Denitrification and nitric oxide reduction in an aerobic toluene-treating biofilter
- Univ. of California, Davis, CA (United States)
The presence of significant denitrification activity in an aerobic toluene-treating biofilter was demonstrated under batch and flow-through conditions. N{sub 2}O concentrations of 9.2 ppm{sub v} were produced by denitrifying bacteria in the presence of 15% acetylene, in a flow-through system with a bulk gas phase O{sub 2} concentration of >17%. The carbon source for denitrification was not toluene but a byproduct or metabolite of toluene catabolism. Denitrification conditions were successfully used for the reduction of 60 ppm{sub v} nitric oxide to 15 ppm{sub v} at a flow rate of 3 L/min (EBRT of 3 min) in a fully aerated, 17%/v/v O{sub 2} (superficially aerobic) biofilter. Higher NO removal efficiency (97%) was obtained by increasing the toluene supply to the biofilter.
- Sponsoring Organization:
- National Inst. of Environmental Health Sciences, Research Triangle Park, NC (United States)
- OSTI ID:
- 619425
- Journal Information:
- Biotechnology and Bioengineering, Vol. 58, Issue 4; Other Information: PBD: 20 May 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Oxygen Effects on Thermophilic Microbial Populations in Biofilters Treating Nitric Oxide Containing Off-Gas Streams
Direct measurement of denitrification loss from soils. I. Laboratory evaluation of acetylene inhibition of nitrous oxide reduction