Biological treatment of contaminated air with toluene in an airlift reactor
Electronic Journal of Biotechnology
Abbreviations: EC: elimination capacity RE: removal efficiency TL: toluene load VOC: volatile organic compounds VIC: volatile inorganic compounds In this work the variation in the toluene elimination capacity of an airlift bioreactor as a function of the toluene inlet load, using compost as the support material for the microorganisms was studied. In order to evaluate the flexibility of the reactor under changing toluene load, the toluene biodegradation was measured for flows from 2.4 x 10 -2 to
... from 2.4 x 10 -2 to 0.132 m 3 h -1 , and a concentration range from 1.4 to 0.8 g m -3 . Results show a 100% removal efficiency (RE) for minor flows, however, for a flow increase of 450% the RE decreased 40%, reflecting the equipments weak flexibility in *Corresponding author varying flows. Meanwhile the maximum elimination capacity obtained was 230 g m -3 h -1 , for toluene loads of 550 g m -3 h -1 , corresponding to a flow of 0.132 m 3 h -1 . It was found that a average biomass concentration in suspension of 3700 g m -3 , reflected EC's of 203 g m -3 h -1 . Volatile organic compounds (VOC'S) are some of the main atmospheric emissions along with particle matter. The most common VOC'S are alcohols, ketones, aliphatic hydrocarbons and aromatic hydrocarbons BTEX (benzene, toluene, ethylbenzene and xylene isomers) being generated Note: Electronic Journal of Biotechnology is not responsible if on-line references cited on manuscripts are not available any more after the date of publication.