| Abstract |
| In this study, the iron electrolysis device was applied to the SBR process for advanced treatment of phosphorus. In addition, the automatic control precipitation system which controlled the optimum chemical dosage depending on the phosphorus concentration, was used in the SBR process to increase phosphorus removal efficiency. The iron electrolysis devices were composed of steel plate modules, which were installed in the SBR reactor, and DC power supply for Fe3+ ions, leaching by electrolytic oxidation reaction. SS41 steel materials were used in this study. The influent characteristics which was used the A small wastewater treatment plant influent, were the CODcr 170mg/L, TP 2.65mg/L, TN 33.6mg/L, MLSS 2,850mg/L and average SRT 15d, respectively. When the iron electrolysis device was applied to the SBR process, the CODcr removal efficiency increased from 69.1% to 83.9%, total nitrogen increased from 62.5% to 62.7%, and total phosphorus increased from 45.5% to 85.7%. The overall removal efficiency of CODcr, TN, and TP were 87.9%, 65.5%, and 97.4%, respectively, based on the complex SBR system which was composed of the iron electrolysis device and the automatic control precipitation system, showing the excellent performance characteristics of phosphorus removal compared to the existing SBR process. By applying the iron electrolysis device in the SBR process, the chemical dosage could be reduced by 66% in the automatic control precipitation system. |
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| Key Words |
| Advanced wastewater treatment, Automatic control precipitation, Iron electrolysis device, Phosphorus removal, SBR |
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