Treatment of Organic and Sulfate/Sulfide Contaminated Wastewater and Bioelectricity Generation by Sulfate-Reducing Bioreactor Coupling with Sulfide-Oxidizing Fuel Cell
A wastewater treatment system has been established based on sulfate-reducing and sulfide—oxidizing processes for treating organic wastewater containing high sulfate/sulfide. The influence of COD/SO<sub>4</sub><sup>2−</sup> ratio and hydraulic retention time (HRT) on removal e...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/17/6197 |
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| author | Thi Quynh Hoa Kieu Thi Yen Nguyen Chi Linh Do |
| author_facet | Thi Quynh Hoa Kieu Thi Yen Nguyen Chi Linh Do |
| author_sort | Thi Quynh Hoa Kieu |
| collection | DOAJ |
| description | A wastewater treatment system has been established based on sulfate-reducing and sulfide—oxidizing processes for treating organic wastewater containing high sulfate/sulfide. The influence of COD/SO<sub>4</sub><sup>2−</sup> ratio and hydraulic retention time (HRT) on removal efficiencies of sulfate, COD, sulfide and electricity generation was investigated. The continuous operation of the treatment system was carried out for 63 days with the optimum COD/SO<sub>4</sub><sup>2−</sup> ratio and HRT. The result showed that the COD and sulfate removal efficiencies were stable, reaching 94.8 ± 0.6 and 93.0 ± 1.3% during the operation. A power density level of 18.0 ± 1.6 mW/m<sup>2</sup> was obtained with a sulfide removal efficiency of 93.0 ± 1.2%. However, the sulfide removal efficiency and power density decreased gradually after 45 days. The results from scanning electron microscopy (SEM) with an energy dispersive X-ray (EDX) show that sulfur accumulated on the anode, which could explain the decline in sulfide oxidation and electricity generation. This study provides a promising treatment system to scale up for its actual applications in this type of wastewater. |
| first_indexed | 2024-03-10T23:17:29Z |
| format | Article |
| id | doaj.art-8358e069345b4bb8b24bbf362044160a |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T23:17:29Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-8358e069345b4bb8b24bbf362044160a2023-11-19T08:32:39ZengMDPI AGMolecules1420-30492023-08-012817619710.3390/molecules28176197Treatment of Organic and Sulfate/Sulfide Contaminated Wastewater and Bioelectricity Generation by Sulfate-Reducing Bioreactor Coupling with Sulfide-Oxidizing Fuel CellThi Quynh Hoa Kieu0Thi Yen Nguyen1Chi Linh Do2Institute of Biotechnology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, VietnamInstitute of Biotechnology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, VietnamInstitute of Material Sciences, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, VietnamA wastewater treatment system has been established based on sulfate-reducing and sulfide—oxidizing processes for treating organic wastewater containing high sulfate/sulfide. The influence of COD/SO<sub>4</sub><sup>2−</sup> ratio and hydraulic retention time (HRT) on removal efficiencies of sulfate, COD, sulfide and electricity generation was investigated. The continuous operation of the treatment system was carried out for 63 days with the optimum COD/SO<sub>4</sub><sup>2−</sup> ratio and HRT. The result showed that the COD and sulfate removal efficiencies were stable, reaching 94.8 ± 0.6 and 93.0 ± 1.3% during the operation. A power density level of 18.0 ± 1.6 mW/m<sup>2</sup> was obtained with a sulfide removal efficiency of 93.0 ± 1.2%. However, the sulfide removal efficiency and power density decreased gradually after 45 days. The results from scanning electron microscopy (SEM) with an energy dispersive X-ray (EDX) show that sulfur accumulated on the anode, which could explain the decline in sulfide oxidation and electricity generation. This study provides a promising treatment system to scale up for its actual applications in this type of wastewater.https://www.mdpi.com/1420-3049/28/17/6197electricity generationsulfate-reducing bacteria (SRB)microbial fuel cellsulfate reductionsulfide oxidization |
| spellingShingle | Thi Quynh Hoa Kieu Thi Yen Nguyen Chi Linh Do Treatment of Organic and Sulfate/Sulfide Contaminated Wastewater and Bioelectricity Generation by Sulfate-Reducing Bioreactor Coupling with Sulfide-Oxidizing Fuel Cell Molecules electricity generation sulfate-reducing bacteria (SRB) microbial fuel cell sulfate reduction sulfide oxidization |
| title | Treatment of Organic and Sulfate/Sulfide Contaminated Wastewater and Bioelectricity Generation by Sulfate-Reducing Bioreactor Coupling with Sulfide-Oxidizing Fuel Cell |
| title_full | Treatment of Organic and Sulfate/Sulfide Contaminated Wastewater and Bioelectricity Generation by Sulfate-Reducing Bioreactor Coupling with Sulfide-Oxidizing Fuel Cell |
| title_fullStr | Treatment of Organic and Sulfate/Sulfide Contaminated Wastewater and Bioelectricity Generation by Sulfate-Reducing Bioreactor Coupling with Sulfide-Oxidizing Fuel Cell |
| title_full_unstemmed | Treatment of Organic and Sulfate/Sulfide Contaminated Wastewater and Bioelectricity Generation by Sulfate-Reducing Bioreactor Coupling with Sulfide-Oxidizing Fuel Cell |
| title_short | Treatment of Organic and Sulfate/Sulfide Contaminated Wastewater and Bioelectricity Generation by Sulfate-Reducing Bioreactor Coupling with Sulfide-Oxidizing Fuel Cell |
| title_sort | treatment of organic and sulfate sulfide contaminated wastewater and bioelectricity generation by sulfate reducing bioreactor coupling with sulfide oxidizing fuel cell |
| topic | electricity generation sulfate-reducing bacteria (SRB) microbial fuel cell sulfate reduction sulfide oxidization |
| url | https://www.mdpi.com/1420-3049/28/17/6197 |
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