Enhanced Wet Oxidation of Excess Sludge from Pharmaceutical Wastewater Treatment by NaOH
In the present study, enhanced wet oxidation of excess sludge from pharmaceutical wastewater by NaOH as an alkaline homogeneous catalyst was investigated. The experiments were carried out in a stainless-steel batch autoclave reactor. The highest volatile suspended solids (VSS) removal rate, 95.2%, w...
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| Format: | Article |
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MDPI AG
2023-07-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/13/7/1070 |
| _version_ | 1797589926853738496 |
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| author | Yuting Zhu Xu Zeng Kaiyu Fang |
| author_facet | Yuting Zhu Xu Zeng Kaiyu Fang |
| author_sort | Yuting Zhu |
| collection | DOAJ |
| description | In the present study, enhanced wet oxidation of excess sludge from pharmaceutical wastewater by NaOH as an alkaline homogeneous catalyst was investigated. The experiments were carried out in a stainless-steel batch autoclave reactor. The highest volatile suspended solids (VSS) removal rate, 95.2%, was achieved at 260 °C within 60 min with an initial oxygen pressure of 1.0 MPa and NaOH 0.5 g·L<sup>−1</sup>. Simultaneously, the chemical oxygen demand (COD) removal rate of 57.3% was reached. The increase in volatile fatty acids (VFAs) demonstrated that the degradation of sludge was greatly accelerated by NaOH. Interestingly, the production of acetic acid, an intermediate by-product generated from the oxidation of organic compounds, increased significantly. These results illustrated that NaOH is a promising catalyst for the utilization of wet oxidation liquid of excess sludge as a carbon source for the treatment of wastewater. |
| first_indexed | 2024-03-11T01:13:04Z |
| format | Article |
| id | doaj.art-d808e4e120b54bf2a63efeae688ecd02 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-11T01:13:04Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-d808e4e120b54bf2a63efeae688ecd022023-11-18T18:44:16ZengMDPI AGCatalysts2073-43442023-07-01137107010.3390/catal13071070Enhanced Wet Oxidation of Excess Sludge from Pharmaceutical Wastewater Treatment by NaOHYuting Zhu0Xu Zeng1Kaiyu Fang2State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaIn the present study, enhanced wet oxidation of excess sludge from pharmaceutical wastewater by NaOH as an alkaline homogeneous catalyst was investigated. The experiments were carried out in a stainless-steel batch autoclave reactor. The highest volatile suspended solids (VSS) removal rate, 95.2%, was achieved at 260 °C within 60 min with an initial oxygen pressure of 1.0 MPa and NaOH 0.5 g·L<sup>−1</sup>. Simultaneously, the chemical oxygen demand (COD) removal rate of 57.3% was reached. The increase in volatile fatty acids (VFAs) demonstrated that the degradation of sludge was greatly accelerated by NaOH. Interestingly, the production of acetic acid, an intermediate by-product generated from the oxidation of organic compounds, increased significantly. These results illustrated that NaOH is a promising catalyst for the utilization of wet oxidation liquid of excess sludge as a carbon source for the treatment of wastewater.https://www.mdpi.com/2073-4344/13/7/1070wet oxidationcatalystsodium hydroxidepharmaceutical wastewater |
| spellingShingle | Yuting Zhu Xu Zeng Kaiyu Fang Enhanced Wet Oxidation of Excess Sludge from Pharmaceutical Wastewater Treatment by NaOH Catalysts wet oxidation catalyst sodium hydroxide pharmaceutical wastewater |
| title | Enhanced Wet Oxidation of Excess Sludge from Pharmaceutical Wastewater Treatment by NaOH |
| title_full | Enhanced Wet Oxidation of Excess Sludge from Pharmaceutical Wastewater Treatment by NaOH |
| title_fullStr | Enhanced Wet Oxidation of Excess Sludge from Pharmaceutical Wastewater Treatment by NaOH |
| title_full_unstemmed | Enhanced Wet Oxidation of Excess Sludge from Pharmaceutical Wastewater Treatment by NaOH |
| title_short | Enhanced Wet Oxidation of Excess Sludge from Pharmaceutical Wastewater Treatment by NaOH |
| title_sort | enhanced wet oxidation of excess sludge from pharmaceutical wastewater treatment by naoh |
| topic | wet oxidation catalyst sodium hydroxide pharmaceutical wastewater |
| url | https://www.mdpi.com/2073-4344/13/7/1070 |
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