TY - JOUR AU - Pham Tran AU - Luu Tran PY - 2021/08/23 Y2 - 2024/03/29 TI - Study of the treatment of leachate after biodigestion using Electro-fenton method JF - Science & Technology Development Journal: Science of the Earth & Environment JA - STDJSEE VL - 5 IS - 2 SE - Original Research DO - https://doi.org/10.32508/stdjsee.v5i2.564 UR - http://stdjsee.scienceandtechnology.com.vn/index.php/stdjsee/article/view/564 AB - Leachate contains many non-biodegradable organic compounds and nutrients with high concentrations, especially from urban waste landfills with long operating times (> 10 years), which affects the human health and environmental quality. Electro-Fenton is one of the advanced oxidation processes (AOPs) that has been recently studied for the treatment of many persistent organic compounds in water. In this study, post-biological leachate (continuous flow biological tank) was treated using Electro-Fenton method with heterogeneous catalysts as Iron (II) Sulfide and Iron Oxide on two electrodes Ti/IrO2-Ta2O5 and Ti/RuO2. The effect of different pH conditions on the pollutant removal efficiency in landfill leachate was studied. The results show that Ti/IrO2-Ta2O5 electrode and Iron (II) Sulfide catalyst obtain better leachate treatment performance than the others under the same experimental conditions. The heterogeneous Electro-Fenton process was capable of removing 71% of chemical oxygen demand (COD), 88% of total organic carbon (TOC), 89% of total nitrogen (TN), 93% of ammonium nitrogen N-NH4 + and 99% color at Ti/IrO2-Ta2O5 electrode and Iron (II) Sulfide catalyst at a pH 3, current density 333 mA/cm2 after 90 minutes of electrolysis. The results showed that the Electro-Fenton method capable effective treatment of pollutants in the post-biological leachate in the future. ER -