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Water 2017, 9(11), 818; https://doi.org/10.3390/w9110818

Performance of Denitrifying Phosphate Removal via Nitrite from Slaughterhouse Wastewater Treatment at Low Temperature

1
School of Environmental Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
2
Key Laboratory of Xiamen University of Technology, Fujian Province University, Xiamen 361024, China
3
Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
4
Civil Engineering, College of Engineering and Informatics, National University of Ireland, Galway H91 CF50, Ireland
*
Author to whom correspondence should be addressed.
Received: 22 August 2017 / Revised: 19 October 2017 / Accepted: 19 October 2017 / Published: 31 October 2017
(This article belongs to the Special Issue Biological Treatment of Wastewater)
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Abstract

This study aims to investigate the effects of the organic loading rate (OLR) and the aeration rate on denitrifying phosphate removal (DPR) from slaughterhouse wastewater treated at a temperature of 11 °C. Three laboratory-scale intermittently aerated sequencing batch reactors (IASBRs) were set up and three OLRs and five aeration rates were employed in the study. The results indicated that efficient removals of nitrogen (N) and phosphorus (P) from DPR were achieved. Furthermore, the intermittent aeration pattern benefitted both the phosphorus-accumulating organisms (PAOs) and the denitrifying phosphorus-accumulating organisms (DPAOs) that accumulated at 11 °C. The ratio of P uptake in the aeration periods/P release in the non-aeration periods was in the range of 0.94–1.10 in the three stages. The relationship between the specific poly-β-hydroxybutyrate (PHB) degradation rate (z), the specific P removal rate (x), and the specific total oxidized nitrogen(TON) reduction rate (y) can be fitted approximately as a plane ( z = 1.3626 x + 0.2882 y 0.6722 , R2 = 0.83). View Full-Text
Keywords: denitrifying phosphorus removal; DPAOs; enhanced biological phosphorus removal; intermittently aerated sequencing batch reactor; slaughterhouse wastewater denitrifying phosphorus removal; DPAOs; enhanced biological phosphorus removal; intermittently aerated sequencing batch reactor; slaughterhouse wastewater
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Pan, M.; Huang, X.; Wu, G.; Hu, Y.; Yang, Y.; Zhan, X. Performance of Denitrifying Phosphate Removal via Nitrite from Slaughterhouse Wastewater Treatment at Low Temperature. Water 2017, 9, 818.

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