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자성 유체분리에 의한 오수의 고도처리
Advanced Treatment of Sewage Using a Magnetic Fluid Separation
부경대학교 화학공학과, 부산 608-739 1포항산업과학연구원 응용환원프로젝트팀, 포항 790-330 2호서대학교 화학공학과, 아산 336-795
Department of Chemical Engineering, Pukyong National University, Pusan 608-739, Korea 1Smelting Reduction Project Team, Research Institute of Industrial Science and Technology, Pohang 790-330, Korea 2Department of Chemical Engineering, Hoseo University, Asan 336-795, Korea
HWAHAK KONGHAK, October 2000, 38(5), 739-744(6), NONE
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Abstract
오수 처리시 최종 침전조에서 침전되지 못한 채 방류수에 포함되어 배출되는 부유 고형물을 일반적인 폐수내 부유고형물과 동일하게 하나의 분체로 보는 관점에서 이들의 제거, 즉 오수의 고도처리에 폐수내 부유고형물의 자성 유체분리 기술을 적용해 보았다. 정화조의 방류수, 즉 2차 처리수에 존재하는 부유 고형물의 농도와 COD 및 탁도와의 관계를 조사하고, 자성 유체분리 실험을 통해 오수내 오염성분의 제거에 대한 조업변수의 영향을 평가하였다. 오수내 TCOD, ICOD 그리고 탁도와 부유고형물의 농도와의 상호관계로부터 오수에 포함된 부유고형물을 고도처리 등을 통해 제거하게 되면 COD와 탁도의 감소를 가져와 수질을 향상시킬 수 있으며, 이때 제거효과는 TCOD, ICOD 그리고 탁도의 순서로 높아지는 것으로 나타났다. 본 실험조건에서 부유고형물의 농도는 20 g/m3, TCOD는 60 g/m3, 탁도는 16 NTU이하로 유지할 수 있어 오수의 고도처리 기술로서 자성 유체분리의 적용 가능성이 확인되었다. 용해성 유기물질의 비율이 높은 오수의 경우 자성 유체분리 처리수내 TCOD의 추가적 감소를 위해서는 별도의 방법이 강구되어야 했다.
A magnetic fluid separation is applied to the advanced treatment of sewage for removing the suspended solids which discharged as being entrained in the effluent from the final settling pond. In this study, the correlation with the concentration of suspended solids in the sewage and COD, with the solid concentration and turbidity, and the effects of operating parameters on the removal of the pollutant materials from the sewage were investigated. It is expected that COD and tubidity in sewage can be reduced by the removal of suspended solids in the sewage. And in result, turbidity was most strongly affected by the removal, and followed by ICOD and TCOD. In the present study, the concentration of suspended solids, TCOD and turbidity could be kept below 20 g/m3, 60 g/m3 and 16 NTU, respectively. The feasibility, therefore, of the magnetic fluid separation as an attractive technology for the advanced treatment of sewage was verified. However a special treatment for the extra reduction of TCOD in the clarified sewage is necessary.
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Tiehm A, Herwig V, Neis U, Water Sci. Technol., 39, 99 (1999)
Park JW, Song YH, J. Korean Soc. Environ. Eng., 20, 305 (1998)
The Ministry of Environment: The Water Quality Preservation Act (1998)
Yeo PM, Kim YH, Suh KH, Suh IK, Theor. Appl. Chem. Eng., 3, 2933 (1997)
Kim YH, Suh KH, Oh CS, HWAHAK KONGHAK, 38(2), 277 (2000)
Kim YH, Yeo PM, Suh KH, Kim HG, Chung UC, Kim SH, J. Korean Fish. Soc., 32, 49 (1999)
