| Title |
Removal of Geosmin Forming Alga (Anabaena macrospora) by Copper Sulfate |
| Authors |
박재충 ( Jae Chung Park ) ; 박재범 ( Jae Bum Park ) ; 송성일 ( Sung Il Song ) ; 김현숙 ( Hyun Suk Kim ) ; 박정원 ( Jung Won Park ) |
| Keywords |
Anabaena macrospora; CuSO4; Drinking water; Geosmin; Water purification plant |
| Abstract |
We have studied the possibility of removing Anabaena macrospora by injecting copper sulfate (CuSO4 · 5H2O) 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 ㎎/L of CuSO4. We were able to reduce the standing crops of A. macrospora effectively because CuSO4 could break A. macrospora selectively. Because 0.3 ㎎/L of CuSO4 could break both cells and akinetes, it reduced the possibility of a recurrent problem for them to meet a favorable condition. When CuSO4 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 ㎎/L of CuSO4. The water quality, alkalinity, conductivity, hardness and pH didn`t changed by the injection of CuSO4. |