碩士 / 國立中山大學 / 環境工程研究所 / 102 / High temperature drying and extrusion granulation operations in the manufacturing process of aquatic feed stuff emit gases with high odor intensities and particulates. Ammonia and amine are the major odor components in the vent gas. In the present study, a lab-scale biotrickling filters (BTF) was used for the treatment of ammonia and odorants in the emitted gas. The BTF was constructed of acrylic (inner size 10 cm sq. × 55 cm H) packed with 5 liters (10 cm sq.×50 cm H) wood chips. The wood chips, obtained from a local pulp-manufacturing plant, had sizes of 3-5 cm, a dry specific surface area of 220 m2/m3, void fraction of 0.63 and wet packing density of 378 kg/m3.
The odorous gas for test was produced by baking a bland of market fishmeal in an oven kept at 100-120oC. The gas was blown into the BTF by a blower. In preliminary trials, with an empty-bed-retention time (EBRT) of 2 s for the gas flowing through the packed section and a supplementary milk of 800 mL/m3.d, 2-8 ppm (average 3.6 ppm) ammonia and 5-20 ppm (average 10.5 ppm) amine in the influent gas could be removed to a degree of 100 and over 95%, respectively. In parameter tests, with gas EBRT 2-8 sec, an adjustment of pH to 6.5 by H3PO4 and a supplementary milk of 200 mL/m3.d, 11-13 ppm ammonia in the influent gas could be reduced to less than 3 ppm. Furthermore, with gas EBRT of 2, 4 and 8 s, odor concentrations of 5,500, 39,000 and 88,400 of the influent gas could be reduced to 1,300, 4,120 and 2,320, respectively. It could be concluded that BTF can reduce the odor intensity of the test gas efficiently. It was estimated that a cost for treating 1,000 m3 of the gas using the BTF is around NT$ 1.3 with an EBRT of 2 s.
| Identifer | oai:union.ndltd.org:TW/102NSYS5515016 |
| Date | January 2014 |
| Creators | Fu-Jie Guo, 郭富傑 |
| Contributors | Ming-Shean Chou, 周明顯 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 67 |
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