High-rate biological denitrification in the cyclic rotating-bed biological reactor: Effect of COD=NO 3 , nitrate concentration and salinity and the phylogenetic analysis of denitrifiers

The effects of COD=NO 3 ratio, nitrate concentration and salinity was tested on the performance of the CRBR in denitrification with catechol as carbon source. The maximum nitrate reduction attained atCOD=NO 3 ratio of 1. The CRBR operated at optimum COD=NO3 ratio could completely denitrify the nitrate at inlet concentration up to 1250 mg/L without nitrite accumulation. The maximum denitrifica tion rate in the CRBR was 3:56 kgNO 3 =m3 d with a nitrate reduction efficiency of 99% when the bioreactor was operated at inlet nitrate loading rate of 3:6 kgNO 3 =m3 d. The denitrification performance of the CRBR was not affected significantly by NaCl concentrations up to 20 g/L. 16S rRNA fragment and phylogenetic analysis identified Pseudomonas resinovorans, Stenotrophomonas maltophilia and Bacillus cereus as the most abundant denitrifiers in biomass. Accordingly, the CRBR is a high-rate bioreactor and appropriate technology for treatment of nitrate-laden industrial wastewaters containing phenolic compounds and salinity.

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Moussavi G. Javad Jafari S. y Yaghmaeian K. High-rate biological denitrification in the cyclic rotating-bed biological reactor: Effect of COD=NO 3 nitrate concentration and salinity and the phylogenetic analysis of denitrifiers. Elsevier B.V., 2015. https://doi.org/10.1016/j.biortech.2015.08.047

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Resource type Article
Date of creation 2024-11-05
Date of last revision 2025-02-01
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Metadata identifier 3d7510bd-6255-5672-b3c7-9388c37e0f19
Metadata language Spanish
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High-value dataset category Earth observation and environment
ISO 19115 topic category biota
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Name of the dataset creator Moussavi, G., Javad Jafari, S. y Yaghmaeian, K.
Name of the dataset editor Elsevier B.V.
Other identifier DOI: 10.1016/j.biortech.2015.08.047
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