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Development of Porous Media for Sewage Treatment by Pyrolysis Process of Food Wastes with Loess  

Kim, Sang-Bum (Environment and Energy Division, Korea Institute of Industrial Technology(KITECH))
Lee, Myong-Hwa (Environment and Energy Division, Korea Institute of Industrial Technology(KITECH))
Kim, Yong-Jin (Environment and Energy Division, Korea Institute of Industrial Technology(KITECH))
Park, Chul-Hwan (Department of Chemical Engineering, Kwangwoon University)
Lee, Jong-Rae (Golden Universal Co., Ltd.)
Kim, Gyung-Soo (Environment and Energy Division, Korea Institute of Industrial Technology(KITECH))
Publication Information
Journal of Korean Society of Environmental Engineers / v.29, no.3, 2007 , pp. 289-296 More about this Journal
Abstract
Porous media for sewage treatment were developed through a pyrolysis process of food wastes with loess in the study. This work was carried out in two consecutive stages; in the first stage, new porous media were prepared through a high temperature pyrolysis process, and then the resultant media were applied to a simple lab-scale sewage treatment process in the second stage. To determine the optimum operating conditions of pyrolysis and mixing ratio of materials, physical properties such as specific surface area, porosity and compressive strength of final products were analyzed. The removal efficiencies of TOC and COD were measured to evaluate the effectiveness of resultant porous media. As a result of the experiment, we found that the best mixing ratio of food wastes to loess was 1 : 1 at $1,100^{\circ}C$. Average porosity of the developed media was 37.0%, in which pore size ranged from 1 to $20{\mu}m$, showing quite vigorous microbial activation. After immersing the media into a reactor for sewage treatment for eight days, removal efficiencies of TOC and COD were 87.3% and 85.0%, respectively.
Keywords
Pyrolysis; Food Waste; Loess; Porous Media; Sewage Treatment;
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