Abstract:
:Stricter regulations on volatile organic compounds and hazardous air pollutants have increased the demand for abatement technologies. Biofiltration, a process in which contaminated air is passed through a biologically active bed, can be used to remove these pollutants from air streams. In this study, a fungal vapor-phase bioreactor containing a strain of the dimorphic black yeast, Exophiala lecanii-corni, was used to treat a gas stream contaminated with toluene. The maximum toluene elimination capacity in short-term tests was 270 g m(-3) h(-1), which is 2 to 7 times greater than the toluene elimination capacities typically reported for bacterial systems. The fungal bioreactor also maintained toluene removal efficiencies of greater than 95% throughout the 175-day study. Harsh operating conditions such as low moisture content, acidic biofilms, and nitrogen limitation did not adversely affect performance. The fungal bioreactor also rapidly reestablished high toluene removal efficiencies after an 8-day shutdown period. These results indicate that fungal bioreactors may be an effective alternative to conventional abatement technologies for treating high concentrations of pollutants in waste gas streams.
journal_name
Biotechnol Bioengjournal_title
Biotechnology and bioengineeringauthors
Woertz JR,Kinney KA,McIntosh ND,Szaniszlo PJdoi
10.1002/bit.10066subject
Has Abstractpub_date
2001-12-05 00:00:00pages
550-8issue
5eissn
0006-3592issn
1097-0290pii
10.1002/bit.10066journal_volume
75pub_type
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