Fenton Oxidation Combined with Iron–Carbon Micro-Electrolysis for Treating Leachate Generated from Thermally Treated Sludge
In this study, Iron–Carbon Micro-Electrolysis (ICME), Fenton oxidation, and their combination were investigated to treat the leachate obtained from a wastewater treatment plant located in southern China. The results show that the Fenton-ICME process was the most efficient one. After the leachate was...
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MDPI AG
2023-11-01
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| Online Access: | https://www.mdpi.com/2297-8739/10/11/568 |
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| author | Xiaoqing Dong Hui Liu Ji Li Ruiqi Gan Quanze Liu Xiaolei Zhang |
| author_facet | Xiaoqing Dong Hui Liu Ji Li Ruiqi Gan Quanze Liu Xiaolei Zhang |
| author_sort | Xiaoqing Dong |
| collection | DOAJ |
| description | In this study, Iron–Carbon Micro-Electrolysis (ICME), Fenton oxidation, and their combination were investigated to treat the leachate obtained from a wastewater treatment plant located in southern China. The results show that the Fenton-ICME process was the most efficient one. After the leachate was treated with the Fenton-ICME process, the COD concentration was reduced from the initial 35,772 mg/L to 13,522 mg/L, and the removal efficiency was up to 62.2%. In addition, the biological oxygen demand (BOD) to COD ratio increased by 40% at optimal conditions. This suggests that the biodegradability of the leachate has been increased, facilitating the biodegradation of the leachate after it is mixed with the raw wastewater. By studying the characteristic variation of the leachate treated with the Fenton-ICME process, it was found that the combined process mainly removes organic compounds such as aromatic compounds, ketones, and aldehydes. The separated sludge does not have a crystalline structure, and the iron in it mainly exists in the form of trivalent iron. It reveals that the Fenton-ICME process has great potential to be used as a pretreatment of leachate. |
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| institution | Directory Open Access Journal |
| issn | 2297-8739 |
| language | English |
| last_indexed | 2024-03-09T16:27:49Z |
| publishDate | 2023-11-01 |
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| spelling | doaj.art-c8fbbb15a81342cd9e2b9e639a63a8562023-11-24T15:06:10ZengMDPI AGSeparations2297-87392023-11-01101156810.3390/separations10110568Fenton Oxidation Combined with Iron–Carbon Micro-Electrolysis for Treating Leachate Generated from Thermally Treated SludgeXiaoqing Dong0Hui Liu1Ji Li2Ruiqi Gan3Quanze Liu4Xiaolei Zhang5Department of Environmental Engineering Technology, Shenzhen Institute of Information Technology, Shenzhen 518172, ChinaDepartment of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, ChinaDepartment of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, ChinaDepartment of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, ChinaDepartment of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, ChinaDepartment of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, ChinaIn this study, Iron–Carbon Micro-Electrolysis (ICME), Fenton oxidation, and their combination were investigated to treat the leachate obtained from a wastewater treatment plant located in southern China. The results show that the Fenton-ICME process was the most efficient one. After the leachate was treated with the Fenton-ICME process, the COD concentration was reduced from the initial 35,772 mg/L to 13,522 mg/L, and the removal efficiency was up to 62.2%. In addition, the biological oxygen demand (BOD) to COD ratio increased by 40% at optimal conditions. This suggests that the biodegradability of the leachate has been increased, facilitating the biodegradation of the leachate after it is mixed with the raw wastewater. By studying the characteristic variation of the leachate treated with the Fenton-ICME process, it was found that the combined process mainly removes organic compounds such as aromatic compounds, ketones, and aldehydes. The separated sludge does not have a crystalline structure, and the iron in it mainly exists in the form of trivalent iron. It reveals that the Fenton-ICME process has great potential to be used as a pretreatment of leachate.https://www.mdpi.com/2297-8739/10/11/568sludge leachateiron–carbon micro-electrolysisFenton oxidationwastewater treatment |
| spellingShingle | Xiaoqing Dong Hui Liu Ji Li Ruiqi Gan Quanze Liu Xiaolei Zhang Fenton Oxidation Combined with Iron–Carbon Micro-Electrolysis for Treating Leachate Generated from Thermally Treated Sludge Separations sludge leachate iron–carbon micro-electrolysis Fenton oxidation wastewater treatment |
| title | Fenton Oxidation Combined with Iron–Carbon Micro-Electrolysis for Treating Leachate Generated from Thermally Treated Sludge |
| title_full | Fenton Oxidation Combined with Iron–Carbon Micro-Electrolysis for Treating Leachate Generated from Thermally Treated Sludge |
| title_fullStr | Fenton Oxidation Combined with Iron–Carbon Micro-Electrolysis for Treating Leachate Generated from Thermally Treated Sludge |
| title_full_unstemmed | Fenton Oxidation Combined with Iron–Carbon Micro-Electrolysis for Treating Leachate Generated from Thermally Treated Sludge |
| title_short | Fenton Oxidation Combined with Iron–Carbon Micro-Electrolysis for Treating Leachate Generated from Thermally Treated Sludge |
| title_sort | fenton oxidation combined with iron carbon micro electrolysis for treating leachate generated from thermally treated sludge |
| topic | sludge leachate iron–carbon micro-electrolysis Fenton oxidation wastewater treatment |
| url | https://www.mdpi.com/2297-8739/10/11/568 |
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