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여과 평균 비저항값의 측정에 대한 고찰: 입자 현탁액과 응집물의 케이크 여과

Study on the Measurement of Average Specific Cake Resistance in Cake Filtration of Particulate Suspension and Sedimented Floc

임성삼^† 송연민 전세진¹

Sung Sam Yim^† Yun Min Song Se Jin Jun¹

인하대학교 환경공학과, 인천 402-751 ¹대원과학대학 환경생명과, 제천 390-702

Department of Environmental Engineering, Inha University, Inchon 402-751, Korea ¹Department of Environment and Life Science, Daewon Science College, Jechon 390-702, Korea

HWAHAK KONGHAK, June 2002, 40(3), 330-339(10), NONE

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Abstract

케이크 여과에서 평균 비저항값의 정확한 측정은 산업 현장이나 연구면에서 기본적이면서 대단히 중요한 사항이나 이에 대한 자세한 연구가 이루어지지 않고 있었다. 본 연구에서는 실험과 이론적인 분석을 통하여 현탁액중의 입자와 여과매체 세공의 상대적인 크기, 현탁액의 초기 농도, 여과 진행중의 침전 속도, 여과 시작 전의 사전 침전이 여과 평균 비저항에 미치는 영향의 정도를 연구하였으며, 이런 영향들을 배제하고 정확한 평균 비저항값을 연구하는 방법을 제안하였다. 또한 침전시킨 플럭의 여과에서 케이크의 고형분 함량을 결정하는 방법을 제안하였으며, 이 방법을 사용하지 않는 경우 평균 비저항값이 정확한 값의 52%로 측정되는 경우도 있음을 입증하였다.

The exact measurement of average specific resistance in a cake filtration is fundamental and important for the industrial operation and research. In spite of the importance, the influences of the relative size between the particles in suspension and pores of filter medium, the initial concentration of suspension, the velocity of sedimentation during filtration, the pre-sedimentation time before the start of filtration to the measured values of average specific cake resistance were not been studied. These phenomena have been studied experimentally and analyzed, then the methods to eliminate such effects to measure the accurate specific cake resistance are proposed. A method of measuring the exact solid content of a cake for the floc filtration is also proposed. Without this method the average specific cake resistance would be measured only 52% of the exact value.

Keywords

Filtration Cake Filtration Filtration-Permeation Floc Filtration Sedimentation During Cake Filtration

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