Effect of Electrostatic Field Strength on Bioelectrochemical Nitrogen Removal from Nitrogen-Rich Wastewater
The effect of electrostatic fields on the bioelectrochemical removal of ammonium and nitrite from nitrogen-rich wastewater was investigated at strengths ranging from 0.2 to 0.67 V/cm in bioelectrochemical anaerobic batch reactors. The electrostatic field enriched the bulk solution with electroactive...
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| author | Anna Joicy Young-Chae Song Jun Li Sang-Eun Oh Seong-Ho Jang Yongtae Ahn |
| author_facet | Anna Joicy Young-Chae Song Jun Li Sang-Eun Oh Seong-Ho Jang Yongtae Ahn |
| author_sort | Anna Joicy |
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| description | The effect of electrostatic fields on the bioelectrochemical removal of ammonium and nitrite from nitrogen-rich wastewater was investigated at strengths ranging from 0.2 to 0.67 V/cm in bioelectrochemical anaerobic batch reactors. The electrostatic field enriched the bulk solution with electroactive bacteria, including ammonium oxidizing exoelectrogens (AOE) and denitritating electrotrophs (DNE). The electroactive bacteria removed ammonium and nitrite simultaneously with alkalinity consumption through biological direct interspecies electron transfer (DIET) in the bulk solution. However, the total nitrogen (ammonium and nitrite) removal rate increased from 106.1 to 166.3 mg N/g volatile suspended solids (VSS).d as the electrostatic field strength increased from 0.2 to 0.67 V/cm. In the cyclic voltammogram, the redox peaks corresponding to the activities of AOE and DNE increased as the strength of the electrostatic field increased. Based on the microbial taxonomic profiling, the dominant genera involved in the bioelectrochemical nitrogen removal were identified as <i>Pseudomonas</i>, <i>Petrimonas</i>, <i>DQ677001_g</i>, <i>Thiopseudomonas</i>, <i>Lentimicrobium</i>, and <i>Porphyromonadaceae_uc</i>. This suggests that the electrostatic field of 0.67 V/cm significantly improves the bioelectrochemical nitrogen removal by enriching the bulk solution with AOE and DNE and promoting the biological DIET between them. |
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| format | Article |
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| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T18:58:58Z |
| publishDate | 2020-06-01 |
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| series | Energies |
| spelling | doaj.art-1a8a09cd7f0c41c3b26adbe7ebb75a882023-11-20T04:30:40ZengMDPI AGEnergies1996-10732020-06-011312321810.3390/en13123218Effect of Electrostatic Field Strength on Bioelectrochemical Nitrogen Removal from Nitrogen-Rich WastewaterAnna Joicy0Young-Chae Song1Jun Li2Sang-Eun Oh3Seong-Ho Jang4Yongtae Ahn5Department of Energy Engineering, Gyeongnam National University of Science and Technology, Jinju, Gyeongnam, Jinju 52725, KoreaDepartment of Environmental Engineering, Korea Maritime and Ocean University, Busan 49112, KoreaKey Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400030, ChinaDepartment of Biological Environment, Kangwon National University, Kangwon 24341, KoreaDepartment of Bio-Environmental Energy, Pusan National University, Miryang 50463, KoreaDepartment of Energy Engineering, Gyeongnam National University of Science and Technology, Jinju, Gyeongnam, Jinju 52725, KoreaThe effect of electrostatic fields on the bioelectrochemical removal of ammonium and nitrite from nitrogen-rich wastewater was investigated at strengths ranging from 0.2 to 0.67 V/cm in bioelectrochemical anaerobic batch reactors. The electrostatic field enriched the bulk solution with electroactive bacteria, including ammonium oxidizing exoelectrogens (AOE) and denitritating electrotrophs (DNE). The electroactive bacteria removed ammonium and nitrite simultaneously with alkalinity consumption through biological direct interspecies electron transfer (DIET) in the bulk solution. However, the total nitrogen (ammonium and nitrite) removal rate increased from 106.1 to 166.3 mg N/g volatile suspended solids (VSS).d as the electrostatic field strength increased from 0.2 to 0.67 V/cm. In the cyclic voltammogram, the redox peaks corresponding to the activities of AOE and DNE increased as the strength of the electrostatic field increased. Based on the microbial taxonomic profiling, the dominant genera involved in the bioelectrochemical nitrogen removal were identified as <i>Pseudomonas</i>, <i>Petrimonas</i>, <i>DQ677001_g</i>, <i>Thiopseudomonas</i>, <i>Lentimicrobium</i>, and <i>Porphyromonadaceae_uc</i>. This suggests that the electrostatic field of 0.67 V/cm significantly improves the bioelectrochemical nitrogen removal by enriching the bulk solution with AOE and DNE and promoting the biological DIET between them.https://www.mdpi.com/1996-1073/13/12/3218bioelectrochemicalnitrogen removalelectrostatic fielddirect interspecies electron transferelectroactive bacteria |
| spellingShingle | Anna Joicy Young-Chae Song Jun Li Sang-Eun Oh Seong-Ho Jang Yongtae Ahn Effect of Electrostatic Field Strength on Bioelectrochemical Nitrogen Removal from Nitrogen-Rich Wastewater Energies bioelectrochemical nitrogen removal electrostatic field direct interspecies electron transfer electroactive bacteria |
| title | Effect of Electrostatic Field Strength on Bioelectrochemical Nitrogen Removal from Nitrogen-Rich Wastewater |
| title_full | Effect of Electrostatic Field Strength on Bioelectrochemical Nitrogen Removal from Nitrogen-Rich Wastewater |
| title_fullStr | Effect of Electrostatic Field Strength on Bioelectrochemical Nitrogen Removal from Nitrogen-Rich Wastewater |
| title_full_unstemmed | Effect of Electrostatic Field Strength on Bioelectrochemical Nitrogen Removal from Nitrogen-Rich Wastewater |
| title_short | Effect of Electrostatic Field Strength on Bioelectrochemical Nitrogen Removal from Nitrogen-Rich Wastewater |
| title_sort | effect of electrostatic field strength on bioelectrochemical nitrogen removal from nitrogen rich wastewater |
| topic | bioelectrochemical nitrogen removal electrostatic field direct interspecies electron transfer electroactive bacteria |
| url | https://www.mdpi.com/1996-1073/13/12/3218 |
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