Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium

Influencing Factors and Immobilization Effects

Dados Bibliográficos

ID15511407
AutoresHanyue Wang (0000-0002-0695-9218, Xi'an University of Architecture and Technology), Tong Wang (0000-0002-9483-0050, Xi'an University of Architecture and Technology), Shangye Yang (0000-0002-8449-505X, Xi'an University of Architecture and Technology), Xueqing Liu (0000-0002-2489-5537, Xi'an University of Architecture and Technology), Liqing Kou (Xi'an University of Architecture and Technology), Tinglin Huang (0000-0002-8345-7772, Xi'an University of Architecture and Technology, autor correspondente), Gang Wen (0000-0003-1316-8788, Xi'an University of Architecture and Technology, autor correspondente)
Ano2019
Volume16
Fascículo4
Páginas583-583
Data de publicação2019-02-17
Peer ReviewedSim
Open AccessSim
TipoARTICLE
PeriódicoInternational Journal of Environmental Research and Public Health (JOURNAL)
Identificadores do periódicoISSN: 1661-7827 • E-ISSN: 1660-4601
EditoraMultidisciplinary Digital Publishing Institute (PUBLISHER • CH)
DOI10.3390/ijerph16040583
PMID30781590
OpenAlexW2914797817
IdiomaEN
Citações recebidas1
Referências citadas33

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 (NO3 - -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. NO3 - -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

Aerobic denitrification · Biology · Carbon source · Denitrification · Denitrifying bacteria · Eutrophication · Nitrate · Nitrogen · Nutrient · Phosphorus · Total organic carbon · Water quality · Chemistry · Constructed Wetlands for Wastewater Treatment · Environmental Science · Wastewater Treatment and Nitrogen Removal · Water Treatment and Disinfection · Ecology · Environmental Chemistry · Environmental Engineering