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A Study on the Production of VFAs from Sewage Sludge by Fenton's Oxidation  

Han, Kum-Seok (Department of Chemical and Environmental Engineering, SoongSil University)
Nam, Young-Woo (Department of Chemical and Environmental Engineering, SoongSil University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.27, no.2, 2005 , pp. 184-190 More about this Journal
Abstract
A new VFAs production process from sewage sludge using Fenton's oxidation was investigated. Optimum concentrations of $H_2O_\;and\;Fe^{2+}$ as well as optimum reaction temperature for VFAs production were studied. In the presence of $Fe^{2+}$ as catalyst, the VFAs formation rate increased about 4 times compared to $H_2O_2$ oxidation process without $Fe^{2+}$. Optimum concentrations of $H_2O_2$ and $Fe^{2+}$ were 0.62 M and 0.007 M, respectively. VFAs formation reaction proceeded rapidly within 1 min and VFAs formed degraded partly to acetic acid and $CO_2$, which exhibited series reaction characteristics. Based on the economic aspect, reaction temperature of $25^{\circ}C$ and 10 min of reaction time were thought to be proper reaction conditions. The effect of initial pH in the range of $3{\sim}6.3$ on the VFAs formation was not observed.
Keywords
Fenton's Oxidaation; Sewage Sludge; VFAs; $H_2O_2$ Oxidation; OH Radical;
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