A laboratory-scale biotrickling filter (BTF, inner size 14cm ¡Ñ 14cm ¡Ñ 120cmH, packed with fern chips to a height of 100 cm and volume of 19.6 L) was used to test the feasibility of removing odorous compounds emitted from rubber-processing operations. In addition, granule activated carbon (GAC) adsorption and permanganate solution scrubbing were also tested in order to further reduce the odor intensity of vented gas from the BTF.
Results indicated that with the operation conditions of EBRT (empty bed retention time) of 20-40 s for the gas through the packed space and VOCs of 5-50 ppm (as methane) for the influent gas to the BTF, approximately 96-97% of ketones (acetone and methyl ethyl ketone) and 50% of toluene and carbon disulfide in the influent gas could be removed. However, there was no significant removal for alkanes by the BTF. The overall VOC and odor removals were both around 80% at an EBRT of 23 s.
Performances of GAC adsorption of the residual chemicals in the vented gas from the BTF were better than those of permanganate solution scrubbing. The overall VOC removal by the BTF-GAC system was around 90% and the overall odor (expressed as the dilution to threshold D/T value) removal was even better than that of VOC. A test indicated that D/T were 1303, 733, and 23, respectively, for the influent, BTF effluent, and GAC effluent, and the overall efficiency for the odor removal was 98.2%. It was estimated that the cost is around NT$ 70 for treating 1,000 m3 of the teat gas by the GAC. Efforts should be made by decreasing the cost by other alternative technologies.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0802109-152236 |
| Date | 02 August 2009 |
| Creators | Sue, Heng-kuan |
| Contributors | XU, MEI-JUAN, ZHOU, MIN-XIAN, Yuan-Chung Lin |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0802109-152236 |
| Rights | unrestricted, Copyright information available at source archive |
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