Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Comparing Flotation Efficiency of Algae-Containing Raw Water using PAC Coagulants

PAC 응집제 종류에 따른 조류가 포함된 상수원수의 부상분리효율 비교

  • Received : 2023.03.21
  • Accepted : 2023.04.12
  • Published : 2023.05.31
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Abstract

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%).

Keywords

Acknowledgement

본 논문은 2022년 부산가톨릭대학교 교내학술연구비 및 2021-2022년도 중소기업기술정보진흥원에서 시행한 네트워크형 기술개발사업(연구과제번호: S3029838)의 지원을 받아 수행되었으며, 이에 감사드립니다.

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