes grazing bacteria on biomass growth in a biotrickling filter treating chlorobenzenes
- Autores: Chantal Seignez, C. Holliger
- 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. 361-367
- Idioma: inglés
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Resumen
Biotrickling filters can be applied for the treatment of volatile organic compounds in contaminated air streams but the clogging of high-performance biotrickling filters limit their implementation in industry. This work was aimed to evaluate the influence of nematodes on biomass accumulation and the performance of a biotrickling filter treating chlorobenzene-containing waste gas.
Microscopical investigations of microbial community growing on packing material of a 40-L laboratory biotrickling filter showed that up to a mass loading rate of 4.55 kg m-3 d-1, there was a large diversity of organisms. When a nematode inhibitor, ivermectin, was added to the trickling liquid at a concentration of 0.2 mg l-1, the removal efficiencies were maintained at 85-90 % whereas the biomass accumulation rate increased from 0.010 to 0.019 kg m-2 d-1, two days after adding the inhibitor. This result indicated that nematodes were effectively reducing the biomass accumulation rate and the application of organic solvent-resistant nematodes can therefore be an efficient mean to reduce the frequency of backwashing.
