Propene removal from synthetic waste gas using a hollow-fibre membrane bioreactor |
| |
Authors: | M W Reij S Hartmans |
| |
Institution: | (1) Division of Industrial Microbiology, Department of Food Science, Wageningen Agricultural University, PO Box 8129, 6700 EV Wageningen, The Netherlands. Fax: +31 317 484978, NL |
| |
Abstract: | Hollow-fibre modules containing microporous membrane material were evaluated as bioreactors for waste gas treatment. The
reactors were inoculated with the propene-utilizing strain Xanthobacter Py2, which formed a biofilm on the inner side of the fibres. The removal of the poorly soluble volatile propene from synthetic
waste gas was monitored for up to 170 days. The maximum removal rates were 70–110 g propene per m3 reactor per hour. A gas residence time of 80 s was required to remove 95% of an initial propene concentration of 0.84 g/m3. The presence of ammonium in the liquid medium resulted in the development of an additional population of nitrifying organisms.
Therefore, nitrate was used as the source of nitrogen in later experiments. During long-term operation, the propene removal
rates gradually decreased. At low liquid velocities (1–5 cm/s) clogging of individual fibres with excess biomass was observed.
Elevation of the liquid velocity in the fibres to 90 cm/s resulted in the formation of a dense biofilm and prevented clogging
of the fibres. However, also at this high liquid velocity a gradual decrease in propene removal rate was observed. These results
suggest that aging of biofilms is a very important factor in long-term operation of hollow-fibre bioreactors.
Received: 24 November 1995 / Received revision: 14 February 1996 / Accepted: 20 February 1996 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|