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Anoxic phosphorus removal in a pilot scale anaerobic-anoxic oxidation ditch process.
- Source :
- Frontiers of Environmental Science & Engineering in China; Mar2009, Vol. 3 Issue 1, p106-111, 6p
- Publication Year :
- 2009
-
Abstract
- The anaerobic-anoxic oxidation ditch (A<superscript>2</superscript>/O OD) process is popularly used to eliminate nutrients from domestic wastewater. In order to identify the existence of denitrifying phosphorus removing bacteria (DPB), evaluate the contribution of DPB to biological nutrient removal, and enhance the denitrifying phosphorus removal in the A<superscript>2</superscript>/O OD process, a pilot-scale A<superscript>2</superscript>/O OD plant (375 L) was conducted. At the same time batch tests using sequence batch reactors (12 L and 4 L) were operated to reveal the significance of anoxic phosphorus removal. The results indicated that: The average removal efficiency of COD, NH, PO, and TN were 88.2%, 92.6%, 87.8%, and 73.1%, respectively, when the steady state of the pilotscale A<superscript>2</superscript>/O OD plant was reached during 31–73 d, demonstrating a good denitrifying phosphorus removal performance. Phosphorus uptake took place in the anoxic zone by poly-phosphorus accumulating organisms NO could be used as electron receptors in denitrifying phosphorus removal, and the phosphorus uptake rate with NO as the electron receptor was higher than that with NO when the initial concentration of either NO or NO was 40 mg/L. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16737415
- Volume :
- 3
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Frontiers of Environmental Science & Engineering in China
- Publication Type :
- Academic Journal
- Accession number :
- 49616230
- Full Text :
- https://doi.org/10.1007/s11783-009-0005-8