Simultaneous Nitrification and Denitrification Associated Phosphorus Uptake Properties of Sludge Subjected to EBPR with Efficient Micro Aeration

DOI

10.2991/icaees-15.2015.282How to use a DOI?

Keywords

Enhanced biological phosphorus removal (EBPR); simultaneous nitrification and denitrification; micro aeration

Abstract

Simultaneous nitrification and denitrification (SND) under low dissolved oxygen (DO) and anaerobic/aerobic(anoxic) enhanced phosphorus removal (EBPR) are two processes that can significantly reduce the energy and carbon required for nutrient removal. The combination of the two processes is expected to achieve biological nutrient removal with minimal requirement of oxygen and carbon. In this study, a lab-scale sequencing batch reactor (SBR) was operated to perform simultaneous nitrification and denitrification as well as phosphorus removal (SNDPR) with micro aeration. The EBPR system showed a high phosphorus removal efficiency (phosphate in effluent <0.5 mg/L) and complete ammonia oxidation without accumulation of nitrite and nitrate under low dissolved oxygen (DO) concentration (controlled at 0.2 mg/L). Regular operation and batch test demonstrated that the sludge was capable of using nitrite as electron acceptor to take up phosphate, the maximum specific denitrifying phosphorus uptake rates of adding 10 mg/L and 50 mg/L NO2--N to maximum specific aerobic phosphorus uptake rate were 44.9% and 87.2%, respectively. Moreover, batch tests suggested that ammonia nitrogen was removed through simultaneous nitrification and denitrification rather than anaerobic ammonium oxidation, whereas ammonia oxidized bacteria (AOB) and nitrite oxidized bacteria (NOB) were found to be less active than PAOs under low DO environment.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Juan Ma
AU  - Xiaojun Yu
AU  - Lu Song
AU  - Hongwei Sun
AU  - Daniel R. Noguera
PY  - 2015/07
DA  - 2015/07
TI  - Simultaneous Nitrification and Denitrification Associated Phosphorus Uptake Properties of Sludge Subjected to EBPR with Efficient Micro Aeration
BT  - Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015
PB  - Atlantis Press
SP  - 1515
EP  - 1523
SN  - 2352-5401
UR  - https://doi.org/10.2991/icaees-15.2015.282
DO  - 10.2991/icaees-15.2015.282
ID  - Ma2015/07
ER  -