Effect of different carbon sources on performance of an A<sub>2</sub>N-MBR process and its microbial community structure

doi:10.1007/s11783-017-0981-z

Front. Environ. Sci. Eng.

2018, Vol. 12

Issue (2) : 4 https://doi.org/10.1007/s11783-017-0981-z

RESEARCH ARTICLE

Effect of different carbon sources on performance of an A₂N-MBR process and its microbial community structure

Dongliang Du¹, Chuanyi Zhang¹(

), Kuixia Zhao², Guangrong Sun¹, Siqi Zou¹, Limei Yuan¹, Shilong He¹

¹. School of Environment and Spatial Informatics, China University of Mining & Technology, Xuzhou 221116, China
². Guangdong polytechnic of Water Resources and Electric Engineering, Guangzhou 510635, China

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Abstract

The nutrient removal was higeher with short-chain fatty acids as carbon source.

Candidatus Accumulibacter was more easily enriched in A₂N-MBR process.

Short-chain fatty acids were beneficial to the growth of PAOs.

Effect of different carbon sources on purification performance and change of microbial community structure in a novel A₂N-MBR process were investigated. The results showed that when fed with acetate, propionate or acetate and propionate mixed (1:1) as carbon sources, the effluent COD, NH₄⁺-N, TN and TP were lower than 30, 5, 15 and 0.5 mg·L^-¹, respectively. However, taken glucose as carbon source, the TP concentration of effluent reached 2.6 mg·L^-¹. Process analysis found that the amount of anaerobic phosphorus release would be the key factor to determine the above effectiveness. The acetate was beneficial to the growth ofCandidatus Accumulibacter associated with biological phosphorus removal, which was the main cause of high efficiency phosphorus removal in this system. In addition, it could eliminate theCandidatus Competibacter associated with glycogen-accumulating organisms and guarantee high efficiency phosphorus uptake of phosphorus accumulating organisms in the system with acetate as carbon source.

Keywords Denitrifying phosphorus removal Alternate anaerobic/anoxic-aerobic MBR (A₂N-MBR) Carbon source Operation characteristic Community structure

Corresponding Author(s): Chuanyi Zhang

Issue Date: 09 August 2017

Cite this article:

Dongliang Du,Chuanyi Zhang,Kuixia Zhao, et al. Effect of different carbon sources on performance of an A₂N-MBR process and its microbial community structure[J]. Front. Environ. Sci. Eng., 2018, 12(2): 4.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-017-0981-z
https://academic.hep.com.cn/fese/EN/Y2018/V12/I2/4

Fig.1 Schematic diagram of A₂N-MBR system

Fig.2 Concentration changes of COD (a), Nitrogen (b) and TP (c) during operation period of different carbon source systems

Fig.3 Anaerobic phosphorus release (a) and phosphorus release rate curves (b) of different carbon source systems

Fig.4 Anoxic phosphorus absorption curve of different carbon source systems

Tab.1 The community diversity under 3% cutoff divided OTU condition

Fig.5 The dominant “phylum” (a) and “genus” (b) in systems of phosphorus removal sludge with different carbon sources

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