Enhanced nutrients removal from municipal wastewater through biological phosphorus removal followed by partial nitritation/anammox

doi:10.1007/s11783-017-0911-0

Front. Environ. Sci. Eng.

2017, Vol. 11

Issue (2) : 8 https://doi.org/10.1007/s11783-017-0911-0

RESEARCH ARTICLE

Enhanced nutrients removal from municipal wastewater through biological phosphorus removal followed by partial nitritation/anammox

Yandong Yang¹,Liang Zhang²,Hedong Shao²,Shujun Zhang³,Pengchao Gu³,Yongzhen Peng^1,²(

)

¹. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
². National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
³. Beijing Drainage Group Co. Ltd., Beijing 100022, China

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Abstract

EBPR and PN/A were combined to enhance nutrients removal from municipal wastewater.

High effluent quality of 0.25 mg TP?L⁻¹ and 10.8 mg TN?L⁻¹ was obtained.

Phosphorus and nitrogen removal was achieved in two separated units.

A proper post-anoxic phase improved the nitrogen removal performance of PN/A unit.

Conventional biological removal of nitrogen and phosphorus is usually limited due to the lack of biodegradable carbon source, therefore, new methods are needed. In this study, a new alternative consisting of enhanced biological phosphorus removal (EBPR) followed by partial nitritation-anammox (PN/A), is proposed to enhance nutrients removal from municipal wastewater. Research was carried out in a laboratory-scale system of combined two sequencing batch reactors (SBRs). In SBR1, phosphorus removal was achieved under an alternating anaerobic-aerobic condition and ammonium concentration stayed the same since nitrifiers were washed out from the reactor under short sludge retention time of 2–3 d. The remaining ammonium was further treated in SBR2 where PN/A was established by inoculation. A maximum of nitrogen removal rate of 0.12 kg N?m⁻³?d⁻¹ was finally achieved. During the stable period, effluent concentrations of total phosphorus and total nitrogen were 0.25 and 10.8 mg?L⁻¹, respectively. This study suggests EBPR-PN/A process is feasible to enhance nutrients removal from municipal wastewater of low influent carbon source.

Keywords Phosphorus removal Partial nitrification Anammox Municipal wastewater

Corresponding Author(s): Yongzhen Peng

Issue Date: 23 March 2017

Cite this article:

Yandong Yang,Liang Zhang,Hedong Shao, et al. Enhanced nutrients removal from municipal wastewater through biological phosphorus removal followed by partial nitritation/anammox[J]. Front. Environ. Sci. Eng., 2017, 11(2): 8.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-017-0911-0
https://academic.hep.com.cn/fese/EN/Y2017/V11/I2/8

Fig.1 Schematic diagram of the EBPR-PN/A process

Fig.2 Nutrient removal performance of SBR1 (EBPR unit): variations of influent TP, influent ammonium, effluent TP, effluent ammonium and TP removal efficiency

Fig.3 Nitrogen removal performance of SBR2 (PN/A unit): variations of influent ammonium, and effluent ammonium, nitrite, nitrate and TN

Tab.1 Summary of system performance of PN/A reactor in phase I and II

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