Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium: Influencing Factors and Immobilization Effects
Nitrogen pollution in reservoirs has received increasing attention in recent years. Although a number of aerobic denitrifying strains have been isolated to remove nitrogen from eutrophic waters, the situation in oligotrophic water environments has not received significant attention. In this study, a...
Main Authors: | , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2019-02-01
|
Series: | International Journal of Environmental Research and Public Health |
Subjects: | |
Online Access: | https://www.mdpi.com/1660-4601/16/4/583 |
id |
doaj-39961a594d2b41c5aafa6ab13d9a913a |
---|---|
record_format |
Article |
spelling |
doaj-39961a594d2b41c5aafa6ab13d9a913a2020-11-24T20:48:14ZengMDPI AGInternational Journal of Environmental Research and Public Health1660-46012019-02-0116458310.3390/ijerph16040583ijerph16040583Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium: Influencing Factors and Immobilization EffectsHanyue Wang0Tong Wang1Shangye Yang2Xueqing Liu3Liqing Kou4Tinglin Huang5Gang Wen6Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaKey Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaKey Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaKey Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaKey Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaKey Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaKey Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaNitrogen pollution in reservoirs has received increasing attention in recent years. Although a number of aerobic denitrifying strains have been isolated to remove nitrogen from eutrophic waters, the situation in oligotrophic water environments has not received significant attention. In this study, a mixed aerobic denitrifying consortium screened from reservoir samples was used to remove nitrogen in an oligotrophic denitrification medium and actual oligotrophic source water. The results showed that the consortium removed 75.32% of nitrate (NO<sub>3</sub><sup>−</sup>-N) and 63.11% of the total nitrogen (TN) in oligotrophic reservoir water during a 24-h aerobic cultivation. More initial carbon source was helpful for simultaneous removal of carbon and nitrogen in the reservoir source water. NO<sub>3</sub><sup>−</sup>-N and TN were still reduced by 60.93% and 46.56% at a lower temperature (10 °C), respectively, though the rates were reduced. Moreover, adding phosphorus promoted bacterial growth and increased TN removal efficiency by around 20%. The performance of the immobilized consortium in source water was also explored. After 6 days of immobilization, approximately 25% of TN in the source water could be removed by the carriers, and the effects could last for at least 9 cycles of reuse. These results provide a good reference for the use of aerobic denitrifiers in oligotrophic reservoirs.https://www.mdpi.com/1660-4601/16/4/583Nitrogen pollutionaerobic denitrificationoligotrophicsource waterimmobilization |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hanyue Wang Tong Wang Shangye Yang Xueqing Liu Liqing Kou Tinglin Huang Gang Wen |
spellingShingle |
Hanyue Wang Tong Wang Shangye Yang Xueqing Liu Liqing Kou Tinglin Huang Gang Wen Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium: Influencing Factors and Immobilization Effects International Journal of Environmental Research and Public Health Nitrogen pollution aerobic denitrification oligotrophic source water immobilization |
author_facet |
Hanyue Wang Tong Wang Shangye Yang Xueqing Liu Liqing Kou Tinglin Huang Gang Wen |
author_sort |
Hanyue Wang |
title |
Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium: Influencing Factors and Immobilization Effects |
title_short |
Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium: Influencing Factors and Immobilization Effects |
title_full |
Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium: Influencing Factors and Immobilization Effects |
title_fullStr |
Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium: Influencing Factors and Immobilization Effects |
title_full_unstemmed |
Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium: Influencing Factors and Immobilization Effects |
title_sort |
nitrogen removal in oligotrophic reservoir water by a mixed aerobic denitrifying consortium: influencing factors and immobilization effects |
publisher |
MDPI AG |
series |
International Journal of Environmental Research and Public Health |
issn |
1660-4601 |
publishDate |
2019-02-01 |
description |
Nitrogen pollution in reservoirs has received increasing attention in recent years. Although a number of aerobic denitrifying strains have been isolated to remove nitrogen from eutrophic waters, the situation in oligotrophic water environments has not received significant attention. In this study, a mixed aerobic denitrifying consortium screened from reservoir samples was used to remove nitrogen in an oligotrophic denitrification medium and actual oligotrophic source water. The results showed that the consortium removed 75.32% of nitrate (NO<sub>3</sub><sup>−</sup>-N) and 63.11% of the total nitrogen (TN) in oligotrophic reservoir water during a 24-h aerobic cultivation. More initial carbon source was helpful for simultaneous removal of carbon and nitrogen in the reservoir source water. NO<sub>3</sub><sup>−</sup>-N and TN were still reduced by 60.93% and 46.56% at a lower temperature (10 °C), respectively, though the rates were reduced. Moreover, adding phosphorus promoted bacterial growth and increased TN removal efficiency by around 20%. The performance of the immobilized consortium in source water was also explored. After 6 days of immobilization, approximately 25% of TN in the source water could be removed by the carriers, and the effects could last for at least 9 cycles of reuse. These results provide a good reference for the use of aerobic denitrifiers in oligotrophic reservoirs. |
topic |
Nitrogen pollution aerobic denitrification oligotrophic source water immobilization |
url |
https://www.mdpi.com/1660-4601/16/4/583 |
work_keys_str_mv |
AT hanyuewang nitrogenremovalinoligotrophicreservoirwaterbyamixedaerobicdenitrifyingconsortiuminfluencingfactorsandimmobilizationeffects AT tongwang nitrogenremovalinoligotrophicreservoirwaterbyamixedaerobicdenitrifyingconsortiuminfluencingfactorsandimmobilizationeffects AT shangyeyang nitrogenremovalinoligotrophicreservoirwaterbyamixedaerobicdenitrifyingconsortiuminfluencingfactorsandimmobilizationeffects AT xueqingliu nitrogenremovalinoligotrophicreservoirwaterbyamixedaerobicdenitrifyingconsortiuminfluencingfactorsandimmobilizationeffects AT liqingkou nitrogenremovalinoligotrophicreservoirwaterbyamixedaerobicdenitrifyingconsortiuminfluencingfactorsandimmobilizationeffects AT tinglinhuang nitrogenremovalinoligotrophicreservoirwaterbyamixedaerobicdenitrifyingconsortiuminfluencingfactorsandimmobilizationeffects AT gangwen nitrogenremovalinoligotrophicreservoirwaterbyamixedaerobicdenitrifyingconsortiuminfluencingfactorsandimmobilizationeffects |
_version_ |
1716808559984902144 |