Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Comparison of the PO43- Ion Removal Efficiency Using Various PAC Coagulant Types in Sedimentation and Flotation Processes

침전 및 부상 공정에서 PAC 응집제 종류별 PO43- 이온 제거 효율 비교

  • Jeong-Hak Choi (Department of Environmental Engineering, Catholic University of Pusan) ;
  • Ju-Seop Kim (ESTGreen Co., Ltd.) ;
  • Jong-Won Park (Department of Fire and Disaster Prevention, Catholic University of Pusan) ;
  • Seong-Kee Min (K-BIZ) ;
  • Hye-Yeon Lee (K-BIZ) ;
  • Chang-Han Lee (Department of Environmental Administration, Catholic University of Pusan)
  • 최정학 (부산가톨릭대학교 환경공학과) ;
  • 김주섭 ((주)이에스티그린) ;
  • 박종원 (부산가톨릭대학교 소방방재학과) ;
  • 민성기 (한국무기응집제공업협동조합) ;
  • 이혜연 (한국무기응집제공업협동조합) ;
  • 이창한 (부산가톨릭대학교 환경행정학과)
  • Received : 2024.07.24
  • Accepted : 2024.08.24
  • Published : 2024.09.30
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Abstract

In the present study, we aimed to determine the optimal polyaluminum chloride (PAC) dosage in raw water based on the PO43--P concentration using PAC coagulants with aluminum concentrations of 10%, 12%, and 17%. The correlation between the Al/P molar ratio and the removal efficiency of aggregated Al-PO43--P flocs was evaluated using sedimentation and flotation processes. As the PO43--P concentration in the raw water increased, the Al/P molar ratio gradually decreased from 6.14 to 1.98. The Al/P molar ratio of PAC formulations with higher aluminum contents showed a decreasing trend in the following order: PAC 17% < PAC 12% < PAC 10%. An increase in the Al/P molar ratio led to a slight increase in the average particle size of Al-PO43--P flocs formed during the coagulation process. At optimal Al/P molar ratios, PO43--P removal efficiency ranged from approximately 80% to 93% for both the coagulation/precipitation and coagulation/flotation processes. The coagulation/flotation process exhibited a slightly higher PO43--P removal efficiency than coagulation/precipitation.

Keywords

Acknowledgement

2022년 성과공유형 공통기술개발사업 공통기술 R&D(2단계) 사업(RS-2022-00187244)의 지원을 받아 수행되었으며, 이에 감사드립니다.

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