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Simultaneous nitrification, denitrification, and phosphorus removal in a lab-scale sequencing batch reactor.
Biotechnol Bioeng. 2003 Oct 20; 84(2):170-8.BB

Abstract

Simultaneous nitrification and denitrification (SND) via the nitrite pathway and anaerobic-anoxic-enhanced biological phosphorus removal (EBPR) are two processes that can significantly reduce the energy and COD demand for nitrogen and phosphorus removal. The combination of these two processes has the potential of achieving simultaneous nitrogen and phosphorus removal with a minimal requirement for COD. A lab-scale sequencing batch reactor (SBR) was operated in alternating anaerobic-aerobic mode with a low dissolved oxygen (DO) concentration (0.5 mg/L) during the aerobic period, and was demonstrated to accomplish nitrification, denitrification, and phosphorus removal. Under anaerobic conditions, COD was taken up and converted to polyhydroxyalkanoates (PHAs), accompanied by phosphorus release. In the subsequent aerobic stage, PHA was oxidized and phosphorus was taken up to <0.5 mg/L by the end of the cycle. Ammonia was also oxidized during the aerobic period, but without accumulation of nitrite or nitrate in the system, indicating the occurrence of simultaneous nitrification and denitrification. However, off-gas analysis showed that the final denitrification product was mainly nitrous oxide (N(2)O), not N(2). Further experimental results demonstrated that nitrogen removal was via nitrite, not nitrate. These experiments also showed that denitrifying glycogen-accumulating organisms (DGAOs), rather than denitrifying polyphosphate-accumulating organisms (DPAOs), were responsible for the denitrification activity.

Authors+Show Affiliations

Advanced Wastewater Management Centre, University of Queensland, St Lucia, Brisbane 4072, Australia.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

12966573

Citation

Zeng, Raymond J., et al. "Simultaneous Nitrification, Denitrification, and Phosphorus Removal in a Lab-scale Sequencing Batch Reactor." Biotechnology and Bioengineering, vol. 84, no. 2, 2003, pp. 170-8.
Zeng RJ, Lemaire R, Yuan Z, et al. Simultaneous nitrification, denitrification, and phosphorus removal in a lab-scale sequencing batch reactor. Biotechnol Bioeng. 2003;84(2):170-8.
Zeng, R. J., Lemaire, R., Yuan, Z., & Keller, J. (2003). Simultaneous nitrification, denitrification, and phosphorus removal in a lab-scale sequencing batch reactor. Biotechnology and Bioengineering, 84(2), 170-8.
Zeng RJ, et al. Simultaneous Nitrification, Denitrification, and Phosphorus Removal in a Lab-scale Sequencing Batch Reactor. Biotechnol Bioeng. 2003 Oct 20;84(2):170-8. PubMed PMID: 12966573.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Simultaneous nitrification, denitrification, and phosphorus removal in a lab-scale sequencing batch reactor. AU - Zeng,Raymond J, AU - Lemaire,Romain, AU - Yuan,Zhiguo, AU - Keller,Jürg, PY - 2003/9/11/pubmed PY - 2004/5/20/medline PY - 2003/9/11/entrez SP - 170 EP - 8 JF - Biotechnology and bioengineering JO - Biotechnol Bioeng VL - 84 IS - 2 N2 - Simultaneous nitrification and denitrification (SND) via the nitrite pathway and anaerobic-anoxic-enhanced biological phosphorus removal (EBPR) are two processes that can significantly reduce the energy and COD demand for nitrogen and phosphorus removal. The combination of these two processes has the potential of achieving simultaneous nitrogen and phosphorus removal with a minimal requirement for COD. A lab-scale sequencing batch reactor (SBR) was operated in alternating anaerobic-aerobic mode with a low dissolved oxygen (DO) concentration (0.5 mg/L) during the aerobic period, and was demonstrated to accomplish nitrification, denitrification, and phosphorus removal. Under anaerobic conditions, COD was taken up and converted to polyhydroxyalkanoates (PHAs), accompanied by phosphorus release. In the subsequent aerobic stage, PHA was oxidized and phosphorus was taken up to <0.5 mg/L by the end of the cycle. Ammonia was also oxidized during the aerobic period, but without accumulation of nitrite or nitrate in the system, indicating the occurrence of simultaneous nitrification and denitrification. However, off-gas analysis showed that the final denitrification product was mainly nitrous oxide (N(2)O), not N(2). Further experimental results demonstrated that nitrogen removal was via nitrite, not nitrate. These experiments also showed that denitrifying glycogen-accumulating organisms (DGAOs), rather than denitrifying polyphosphate-accumulating organisms (DPAOs), were responsible for the denitrification activity. SN - 0006-3592 UR - https://www.unboundmedicine.com/medline/citation/12966573/Simultaneous_nitrification_denitrification_and_phosphorus_removal_in_a_lab_scale_sequencing_batch_reactor_ L2 - https://doi.org/10.1002/bit.10744 DB - PRIME DP - Unbound Medicine ER -