Abstract
Removal of malodorous gases from swine manure by a polyurethane biofilter inoculated with heterotrophic and autotrophic bacteria was investigated. Ammonia, hydrogen sulfide and other gases could be efficiently treated at 3-3.6 second of empty bed retention time by the polyurethane biofilter. In the range of SV 200-1,200h-1 the average removal efficiency of odor was about 89% when the odor unit of inlet gas was below 4100. Odor elimination capacity of the polyurethane biofilter was 1.8 x 105-5.0 x 107 OU-3.h--1 that were 84-90% of the inlet load. The critical loads of NH3 and H2S, which mean 97% removal with respect to the inlet loads, were 31 and 27 g.m-3.h-1 respectively. The maximum elimination capacities of NH3 and H2S were 56 and 157 g.m-3.h-1, respectively. Although the removability for NH3 and H2S was not influenced by H2S/NH3 ratio (ppmv/ppmv), the H2S removability was inhibited by high H2S concentration more than 80 ppmv.
Original language | English |
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Pages (from-to) | 91-97 |
Number of pages | 7 |
Journal | Korean Journal of Applied Microbiology and Biotechnology |
Volume | 30 |
Issue number | 1 |
State | Published - 2002 |
Keywords
- Ammonia
- Biofilter
- Hydrogen sulfide
- Malodorous gases
- Odor unit
- Swine manure