Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Effect of the Various Heavy Metals on the Growth and Phosphorus (P) Removal Capacity of the Phosphorus Accumulating Microorganism (Pseudomonas sp.)

다양한 중금속이 인 축적 미생물 (Pseudomonas sp.)의 생장과 인 제거에 대한 효과

  • Kim, Hee-Jung (Department of Agricultural Chemistry, Chungbuk National University) ;
  • Yoo, Ri-Bi (Department of Agricultural Chemistry, Chungbuk National University) ;
  • Han, Seok-Soon (Department of Agricultural Chemistry, Chungbuk National University) ;
  • Woo, Sun-Hee (Department of Crop Science, Chungbuk National University) ;
  • Lee, Moon-Soon (Department of Industrial Plant, Chungbuk National University) ;
  • Baek, Ki-Tae (Department of Environmental Engineering, Kumoh National University) ;
  • Chung, Keun-Yook (Department of Agricultural Chemistry, Chungbuk National University)
  • Received : 2010.05.25
  • Accepted : 2010.06.08
  • Published : 2010.06.30
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Abstract

The removal of phosphorus (P) in the wastewater is essential for the prevention of eutrophication in the river and stream. This study was initiated to evaluate the effect of the various heavy metals on the growth and P removal capacity of Pseudomonas sp., which was well known as phosphorus accumulating microorganism(PAO's) in the EBPR(Enhanced Biological Phosphorus Removal) process. The five heavy metals used in the study were Cu, As, Zn, Ni, and Cd. The growth rate of Pseudomonas sp. was the greatest at $25^{\circ}C$, but the removal efficiency of P was the highest at $30^{\circ}C$. The $IC_{50}$ (median Inhibition Concentration) values of Pseudomonas sp. for the Cu, As, Zn, Ni, and Cd were 2.35, 11.04, 1.80, 4.92, and 0.24 mg/L, respectively. Therefore, it appears that the sensitivity of the heavy metals to Pseudomonas sp. was in the following order: Cd> Zn> Cu> Ni> AS. Also, the P removal efficiencies by Pseudomonas sp. were correspondingly decreased as the concentrations of heavy metals were increased.

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References

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