DOI QR코드

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하수처리시설에서 인 고도처리를 위한 일체형 침전부상공정(SeDAF)의 응집제 주입농도 자동제어기법 검토

Automatic control of coagulant dosage on the sedimentation and dissolved air flotation(SeDAF) process for enhanced phosphorus removal in sewage treatment facilities

  • 장여주 (과학기술연합대학원대학교 건설환경공학) ;
  • 정진홍 (한국건설기술연구원 국토보전연구본부 환경자원재생연구센터) ;
  • 김원재 (한국건설기술연구원 국토보전연구본부 환경자원재생연구센터)
  • Jang, Yeoju (Civil & Environmental Engineering, University of Science and Technology (UST, KICT school)) ;
  • Jung, Jinhong (Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT)) ;
  • Kim, Weonjae (Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT))
  • 투고 : 2020.08.30
  • 심사 : 2020.11.05
  • 발행 : 2020.12.15

초록

To remove phosphorus from the effluent of public wastewater treatment facilities, hundreds of enhanced phosphorus treatment processes have been introduced nationwide. However, these processes have a few problems including excessive maintenance cost and sludge production caused by inappropriate coagulant injection. Therefore, the optimal decision of coagulant dosage and automatic control of coagulant injection are essential. To overcome the drawbacks of conventional phosphorus removal processes, the integrated sedimentation and dissolved air flotation(SeDAF) process has been developed and a demonstration plant(capacity: 100 ㎥/d) has also been installed. In this study, various jar-tests(sedimentation and / or sedimentation·flotation) and multiple regression analyses have been performed. Particularly, we have highlighted the decision-making algorithms of optimal coagulant dosage to improve the applicability of the SeDAF process. As a result, the sedimentation jar-test could be a simple and reliable method for the decision of appropriate coagulant dosage in field condition of the SeDAF process. And, we have found that the SeDAF process can save 30 - 40% of coagulant dosage compared with conventional sedimentation processes to achieve total phosphorus (T-P) concentration below 0.2 mg/L of treated water, and it can also reduce same portion of sludge production.

키워드

과제정보

본 연구는 한국건설기술연구원 주요사업의 연구비 지원으로 수행되었습니다(과제번호: 20200425). 이에 감사드립니다.

참고문헌

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