Performance of an internal-loop airlift bioreactor for treatment of hexane-contaminated air
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Hexane is a toxic volatile organic compound that is quite abundant in gas emissions from chemical industries and printing press and painting centers, and it is necessary to treat these airstreams before they discharge into the atmosphere. This article presents a treatment for hexane-contaminated air in steady-state conditions using an internal-loop airlift bioreactor inoculated with a Pseudomonas aeruginosa strain. Bioprocesses were conducted at 20-mL/min, a load of 1.26 g/m3 of C6H14, and a temperature of 28°C. The results of hexane removal efficiencies were presented as a function of the inoculum size (approx 0.07 and 0.2 g/L) and cell reuse. Bioprocess monitoring comprises quantification of the biomass, the surface tension of the medium, and the hexane concentration in the fermentation medium as well as in the inlet and outlet airstreams. The steady-state results suggest that the variation in inoculum size from 0.07 to 0.2 g/L promotes hexane abatement from the influent from 65 to 85%, respectively. Total hydrocarbon removal from the waste gas was achieved during experiments conducted using reused cells at an initial microbial concentration of 0.2 g/L.
Index EntriesAir treatment hydrocarbons hexane biodegradation airlift bioreactor Pseudomonas aeruginosa
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- 1.Ayres, J. G. (1996), Chem. Ind. 21, 827–830.Google Scholar
- 2.Devinny, J. S., Deshusses, M. A., and Webster, T. S. (1999), Biofiltration for Air Pollution Control, Lewis Publishers, Boca Raton, FL.Google Scholar
- 3.Hardman, J. G., Lee, E. L., and Gilman, A. G. (1999), Goodman and Gilman’s the Pharmacological Basis of Therapeutics, McGraw Hill, New York.Google Scholar
- 6.Popov, V. O. and Bezborodov, A. M. (1999), Appl. Biochem. Microbiol. 35(5), 570–577.Google Scholar
- 9.Iida, M., Yamamoto, H., and Sobue, I. (1973), Igaku No Ayumi 84, 199–201.Google Scholar
- 10.Oliveira, F. J. S. and deFrança, F. P (2003), Innovacion. 15(2), 25–31.Google Scholar
- 14.Alexander, M. (1994), Biodegradation and Bioremediation, Academic, New York.Google Scholar