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습식 화학적 방법에 의한 하수 슬러지 소각재에서의 인 회수 기술동향 KCI 등재

Trends of phosphorus recovery technology from sewage sludge ash by wet chemical method

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상하수도학회지 (Journal of the Korean Society of Water and Wastewater)
대한상하수도학회 (Korean Society Of Water And Wastewater)
초록

Phosphorus (P) is a limited, essential, and irreplaceable nutrient for the biological activity of all the living organisms. Sewage sludge ash (SSA) is one of the most important secondary P resources due to its high P content. The SSA has been intensively investigated to recover P by wet chemicals (acid or alkali). Even though H2SO4 was mainly used to extract P because of its low cost and accessibility, the formation of CaSO4 (gypsum) hinders its use. Heavy metals in the SSA also cause a significant problem in P recovery since fertilizer needs to meet government standards for human health. Therefore, P recovery process with selective heavy metal removal needs to be developed. In this paper some of the most advanced P recovery processes have been introduced and discussed their technical characteristics. The results showed that further research is needed to identify the chemical mechanisms of P transformation in the recovery process and to increase P recovery efficiency and the yields.

목차
ABSTRACT
 1. 서 론
  1.1 연구 배경
  1.2 인 회수 및 재활용의 필요성
  1.3 인 화합물의 종류 및 특징
  1.4 인의 화학적 결합
   1.4.1 인의 응집 및 침전
   1.4.2 인 표면 복합체 형성(Surface complexation)
   1.5 하수 슬러지 소각재(SSA)의 특징
 2. 습식 화학적 인 회수 기술 연구 개발 동향
  2.1 인의 제거 및 회수 기술
   2.1.1 물리・화학적 처리 기술
    2.1.1.1 알루미늄을 이용한 인의 응집 침전
    2.1.1.2 철을 이용한 인의 응집 침전
    2.1.1.3 칼슘을 이용한 인의 응집 침전
   2.1.2 생물학적 인 처리 기술 (EBPR)
  2.2 SSA로부터의 습식화학적 방법에 의한 인 회수기술
   2.2.1 SSA를 이용한 습식 화학적 인 회수
   2.2.2 초기의 습식 화학적 인 회수 기술
   2.2.3 염기를 이용한 인 용출
   2.2.4 산을 이용한 인의 용출
    2.2.4.1 H2SO4를 이용한 인의 용출
    2.2.4.2 HCl을 이용한 인의 용출
 3. 인 회수 기술의 경제성, 환경친화성 및발전방향
 4. 결 론
 사 사
 References
저자
  • 이민수(한림대학교 환경생명공학과 및 에너지환경연구소, Department of Environmental Science and Biotechnology & Institute of Energy and Environment, Hallym University) | Min-Su Lee
  • 김동진(한림대학교 환경생명공학과 및 에너지환경연구소, Department of Environmental Science and Biotechnology & Institute of Energy and Environment, Hallym University) | Dong-Jin Kim Corresponding author