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KMID : 0545120000100030419
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Journal of Microbiology and Biotechnology
2000 Volume.10 No. 3 p.419 ~ p.422
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Simultaneous Removal of Hydrogen Sulfide and Ammonia Using Thiobacillus sp.IW in a Three-Phase Fhase Fluidized-Bed Bioreactor
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KIM, SUNG-HOON
OH, KWANG-JOONG/MOON, JONG-HAE/KIM, DONGUK
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Abstract
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A three-phase fluidized-bed bioreactor including Thiobacillus sp. IW was tested to remove H_2S and NH_3 simultaneously. The inlet H_2S was oxidized to SO^2-_4 by Thiobacillus sp. IW, and the NH_3 reacted with the SO^2_4 to form (NH_4)_2SO_4. The removal efficiency of H_2S was 98.4-99.9% for an inlet concentration of 36-730ppm and that of NH_3 was 60.2-99.2% for an inlet concentration of 45-412ppm. The removal efficiency of NH_3 was reduced when the inlet loading rate of NH_3 was increased above 10㎎/l/h. When the bioreactor was operated for 25 days with a lower inlet concentration of NH_3 compared with that of H_2S, the bioreactor exhibited an excellent performance with a stable pH, dissolved oxygen content, and cell concentration.
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