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[Characteristics and affecting factors of denitrifying phosphorus removal in two-sludge sequencing batch reactor].

Publication ,  Journal Article
Wang, Y-Y; Peng, Y-Z; Yin, F-F; Li, J; Zhang, Y-K
Published in: Huan Jing Ke Xue
June 2008

The characteristics of denitrifying phosphorus removal in a lab-scale two-sludge anaerobic-anoxic/nitrification SBR (A2 NSBR) system were studied fed with domestic wastewater. The influence of some key operation parameters, like C/P, C/N, and HRT, were examined using parallel tests, pH, dissolved oxygen (DO) and redox potential (ORP) were monitored on line to validate whether they could be used as the control parameters for this denitrifying phosphorus removal process. Results indicated that P removal efficiency showed an increased trend on the whole with the increase of the C/P. When the influent C/P was greater than 19.39, good phosphorus removal efficiency was achieved. However, the phosphorus removal efficiency deteriorated once the influent C/P decreased less than 15.36. On the other hand, relatively good phosphorus removal efficiency could be maintained in the A2 NSBR system even at a low C/N ratio, though the denitrification efficiency decrease instead. It is also found that increasing the influent C/N increased the PHB amount stored by polyphosphate accumulating organisms (PAO) and therefore the ultimate denitrification and phosphorus removal efficiency were both improved. For an excessively high C/N, the incompletely reacted COD will be residual to anoxic stage. Thus, the pure denitrification reaction, which preferentially supports OHOs, becomes the dominant reaction. This decreases the amount of available electron acceptors for denitrifying polyphosphate accumulating organisms (DNPAOs) at the anoxic stage which eventually impacts the anoxic phosphorus removal capacity. In addition, since A2 NSBR has two completely independent SBR systems, it benefits to establish a process control system in terms of the parameters DO, ORP, and pH.

Duke Scholars

Published In

Huan Jing Ke Xue

ISSN

0250-3301

Publication Date

June 2008

Volume

29

Issue

6

Start / End Page

1526 / 1532

Location

China

Related Subject Headings

  • Waste Disposal, Fluid
  • Sewage
  • Phosphorus
  • Nitrogen
  • Environmental Sciences
  • Bioreactors
  • Biodegradation, Environmental
  • Bacteria, Anaerobic
  • 4106 Soil sciences
  • 4105 Pollution and contamination
 

Citation

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Wang, Y.-Y., Peng, Y.-Z., Yin, F.-F., Li, J., & Zhang, Y.-K. (2008). [Characteristics and affecting factors of denitrifying phosphorus removal in two-sludge sequencing batch reactor]. Huan Jing Ke Xue, 29(6), 1526–1532.
Wang, Ya-yi, Yong-zhen Peng, Fang-fang Yin, Jun Li, and Yu-kun Zhang. “[Characteristics and affecting factors of denitrifying phosphorus removal in two-sludge sequencing batch reactor].Huan Jing Ke Xue 29, no. 6 (June 2008): 1526–32.
Wang Y-Y, Peng Y-Z, Yin F-F, Li J, Zhang Y-K. [Characteristics and affecting factors of denitrifying phosphorus removal in two-sludge sequencing batch reactor]. Huan Jing Ke Xue. 2008 Jun;29(6):1526–32.
Wang, Ya-yi, et al. “[Characteristics and affecting factors of denitrifying phosphorus removal in two-sludge sequencing batch reactor].Huan Jing Ke Xue, vol. 29, no. 6, June 2008, pp. 1526–32.
Wang Y-Y, Peng Y-Z, Yin F-F, Li J, Zhang Y-K. [Characteristics and affecting factors of denitrifying phosphorus removal in two-sludge sequencing batch reactor]. Huan Jing Ke Xue. 2008 Jun;29(6):1526–1532.

Published In

Huan Jing Ke Xue

ISSN

0250-3301

Publication Date

June 2008

Volume

29

Issue

6

Start / End Page

1526 / 1532

Location

China

Related Subject Headings

  • Waste Disposal, Fluid
  • Sewage
  • Phosphorus
  • Nitrogen
  • Environmental Sciences
  • Bioreactors
  • Biodegradation, Environmental
  • Bacteria, Anaerobic
  • 4106 Soil sciences
  • 4105 Pollution and contamination