Thiobacillus Bacterial Leaching of Copper from Solid Waste

  • Lee, Yoon-Hee (Dept. of Applied Chemical Engineering, Korea University of Technology & Education) ;
  • Cho, Eun-Kyung (Dept. of Applied Chemical Engineering, Korea University of Technology & Education) ;
  • Cho, Nam-Jun (Dept. of Applied Chemical Engineering, Korea University of Technology & Education)
  • 발행 : 2003.10.22

초록

T.f. 및 T.t. 박테리아의 흡착정도와 침출효율 간에 선형적인 비례관계는 관찰되지 않았다. 동일 배양균에서 재생로의 분진 즉 기질입자의 크기가 감소함에 따라 박테리아의 흡착정도와 Cu의 추출속도는 분명하게 선형적으로 증가했다. 다른 종류의 기질에 비해 재생로 분진에서 침출속도가 빠른 것은 주로 분진입자의 부서지기 쉬운 성질 때문으로 추정된다.

Maximum adsorption amount of the mixed culture, $2.06{\times}10^{11} cells/g$ is closed to the sum of that of each bacterial component: $1.39{\times}10^{11}cells/g$ for T. ferrooxidans and $1.08{\times}10^{11}cells/g$ for T. thiooxidans. These indicate that the two bacterial species have almost independent preferential adsorption sites on furnace dust. However, the efficiency of leaching, 35% for mixture, 45% for T.f. and 30% for T.t., was not linearly related to the ratio of adsorption in three different systems even though it was increased in parallel with the bacterial adsorption in the same system.

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