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# Removal of dimethylsulfide, n-hexane and toluene from waste air in a flat membrane bioreactor under continuous conditions

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Abstract
Dimethylsulfide (DMS), n-hexane and toluene removal from a waste air was carried out by using a flat composite membrane bioreactor under continuous feeding conditions. The composite membrane consisted of a dense polydimethylsiloxane top layer with an average thickness of 1.5 μm supported with a porous polyacrylonitrile layer of 50 μm. The membrane bioreactor (MBR) was operated during 9 months in which several operational conditions were applied. The inlet load of each compound ranged from 0 to 350 g m-3 h-1 and removal efficiencies of 80, 70 and 0 to 30 % were reached for DMS, toluene and hexane respectively. Two different empty bed residence time (EBRT) were applied on the MBR in order to check the influence of the residence time on the reactor performance. In this case, DMS and toluene removal increased with an increasing EBRT, while the removal of hexane remained constant. By increasing the flow rate of the recirculated liquid from 22 l min-1 to 45 l min-1, the total performance of the biofilter decreased. To increase the mass transfer of hexane in order to get a higher removal, an emulsion of water/silicone oil 80/20 V% was used as recirculated medium at the liquid side of the reactor. This caused a decrease in DMS removal while the removal of toluene remained constant. The variation on the hexane removal decreased significantly, so the reactor became more reliable for degrading hexane.
Keywords
volatile organic compounds, environmental biotechnology, pollution control, biofiltration of waste gases, membranes

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## Citation

Chicago
Volckaert, Diego, Philippe Heynderickx, Sander Wuytens, and Herman Van Langenhove. 2013. “Removal of Dimethylsulfide, N-hexane and Toluene from Waste Air in a Flat Membrane Bioreactor Under Continuous Conditions.” In Biotechniques for Air Pollution Control and Bioenergy, 5th Conference, Proceedings.
APA
Volckaert, D., Heynderickx, P., Wuytens, S., & Van Langenhove, H. (2013). Removal of dimethylsulfide, n-hexane and toluene from waste air in a flat membrane bioreactor under continuous conditions. Biotechniques for Air Pollution Control and Bioenergy, 5th Conference, Proceedings. Presented at the 5th Conference on Biotechniques for Air Pollution Control and Bioenergy.
Vancouver
1.
Volckaert D, Heynderickx P, Wuytens S, Van Langenhove H. Removal of dimethylsulfide, n-hexane and toluene from waste air in a flat membrane bioreactor under continuous conditions. Biotechniques for Air Pollution Control and Bioenergy, 5th Conference, Proceedings. 2013.
MLA
Volckaert, Diego, Philippe Heynderickx, Sander Wuytens, et al. “Removal of Dimethylsulfide, N-hexane and Toluene from Waste Air in a Flat Membrane Bioreactor Under Continuous Conditions.” Biotechniques for Air Pollution Control and Bioenergy, 5th Conference, Proceedings. 2013. Print.
@inproceedings{4256169,
abstract     = {Dimethylsulfide (DMS), n-hexane and toluene removal from a waste air was carried out by using a flat composite membrane bioreactor under continuous feeding conditions. The composite membrane consisted of a dense polydimethylsiloxane top layer with an average thickness of 1.5 \ensuremath{\mu}m supported with a porous polyacrylonitrile layer of 50 \ensuremath{\mu}m. The membrane bioreactor (MBR) was operated during 9 months in which several operational conditions were applied. The inlet load of each compound ranged from 0 to 350 g m-3 h-1 and removal efficiencies of 80, 70 and 0 to 30 \% were reached for DMS, toluene and hexane respectively. Two different empty bed residence time (EBRT) were applied on the MBR in order to check the influence of the residence time on the reactor performance. In this case, DMS and toluene removal increased with an increasing EBRT, while the removal of hexane remained constant. By increasing the flow rate of the recirculated liquid from 22 l min-1 to 45 l min-1, the total performance of the biofilter decreased. To increase the mass transfer of hexane in order to get a higher removal, an emulsion of water/silicone oil 80/20 V\% was used as recirculated medium at the liquid side of the reactor. This caused a decrease in DMS removal while the removal of toluene remained constant. The variation on the hexane removal decreased significantly, so the reactor became more reliable for degrading hexane.},
author       = {Volckaert, Diego and Heynderickx, Philippe and Wuytens, Sander and Van Langenhove, Herman},
booktitle    = {Biotechniques for Air Pollution Control and Bioenergy, 5th Conference, Proceedings},
isbn         = {9782356710581},
keyword      = {volatile organic compounds,environmental biotechnology,pollution control,biofiltration of waste gases,membranes},
language     = {eng},
location     = {N{\^i}mes, France},
pages        = {8},
title        = {Removal of dimethylsulfide, n-hexane and toluene from waste air in a flat membrane bioreactor under continuous conditions},
year         = {2013},
}