Evaluating the Effect of Nonaerobic Hydraulic Retention Time on Nutrients Removal in Nonaerobic and Aerobic SBR
Publication: Journal of Environmental Engineering
Volume 149, Issue 8
Abstract
The nonaerobic stage is critical for the processes of denitrification and phosphorus release in biological wastewater treatment. A lab-scale sequencing batch reactor (SBR) operating as nonaerobic/aerobic was used to treat synthetic wastewater, and the nutrients removal performance was investigated under different nonaerobic hydraulic retention times (HRTs). The results showed when the nonaerobic HRT changed from 0 to 4 h with constant aerobic HRT of 8 h [dissolved oxygen (DO) ], the removal efficiencies of and were all above 90.00%, respectively. The nonaerobic HRT could influence carbon utilization between denitrification and phosphorus release, which showed a close relationship with the ratio of consumed chemical oxygen demand to (0.94). Specifically, the consumed increased with the increase of nonaerobic HRT (0.90), whereas the relationship between consumed and nonaerobic HRT was limited (). Furthermore, internal carbon source produced through phosphorus release could promote simultaneous nitrification denitrification. This control strategy could be conveniently applied in intermittent-flow sewage treatment plant through adjusting nonaerobic HRT.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This research was supported by the National Natural Science Fund (42107427), and the Science and Technology Foundation of Henan Province (222102320426). We acknowledge the support of Zhengzhou University for providing access to the research resources. Finally, we thank all reviewers and the editor for their constructive inputs for improving the manuscript.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 149 • Issue 8 • August 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jan 7, 2023
Accepted: Mar 30, 2023
Published online: May 26, 2023
Published in print: Aug 1, 2023
Discussion open until: Oct 26, 2023
ASCE Technical Topics:
- Aerobic processes
- Biological processes
- Carbon fibers
- Chemical compounds
- Chemical elements
- Chemical processes
- Chemicals
- Chemistry
- Denitrification
- Engineering materials (by type)
- Environmental engineering
- Fibers
- Hydraulic engineering
- Hydraulics
- Materials engineering
- Nutrient pollution
- Phosphorus
- Pollution
- Waste management
- Wastewater management
- Wastewater treatment
- Water and water resources
- Water pollution
- Water treatment
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