Optimization of Operation Performance and Bacterial Characteristics in SBR Processes for Short-cut Nitrification and Denitrification

Kun Yin, Min Wei, Guo-qiang Long, Ya-lei Liu, Guang-feng Yang

2022

Abstract

In order to explore the operation performance and bacterial characteristics in short-cut nitrification and denitrification (SND) processes, three laboratory scale sequencing batch reactors (SBRs) R1, R2 and R3 were established using activated sludge as seeding sludge. Experimental results showed that three SND systems could operate effectively and stably in sludge preculture stage with the average NH4 +-N removal efficiency of 88.6±1.7%, 93.5±1.2% and 91.4±1.5% in R1, R2 and R3, respectively. Changing the aeration mode from continuous aeration to intermittent aeration with intermittent time of 2h, the removal efficiency of NH4 +-N and total nitrogen (TN) were 66.3±2.4% and 85.3±1.4%, respectively. The nitrification performance was obviously inhibited, but intermittent aeration improved the TN removal performance. Decreasing aeration rate, the removal efficiency of NH4 +-N decreased to 54.3±2.1%, while the removal efficiency of TN increased by 73.0±2.8%. When the C/N ratio changed from 1.5:1 to 2:1, the removal efficiency of NH4 +-N and TN were 71.2±3.3% and 85.4±2.0%, respectively. In the SND-SBR system, Proteobacteria (47.0%), Bacteroidetes (25.9%), Actinobacteria (17.8%) were dominant at phylum level. At the same time, denitrification related genus Thauera with relative abundance of 10.6% was dominant in SND systems.

Paper Citation

in Harvard Style

Yin K., Wei M., Long G., Liu Y. and Yang G. (2022). Optimization of Operation Performance and Bacterial Characteristics in SBR Processes for Short-cut Nitrification and Denitrification. In Proceedings of the 4th International Conference on Biomedical Engineering and Bioinformatics - Volume 1: ICBEB, ISBN 978-989-758-595-1, pages 342-348. DOI: 10.5220/0011207000003443

in Bibtex Style

@conference{icbeb22,
author={Kun Yin and Min Wei and Guo-qiang Long and Ya-lei Liu and Guang-feng Yang},
title={Optimization of Operation Performance and Bacterial Characteristics in SBR Processes for Short-cut Nitrification and Denitrification},
booktitle={Proceedings of the 4th International Conference on Biomedical Engineering and Bioinformatics - Volume 1: ICBEB,},
year={2022},
pages={342-348},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0011207000003443},
isbn={978-989-758-595-1},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 4th International Conference on Biomedical Engineering and Bioinformatics - Volume 1: ICBEB,
TI - Optimization of Operation Performance and Bacterial Characteristics in SBR Processes for Short-cut Nitrification and Denitrification
SN - 978-989-758-595-1
AU - Yin K.
AU - Wei M.
AU - Long G.
AU - Liu Y.
AU - Yang G.
PY - 2022
SP - 342
EP - 348
DO - 10.5220/0011207000003443