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Performance, kinetic characteristics and bacterial community of short-cut nitrification and denitrification system at different ferrous ion conditions.
- Source :
- Biodegradation; Aug2024, Vol. 35 Issue 5, p621-639, 19p
- Publication Year :
- 2024
-
Abstract
- In order to explore the operation performance, kinetic characteristics and bacterial community of the short-cut nitrification and denitrification (SND) system, the SND system with pre-cultured short cut nitrification and denitrification sludge was established and operated under different ferrous ion (Fe (II)) conditions. Experimental results showed that the average NH<subscript>4</subscript><superscript>+</superscript>–N removal efficiency (ARE) of SND system was 97.3% on Day 5 and maintained a high level of 94.9% ± 1.3% for a long operation period. When the influent Fe(II) concentration increased from 2.3 to 7.3 mg L<superscript>−1</superscript>, the sedimentation performance, sludge concentration and organic matter removal performance were improved. However, higher Fe(II) of 12.3 mg L<superscript>−1</superscript> decreased the removal of nitrogen and COD<subscript>Cr</subscript> with the relative abundance (RA) of Proteobacteria and Bacteroidetes decreased to 30.28% and 19.41%, respectively. Proteobacteria, Bacteroidetes and Firmicutes were the dominant phyla in SND system. Higher Fe(II) level of 12.3 mg L<superscript>−1</superscript> increase the RA of denitrifying genus Trichococcus (33.93%), and the denitrifying genus Thauera and Tolumonas dominant at Fe(II) level of no more than 7.3 mg L<superscript>−1</superscript>. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09239820
- Volume :
- 35
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Biodegradation
- Publication Type :
- Academic Journal
- Accession number :
- 178417265
- Full Text :
- https://doi.org/10.1007/s10532-024-10080-7