Removal of Geosmin Forming Alga (Anabaena macrospora) by Copper Sulfate

CuSO4에 의한 geosmin 유발조류(Anabaena macrospora)의 제거

  • Park, Jae-Chung (Andong Dam Office, Korea Water Resources Corporation) ;
  • Park, Jae-Bum (Changwon Regional Office, Korea Water Resources Corporation) ;
  • Song, Sung-Il (Northern Nakdong River Regional Water Quality Analysis Center, Korea Water Resources Corporation) ;
  • Kim, Hyun-Suk (Southern Nakdong River Regional Water Quality Analysis Center, Korea Water Resources Corporation) ;
  • Park, Jung-Won (Department of Biology, Kyungpook National University)
  • 박재충 (한국수자원공사 안동댐관리단) ;
  • 박재범 (한국수자원공사 창원권관리단) ;
  • 송성일 (한국수자원공사 낙동강북부권수질검사소) ;
  • 김현숙 (한국수자원공사 낙동강남부권수질검사소) ;
  • 박정원 (경북대학교 생물학과)
  • Received : 2005.12.30
  • Accepted : 2006.03.22
  • Published : 2006.05.30

Abstract

We have studied the possibility of removing Anabaena macrospora by injecting copper sulfate ($CuSO_4{\cdot}5H_2O$) into the raw water of a drinking water purification plant. Anabaena macrospora caused the unpleasant geosmin odor of drinking water in August 2001. The cell break-point of A. macrospora was 0.3 mg/L of $CuSO_4$. We were able to reduce the standing crops of A. macrospora effectively because $CuSO_4$ could break A. macrospora selectively. Because 0.3 mg/L of $CuSO_4$ could break both cells and akinetes, it reduced the possibility of a recurrent problem for them to meet a favorable condition. When $CuSO_4$ was injected in the early growth phase of algae and the mixing intensity was high, A. macrospora could be removed most effectively. The odor caused by A. macrospora was sustained for a while without any sudden change of environmental condition. Therefore, we hope that it could shorten the period of obstacle by injecting the optimal amount of 0.3 mg/L of $CuSO_4$. The water quality, alkalinity, conductivity, hardness and pH didn't changed by the injection of $CuSO_4$.

Keywords

References

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