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http://dx.doi.org/10.9713/kcer.2012.50.2.317

Experimental Analysis on Filtration-Permeation: Influence of the Type and Sheets of Filter Media, and Filtration Pressure  

Yim, Sung-Sam (Department of Environmental Engineering, Inha University)
Song, Yun-Min (Department of Environmental Engineering, Inha University)
Publication Information
Korean Chemical Engineering Research / v.50, no.2, 2012 , pp. 317-327 More about this Journal
Abstract
The average specific cake resistance, the most important indicator for cake filtration and solid-liquid separation, is measured by filtration experiment. But the exact value is difficult to measure because of the other influences such as sedimentation during filtration. This study, a little more stable method named filtration-permeation is proposed for measuring average specific cake resistance. The filtration-permeation is composed of permeation of particle eliminated water through pre-formed cake by filtration. Using 1 wt% calcium carbonate suspension, the filtration-permeation experiments were performed for 8 kinds of filter media at the conditions of 0.5 atm and 0.2 atm, 1 and 3 sheets of filter media. At each specific condition, three to five times filtration-permeation were accomplished. As a result, stable permeation speed is measured. According to this experimental result, the characteristics of permeation and the effect of sedimentation are analyzed with Ruth's equation. The one way analysis of variance (one way ANOVA) is applied to the average specific cake resistances of filtration and permeation obtained with the selected three kinds of filter media. The average specific cake resistances between 0.5 atm and 0.2 atm by filtration do not distinguished, but those by permeation is perfectly distinguished. The experimental results during permeation have a very narrow distribution than that measured during filtration. The analysis of filtration experiments, it was verified that the resistance of filter medium by traditional method is of no significance. Finally, the migration of small particles through the medium composed of fiber glass at low pressure was studied.
Keywords
Cake Filtration; Filtration-permeation; Average Specific Cake Resistance; Ruth's Equation; Permeation; Filter Medium; Resistance of Filter Medium;
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