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- Title
Removal of high concentrations of NO3− from nuclear industrial wastewater by using a fixed-bed bioreactor.
- Authors
Su, Hao; Lei, Zhiwu; Hu, Eming; Wang, Hongqiang; Wang, Peiwen; Zhou, Wen; Wang, Qingliang
- Abstract
In this work, a down-flow fixed bed anaerobic biofilm reactor filled by biological ceramsites were prepared to remove the high concentration of NO3− (> 20 g/L) from nuclear industry wastewaters. The effects of hydraulic retention time, the concentration of NO3−, the molar ratio of C/N and temperature on the removal efficiencies of NO3− were investigated. The results showed that the removal rate of NO3− with the initial concentration of 6 g/L can reach 99% or more by controlling the hydraulic retention time at 0.75 h, the molar ratio of C/N at 1.5 and the temperature over 18 °C. In the process, the NO2− was not accumulated, and the autotrophic denitrifying bacteria grow well in anaerobic biofilm reactors, proving a usable method for removing the high concentration NO3− from nuclear industrial wastewaters.
- Subjects
SEWAGE; INDUSTRIAL wastes; ANAEROBIC reactors; AUTOTROPHIC bacteria; RF values (Chromatography); NUCLEAR industry
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2020, Vol 324, Issue 2, p803
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-020-07104-w