한국환경과학회지 (Journal of Environmental Science International)

  • 제32권10호
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  • Pages.731-739
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  • 2023
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  • 1225-4517(pISSN)
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  • 2287-3503(eISSN)
한국환경과학회 (The Korean Environmental Sciences Society)
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Al 함량이 다른 PAC를 이용한 응집 조건 별 인 제거효율 평가

Evaluation of Phosphorus Removal Efficiency at Various Coagulation Conditions Using Polyaluminum Chloride with Different Al Contents

  • 최정학 (부산가톨릭대학교 환경공학과) ;
  • 윤건곤 (부산가톨릭대학교 청정시스템공학과) ;
  • 이창한 (부산가톨릭대학교 환경행정학과)
  • Jeong-Hak Choi (Department of Environmental Engineering, Catholic University of Pusan) ;
  • Geon-Gon Yoon (Department of Green Process System Engineering, Catholic University of Pusan) ;
  • Chang-Han Lee (Department of Environmental Administration, Catholic University of Pusan)
  • 투고 : 2023.10.13
  • 심사 : 2023.10.25
  • 발행 : 2023.10.31
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초록

In this study, lab-scale phosphorus coagulation/precipitation experiments were performed using three types of polyaluminum chloride (PAC) with different Al contents (10%, 12%, and 17%). The PO4-P removal efficiencies at various operating conditions, such as initial PO4-P concentration, initial pH, and Al/P molar ratio, were evaluated, and correlations among the operating factors affecting phosphorus coagulation/precipitation with PAC were derived to optimize the process efficiency. When the initial PO4-P concentration was 0.065 and 0.161 mmol P/L under an initial pH of 8-10, the optimal PAC dose was 0.126-0.378 and 0.189-0.667 mmol Al/L, respectively. Under these conditions, the Al/P molar ratio was 2.16-6.18 and 1.28-4.30, respectively, and the PO4-P removal efficiency was in the range of 40.2-92.5%. When the Al/P molar ratio was 2 or less under an initial pH condition of 6-8, the PO4-P removal efficiency was approximately ≤40% owing to insufficient Al3+ ions. However, when the Al/P molar ratio is 3-5, the PO4-P removal efficiency improved to approximately 80-90%. Thus, the optimal Al/P molar ratio to achieve a PO4-P removal efficiency of over 90% was determined to be approximately 4 in the PO4-P coagulation/precipitation process using PAC.

키워드

과제정보

본 논문은 2023년 부산가톨릭대학교 교내학술연구비 및 중소기업기술정보진흥원에서 시행한 2022년 성과공유형 공통기술개발사업 공통기술R&D(2단계) 사업임(RS-2022-00187244)의 지원을 받아 수행되었으며, 이에 감사드립니다.

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