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Sponge iron enriches autotrophic/aerobic denitrifying bacteria to enhance denitrification in sequencing batch reactor.
Li, Wenxuan; Chen, Xinjuan; Yang, Tianxue; Zhu, Hongjuan; He, Zihan; Zhao, Ruifeng; Chen, Yongfan.
Afiliación
  • Li W; State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beij
  • Chen X; Department of Architecture and Materials Technology, Xinjiang Industry Technical College, Urumqi 830021, China.
  • Yang T; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address: yangtianxue17@163.com.
  • Zhu H; College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
  • He Z; College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
  • Zhao R; Jiuquan Iron & Steel (Group) Co., Ltd, Jiayuguan 735100, China.
  • Chen Y; College of Resources and Environmental Sciences, China Agricultural University, Beijing 100083, China.
Bioresour Technol ; 407: 131097, 2024 Sep.
Article en En | MEDLINE | ID: mdl-38986882
ABSTRACT
Sponge iron (SFe) coupled with a sludge system has great potential for improving biological denitrification; however, the underlying mechanism is not yet fully understood. In this study, the denitrification performance and microbial characteristics of ordinary sludge and SFe-sludge systems were investigated. Overall, the SFe-sludge reactor had faster ammonium degradation rate (94.0 %) and less nitrate accumulation (1.5-53.3 times lower) than ordinary reactor during the complete operation cycle of sequencing batch reactors. The addition of SFe increased the activities of nitrate and nitrite reductases. The total relative abundance of autotrophic denitrifying bacteria (Acidovorax, Arenimonas, etc.) in the SFe-sludge system after 38 days of operation was found to be 10.6 % higher than that in the ordinary sludge reactor. The aerobic denitrifying bacteria (Dokdonella, Phaeodactylibacter, etc.) was 5.3 % higher than ordinary sludge. The SFe-sludge system improved denitrification by enriching autotrophic/aerobic denitrifying bacteria in low carbon-to-nitrogen ratio wastewater treatment.
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Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Aguas del Alcantarillado / Reactores Biológicos / Procesos Autotróficos / Desnitrificación / Hierro Idioma: En Revista: Bioresour Technol Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Aguas del Alcantarillado / Reactores Biológicos / Procesos Autotróficos / Desnitrificación / Hierro Idioma: En Revista: Bioresour Technol Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article