Removal of Nitrate Nitrogen by Rhodotorula graminis Immobilized in Alginate Gel for Groundwater Treatment
Groundwater is the source of all tap water in Kumamoto City, Japan. However, the concentration of nitrate nitrogen (NO3−-N) tends to increase every year due to the influences of overfertilization, field disposal of livestock manure, and inflow of domestic wastewater. A heterotrophic nitrification–ae...
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| Veröffentlicht in: | Processes 2021-09, Vol.9 (9), p.1657 |
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| creator | Nishida, Masashi Matsuo, Syuhei Yamanari, Karin Iwahara, Masayoshi Kusakabe, Katsuki |
| description | Groundwater is the source of all tap water in Kumamoto City, Japan. However, the concentration of nitrate nitrogen (NO3−-N) tends to increase every year due to the influences of overfertilization, field disposal of livestock manure, and inflow of domestic wastewater. A heterotrophic nitrification–aerobic denitrification (HN-AD) system is an attractive approach for nitrate-nitrogen removal. In this study, Rhodotorula graminis NBRC0190, a naturally occurring red yeast that shows high nitrogen removal performance in glucose, was immobilized on calcium alginate hydrogel beads. NO3−-N removal efficiency exceeded 98% in the region of NO3−-N concentration below 10 mg/L in the model groundwater. Even after the same treatment was repeated five times, the denitrification performance of the R. gra immobilized alginate hydrogel beads was maintained. Finally, when this treatment method was applied to actual groundwater in Kumamoto City, it was possible to make the water of even higher quality. |
| doi_str_mv | 10.3390/pr9091657 |
| format | Article |
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However, the concentration of nitrate nitrogen (NO3−-N) tends to increase every year due to the influences of overfertilization, field disposal of livestock manure, and inflow of domestic wastewater. A heterotrophic nitrification–aerobic denitrification (HN-AD) system is an attractive approach for nitrate-nitrogen removal. In this study, Rhodotorula graminis NBRC0190, a naturally occurring red yeast that shows high nitrogen removal performance in glucose, was immobilized on calcium alginate hydrogel beads. NO3−-N removal efficiency exceeded 98% in the region of NO3−-N concentration below 10 mg/L in the model groundwater. Even after the same treatment was repeated five times, the denitrification performance of the R. gra immobilized alginate hydrogel beads was maintained. Finally, when this treatment method was applied to actual groundwater in Kumamoto City, it was possible to make the water of even higher quality.</description><identifier>ISSN: 2227-9717</identifier><identifier>EISSN: 2227-9717</identifier><identifier>DOI: 10.3390/pr9091657</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Alginic acid ; Beads ; Calcium alginate ; Carbon ; Chromatography ; Denitrification ; Drinking water ; Experiments ; Glucose ; Groundwater ; Groundwater treatment ; Hydrogels ; Livestock ; Nitrate removal ; Nitrates ; Nitrification ; Nitrogen ; Nitrogen removal ; Rhodotorula graminis ; Sodium ; Wastewater</subject><ispartof>Processes, 2021-09, Vol.9 (9), p.1657</ispartof><rights>2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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Finally, when this treatment method was applied to actual groundwater in Kumamoto City, it was possible to make the water of even higher quality.</description><subject>Alginic acid</subject><subject>Beads</subject><subject>Calcium alginate</subject><subject>Carbon</subject><subject>Chromatography</subject><subject>Denitrification</subject><subject>Drinking water</subject><subject>Experiments</subject><subject>Glucose</subject><subject>Groundwater</subject><subject>Groundwater treatment</subject><subject>Hydrogels</subject><subject>Livestock</subject><subject>Nitrate removal</subject><subject>Nitrates</subject><subject>Nitrification</subject><subject>Nitrogen</subject><subject>Nitrogen removal</subject><subject>Rhodotorula graminis</subject><subject>Sodium</subject><subject>Wastewater</subject><issn>2227-9717</issn><issn>2227-9717</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNpNkFFLwzAUhYMoOOYe_AcBn3yoJk2TNI9jaB0MhTGfS9KkM6NNZpIq89fbORHvy7l8nHsPHACuMbojRKD7fRBIYEb5GZjkec4zwTE__7dfglmMOzSOwKSkbALs2vT-Q3bQt_DZpiCT-VG_NQ6qA1y_ee2TD0Mn4TbI3job4bLvvbKd_TIaWgfn3da642FlOtj6AKvgB6c_RxTgJhiZeuPSFbhoZRfN7Fen4PXxYbN4ylYv1XIxX2UNoWXKmNSFUrmSimGiWtZSWZRCGIQ5RbrQmigzkkIYTUtpGiWkpILwERWoYZRMwc3p7z7498HEVO_8ENwYWeeUswLlDLHRdXtyNcHHGExb74PtZTjUGNXHMuu_Msk3B1xoLw</recordid><startdate>20210914</startdate><enddate>20210914</enddate><creator>Nishida, Masashi</creator><creator>Matsuo, Syuhei</creator><creator>Yamanari, Karin</creator><creator>Iwahara, Masayoshi</creator><creator>Kusakabe, Katsuki</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>LK8</scope><scope>M7P</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20210914</creationdate><title>Removal of Nitrate Nitrogen by Rhodotorula graminis Immobilized in Alginate Gel for Groundwater Treatment</title><author>Nishida, Masashi ; 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However, the concentration of nitrate nitrogen (NO3−-N) tends to increase every year due to the influences of overfertilization, field disposal of livestock manure, and inflow of domestic wastewater. A heterotrophic nitrification–aerobic denitrification (HN-AD) system is an attractive approach for nitrate-nitrogen removal. In this study, Rhodotorula graminis NBRC0190, a naturally occurring red yeast that shows high nitrogen removal performance in glucose, was immobilized on calcium alginate hydrogel beads. NO3−-N removal efficiency exceeded 98% in the region of NO3−-N concentration below 10 mg/L in the model groundwater. Even after the same treatment was repeated five times, the denitrification performance of the R. gra immobilized alginate hydrogel beads was maintained. Finally, when this treatment method was applied to actual groundwater in Kumamoto City, it was possible to make the water of even higher quality.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/pr9091657</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Alginic acid Beads Calcium alginate Carbon Chromatography Denitrification Drinking water Experiments Glucose Groundwater Groundwater treatment Hydrogels Livestock Nitrate removal Nitrates Nitrification Nitrogen Nitrogen removal Rhodotorula graminis Sodium Wastewater |
| title | Removal of Nitrate Nitrogen by Rhodotorula graminis Immobilized in Alginate Gel for Groundwater Treatment |
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