Electricity Generation, Salt and Nitrogen Removal and Microbial Community in Aircathode Microbial Desalination Cell for Saline-Alkaline Soil-Washing Water Treatment
An aircathode microbial desalination cell (AMDC) was successfully started by inoculating anaerobic sludge into the anode of a microbial desalination cell and then used to study the effects of salinity on performance of AMDC and effect of treatment of coastal saline-alkaline soil-washing water. The r...
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MDPI AG
2020-08-01
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| author | Chenglong Xu Jialei Lu Zhimiao Zhao Yinjiang Zhang Jiawei Zhang |
| author_facet | Chenglong Xu Jialei Lu Zhimiao Zhao Yinjiang Zhang Jiawei Zhang |
| author_sort | Chenglong Xu |
| collection | DOAJ |
| description | An aircathode microbial desalination cell (AMDC) was successfully started by inoculating anaerobic sludge into the anode of a microbial desalination cell and then used to study the effects of salinity on performance of AMDC and effect of treatment of coastal saline-alkaline soil-washing water. The results showed that the desalination cycle and rate gradually shorten, but salt removal gradually increased when the salinity was decreased, and the highest salt removal was 98.00 ± 0.12% at a salinity of 5 g/L. COD removal efficiency was increased with the extension of operation cycle and largest removal efficiency difference was not significant, but the average coulomb efficiency had significant differences under the condition of each salinity. This indicates that salinity conditions have significant influence on salt removal and coulomb efficiency under the combined action of osmotic pressure, electric field action, running time and microbial activity, etc. On the contrary, COD removal effect has no significant differences under the condition of inoculation of the same substrate in the anode chamber. The salt removal reached 99.13 ± 2.1% when the AMDC experiment ended under the condition of washing water of coastal saline-alkaline soil was inserted in the desalination chamber. Under the action of osmotic pressure, ion migration, nitrification and denitrification, NH<sub>4</sub><sup>+</sup>-N and NO<sub>3</sub><sup>−</sup>-N in the washing water of the desalination chamber were removed, and this indicates that the microbial desalination cell can be used to treatment the washing water of coastal saline-alkaline soil. The microbial community and function of the anode electrode biofilm and desalination chamber were analyzed through high-throughput sequencing, and the power generation characteristics, organics degradation and migration and transformation pathways of nitrogen of the aircathode microbial desalination cell were further explained. |
| first_indexed | 2024-03-10T17:35:16Z |
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| language | English |
| last_indexed | 2024-03-10T17:35:16Z |
| publishDate | 2020-08-01 |
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| series | Water |
| spelling | doaj.art-3058cda308bb4139b2aaeb6c12f46b2e2023-11-20T09:51:15ZengMDPI AGWater2073-44412020-08-01128225710.3390/w12082257Electricity Generation, Salt and Nitrogen Removal and Microbial Community in Aircathode Microbial Desalination Cell for Saline-Alkaline Soil-Washing Water TreatmentChenglong Xu0Jialei Lu1Zhimiao Zhao2Yinjiang Zhang3Jiawei Zhang4College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, ChinaCollege of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, ChinaCollege of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, ChinaCollege of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, ChinaCollege of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, ChinaAn aircathode microbial desalination cell (AMDC) was successfully started by inoculating anaerobic sludge into the anode of a microbial desalination cell and then used to study the effects of salinity on performance of AMDC and effect of treatment of coastal saline-alkaline soil-washing water. The results showed that the desalination cycle and rate gradually shorten, but salt removal gradually increased when the salinity was decreased, and the highest salt removal was 98.00 ± 0.12% at a salinity of 5 g/L. COD removal efficiency was increased with the extension of operation cycle and largest removal efficiency difference was not significant, but the average coulomb efficiency had significant differences under the condition of each salinity. This indicates that salinity conditions have significant influence on salt removal and coulomb efficiency under the combined action of osmotic pressure, electric field action, running time and microbial activity, etc. On the contrary, COD removal effect has no significant differences under the condition of inoculation of the same substrate in the anode chamber. The salt removal reached 99.13 ± 2.1% when the AMDC experiment ended under the condition of washing water of coastal saline-alkaline soil was inserted in the desalination chamber. Under the action of osmotic pressure, ion migration, nitrification and denitrification, NH<sub>4</sub><sup>+</sup>-N and NO<sub>3</sub><sup>−</sup>-N in the washing water of the desalination chamber were removed, and this indicates that the microbial desalination cell can be used to treatment the washing water of coastal saline-alkaline soil. The microbial community and function of the anode electrode biofilm and desalination chamber were analyzed through high-throughput sequencing, and the power generation characteristics, organics degradation and migration and transformation pathways of nitrogen of the aircathode microbial desalination cell were further explained.https://www.mdpi.com/2073-4441/12/8/2257aircathode microbial desalination cellcoastal saline-alkaline soil-washing watersalinitydesalinationpollutants removalmicrobial community |
| spellingShingle | Chenglong Xu Jialei Lu Zhimiao Zhao Yinjiang Zhang Jiawei Zhang Electricity Generation, Salt and Nitrogen Removal and Microbial Community in Aircathode Microbial Desalination Cell for Saline-Alkaline Soil-Washing Water Treatment Water aircathode microbial desalination cell coastal saline-alkaline soil-washing water salinity desalination pollutants removal microbial community |
| title | Electricity Generation, Salt and Nitrogen Removal and Microbial Community in Aircathode Microbial Desalination Cell for Saline-Alkaline Soil-Washing Water Treatment |
| title_full | Electricity Generation, Salt and Nitrogen Removal and Microbial Community in Aircathode Microbial Desalination Cell for Saline-Alkaline Soil-Washing Water Treatment |
| title_fullStr | Electricity Generation, Salt and Nitrogen Removal and Microbial Community in Aircathode Microbial Desalination Cell for Saline-Alkaline Soil-Washing Water Treatment |
| title_full_unstemmed | Electricity Generation, Salt and Nitrogen Removal and Microbial Community in Aircathode Microbial Desalination Cell for Saline-Alkaline Soil-Washing Water Treatment |
| title_short | Electricity Generation, Salt and Nitrogen Removal and Microbial Community in Aircathode Microbial Desalination Cell for Saline-Alkaline Soil-Washing Water Treatment |
| title_sort | electricity generation salt and nitrogen removal and microbial community in aircathode microbial desalination cell for saline alkaline soil washing water treatment |
| topic | aircathode microbial desalination cell coastal saline-alkaline soil-washing water salinity desalination pollutants removal microbial community |
| url | https://www.mdpi.com/2073-4441/12/8/2257 |
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