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A novel wastewater treatment process: simultaneous nitrification, denitrification and phosphorus removal.
Water Sci Technol. 2004; 50(10):163-70.WS

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 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 concentration (DO, 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 (PHA), accompanied with phosphorus release. In the subsequent aerobic stage, PHA was oxidized and phosphorus was taken up to less than 0.5 mg/L at the end of the cycle. Ammonia was also oxidised 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 found that the final denitrification product was mainly nitrous oxide (N2O) not N2. Further experimental results demonstrated that nitrogen removal was via nitrite, not nitrate. These experiments also showed that denitrifying glycogen-accumulating organisms rather than denitrifying polyphosphate-accumulating organisms were responsible for the denitrification activity.

Authors+Show Affiliations

Advanced Wastewater Management Centre, The 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

15656309

Citation

Zeng, R J., et al. "A Novel Wastewater Treatment Process: Simultaneous Nitrification, Denitrification and Phosphorus Removal." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 50, no. 10, 2004, pp. 163-70.
Zeng RJ, Lemaire R, Yuan Z, et al. A novel wastewater treatment process: simultaneous nitrification, denitrification and phosphorus removal. Water Sci Technol. 2004;50(10):163-70.
Zeng, R. J., Lemaire, R., Yuan, Z., & Keller, J. (2004). A novel wastewater treatment process: simultaneous nitrification, denitrification and phosphorus removal. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 50(10), 163-70.
Zeng RJ, et al. A Novel Wastewater Treatment Process: Simultaneous Nitrification, Denitrification and Phosphorus Removal. Water Sci Technol. 2004;50(10):163-70. PubMed PMID: 15656309.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A novel wastewater treatment process: simultaneous nitrification, denitrification and phosphorus removal. AU - Zeng,R J, AU - Lemaire,R, AU - Yuan,Z, AU - Keller,J, PY - 2005/1/20/pubmed PY - 2005/4/20/medline PY - 2005/1/20/entrez SP - 163 EP - 70 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 50 IS - 10 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 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 concentration (DO, 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 (PHA), accompanied with phosphorus release. In the subsequent aerobic stage, PHA was oxidized and phosphorus was taken up to less than 0.5 mg/L at the end of the cycle. Ammonia was also oxidised 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 found that the final denitrification product was mainly nitrous oxide (N2O) not N2. Further experimental results demonstrated that nitrogen removal was via nitrite, not nitrate. These experiments also showed that denitrifying glycogen-accumulating organisms rather than denitrifying polyphosphate-accumulating organisms were responsible for the denitrification activity. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/15656309/A_novel_wastewater_treatment_process:_simultaneous_nitrification_denitrification_and_phosphorus_removal_ DB - PRIME DP - Unbound Medicine ER -