The Effect of Light Source on the Anaerobic Oxidation Rate of Dissolved Hydrogen Sulfide by Phototrophic Bacterium <I>Chlorobium limicola</I>

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  • 光独立栄養細菌<I>Chlorbium limicola</I>による溶存硫化水素の嫌気的酸化速度に及ぼす光源の影響
  • 光独立栄養細菌Chlorobium limicolaによる溶存硫化水素の嫌気的酸化速度に及ぼす光源の影響
  • ヒカリ ドクリツ エイヨウ サイキン Chlorobium limicola ニ ヨル ヨウゾン リュウカ スイソ ノ イヤケテキ サンカ ソクド ニ オヨボス コウゲン ノ エイキョウ

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Abstract

The anaerobic oxidation of dissolved H2S into elemental sulfur was studied at 23°C and pH 6.5±0.3 in a continuous culture of the phototrophic green sulfur bacterium Cblorobium limicola using different light sources. The maximum H2S oxidation rate measured using a near infrared LED (light-emitting diode with a peak emission at 735±25 nm) at 10 lx was comparable to that using the white fluorescent lamps (wave length range of 300-800 nm) at 5000 lx. This suggests that both light sources achieve nearly identical light energies in the long wavelength region of 735±25 nm. Moreover, the combined use of the infrared LED and the white fluorescent lamps provided a 30% increase in the maximum oxidation rate per unit reactor volume.

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