Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Effects of dolomite addition on phosphorus removal by chemical coagulation of secondary treated effluent

백운석 첨가가 응집에 의한 하수 처리수의 인 제거에 미치는 영향

  • 이병하 (한국과학기술연구원 물자원순환연구단) ;
  • 박준홍 (연세대학교 사회환경시스템공학부) ;
  • 차호영 (엔비너지(주)) ;
  • 맹승규 (세종대학교 건설환경공학과) ;
  • 송경근 (한국과학기술연구원 물자원순환연구단)
  • Published : 2012.06.15
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Abstract

Wastewater treatment plants need to reduce phosphorus in order to meet increasingly stringent regulations on phosphorus. This study evaluated the feasibility of dolomite as a coagulation aid to enhance phosphorus removal from secondary treated wastewater by chemical coagulation. Standard jar tests were conducted to evaluate the effect of dolomite addition on a coagulation process for phosphorus removal and to determine the optimum doses of coagulants and dolomite. Coagulants used with dolomite yielded a significant improvement in phosphorus removal and reduced total phosphorus concentrations below 0.02 mg/L in wastewater effluent. Dolomite has played an important role in enhancing phosphate adsorption and increasing pH, as a coagulation aid. The maximum removal efficiency of phosphorus in this study was yielded at 25 mg/l of dolomite and 20 mg Al/L of PAC dose. However, considering economic aspects, the optimum doses of dolomite and PAC were 10 mg/L and 15mg Al/L, respectively. Consequently, dolomite, a coagulation aid, can be used in coagulation processes to enhance the removal of phosphorus.

Keywords

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