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Bioresour Technol. 2016 May;207:109-17. doi: 10.1016/j.biortech.2016.01.090. Epub 2016 Feb 4.

Microbiological mechanism of the improved nitrogen and phosphorus removal by embedding microbial fuel cell in Anaerobic-Anoxic-Oxic wastewater treatment process.

Author information

1
School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China; Institution of Environmental Biology and Life Support Technology, Beihang University, Beijing 100191, China; International Joint Research Center of Aerospace Biotechnology & Medical Engineering, Beihang University, Beijing 100191, China.
2
Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, Beihang University, Beijing 100191, China.
3
Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, China.
4
School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China; Institution of Environmental Biology and Life Support Technology, Beihang University, Beijing 100191, China; International Joint Research Center of Aerospace Biotechnology & Medical Engineering, Beihang University, Beijing 100191, China. Electronic address: LH64@buaa.edu.cn.

Abstract

Anaerobic-Anoxic-Oxic (AA/O) wastewater treatment process is a widely used wastewater treatment process for simultaneous nitrogen and phosphorus removal. Microbial fuel cell (MFC) can generate electricity and treat the organic wastewater simultaneously. Our previous research showed that embedding MFC in AA/O wastewater treatment process could enhance the pollutants removal efficiency. However, the mechanism was not clear. In this study, a lab-scale corridor-style AA/O reactor with MFC embedded was operated and both the total nitrogen and total phosphorus removal efficiencies were enhanced. DGGE and Illumina Miseq results demonstrated that both the microbial community structures on the surface of the cathode and in the suspensions of cathode chamber have been changed. The percentage of Thauera and Emticicia, identified as denitrifying bacteria, increased significantly in the suspension liquid when the MFC was embedded in the AA/O reactor. Moreover, the genus Rheinheimera were significantly enriched on the cathode surface, which might contribute to both the nitrogen removal enhancement and electricity generation.

KEYWORDS:

AA/O; DGGE; Illumina Miseq; Microbial fuel cell

PMID:
26874439
DOI:
10.1016/j.biortech.2016.01.090
[Indexed for MEDLINE]

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