This study used a batch DAF (dissolved air flotation) jar tester to evaluate the algae removal efficiency of alum and PAC coagulants during coagulation, flocculation, and flotation. Optimal coagulant dosages were 0.06 ~ 0.15 mL/L (12.0 ~ 26.0 mg Al/L,17%), 0.08 ~ 0.20 mL/L (10.0 ~ 24.0 mg Al/L, 12%), 0.25 ~ 0.30 mL/L (25.0 ~ 30.0 mg Al/L, 10%) for PAC, and 3.0 ~ 5.0 mL/L (81.0 ~ 135.0 mg Al/L, 2.7%) for alum. Turbidity of treated water was 1.0 ~ 2.0 NTU in optimal coagulation, flocculation, and flotation conditions for the four coagulants types. The amount of coagulant injected tended to decrease with increasing Al content in the coagulant, as follows : 17% PAC < 12% PAC < 10% PAC < 2.7% alum. Turbidity removal efficiencies were in the order of 12% PAC (93.6%) > 10% PAC (92.7%) > 17% PAC (91.3%) > 2.7% Alum (88.1%).

Abstract
1. 서 론
2. 재료 및 방법
    2.1. 시료수 및 응집제 특성
    2.2. 시료분석 및 측정방법
    2.3. 회분식 부상분리 실험방법
3. 결과 및 고찰
    3.1. 최적 응집제 주입 조건 비교
    3.2. 최적 응집/응결 조건에서 부상분리 효율 비교
4. 결 론
감사의 글
REFERENCES

• 이창한(부산가톨릭대학교 환경행정학과) | Chang-Han Lee (Department of Environmental Adminstration, Catholic University of Pusan, Busan 46252, Korea) Corresponding Author
• 윤철종(부산광역시 상수도사업본부) | Churl-Jong Yun (Busan Water Authority, Busan 47210, Korea)
• 이혜연(EFT(주)) | Hye-Yeon Lee (EFT Co. Ltd., Yangsan 50590, Korea)
• 민성기(EFT(주)) | Seong-Kee Min (EFT Co. Ltd., Yangsan 50590, Korea)
• 박종원(부산가톨릭대학교 소방방재학과) | Jong-Won Park (Department of Fire and Disaster Prevention, Catholic University of Pusan, Busan 46252, Korea)