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DOI : ,    Vol.6, No.2, 11 ~ 18, 1998
Title
Removal of Color and Organic Substances Ushag Granular Activated Carbon for Wastewater Reclamation
안규홍Kyu Hong Ahn,송경근Kyung Guen Song,권지향Ji Hyang Kweon,차호영Ho Young Cha
Abstract
A study was conducted to investgate the adsorption characteristics of granular activated carbon(GAC) for color and organic substances removal from the secondary treated effluent. The effluent from rotating biological contactor was used in batch tests, isotherm adsorption tests and fixed bed experiments. Single media column packed with GAC and dual media column packed with sand and GAC were used in fixed bed experiments. It was founded that adsorption rate of color in the secondary treated wastewater was slower than that of the synthetic organic matter, such as o-chlorophenol. The coefficient derived from Freundlich isotherm equation, 1/n, was about 1. It was concluded that it is difficult for GAC to adsorb color which is composed of complex matter. In fixed bed experiments, removal rate of organic substance increased with the degree of bed clogging. Time for 90% of breakthrough of color increased as empty bed contact time(EBCT) increased. Since premature breakthrough of color can occur when background organic matter(BOM) exists in water. It was also founded that longer EBCT than that generally applied (around 10 minutes) should be adopted, to obtain stable water quality.
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