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응집제와 여과매체의 상호작용; Floc 여과를 위한 기초 연구

The Influence of Flocculant to Filter Medium; Fundamental Study for Floc Filtration

인하대학교 환경공학과 1동해대학 환경공업과
Department of Environmental Engineering, Inha University, Korea 1Department of Environmental Technology, Tonghae College, Korea
HWAHAK KONGHAK, December 2000, 38(6), 839-846(8), NONE
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Abstract

플럭 여과의 기본 요건인 응집제와 여과매체의 상호작용을 알기 위하여 실험실에서 흔히 사용하는 세 가지 여과매체에 대하여 다음과 같은 실험을 수행하였다. 여과매체 자체에 대한 입자제거수의 투과실험을 수행하여 여과매체의 투과성질 및 특성을 구명하여 여과매체의 특성을 결정하는 방법을 제안하였다. 그 다음 응집제 용액의 여과실험 및 여과-투과실험을 수행하여 응집제와 여과매체의 상호관계를 연구하였다. 무기응집제 용액의 경우에는 여과매체의 공극의 크기가 큰 경우는 응집제의 씻김 현상이 관찰되었으며, 공극의 크기가 작은 경우에는 점차적인 막힘현상이 관찰되었다. 유기 고분자 응집제 용액의 경우에는 여액이 전혀 통과하지 않는 여과매체의 막힘현상이 일어났다. 응집 후 여과가 이루어지는 경우에 빠른 조작을 위하여 고분자 응집제와 여과매체의 종류가 신중히 결정되어져야 한다.
To know the influence of flocculant on the resistance of filter medium, following experiments were performed for three types of filter media. The characteristics of filter medium were investigated with the permeation of particle eliminated water, and a new method for verifying the medium characteristics were also proposed. Then, the filtration and filtration-permeation for suspensions of inorganic and polymer coagulant were performed to study the influence of flocculent on the filter medium. The inorganic coagulant passed through or blocked the filter medium according to the pore diameter of filter medium. In the experiments with organic polymer solution, the filtration was no longer implemented due to the filter medium absolutely being clogged. It is suggested that the kind of flocculant and filter medium should carefully take consideration to have shorter operation time for a filtration following by coagulation.

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