alexa Quantitative Analysis of the Composition and Abundance of Nitrifying Bacteria on Simultaneous Nitrification and Denitrification in SBBR
E- ISSN: 2320 - 3528
P- ISSN: 2347 - 2286

Research & Reviews: Journal of Microbiology and Biotechnology
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Research Article

Quantitative Analysis of the Composition and Abundance of Nitrifying Bacteria on Simultaneous Nitrification and Denitrification in SBBR

Hongwei Rong*, Jingyin Wang, Chaosheng Zhang and Guanhua Gao
Key Laboratory for Water Quality Security and Protection in Pearl River Delta, Ministry of Education and Guangdong Province, Guangzhou University, Guangzhou 510006, PR China
Corresponding Author: Hongwei Rong, Key Laboratory for Water Quality Security and Protection in Pearl River Delta, Ministry of Education and Guangdong Province, Guangzhou University, Guangzhou 510006, PR China, E-mail: [email protected]
Received: 01/07/2015 Accepted: 21/09/2015 Published: 09/11/2015
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Abstract

To reveal the effect of dissolved oxygen (DO) on microorganism community structure during simultaneous nitrification and denitrification (SND) in sequencing biofilm batch reactor (SBBR), the molecular biological techniques of denaturing gradient gel electrophoresis (DGGE), cloning and real-time PCR were applied. DGGE sequence analysis showed some kinds of populations had been highly preponderance consistently, and cloning and phylogenetic tree of AOB gene revealed Nitrsospira was dominant species. The real-time PCR analysis indicated that the amount of the AOB and NOB both had most copy number in the lower surface, and the quantity relation of AOB and NOB population between three samples was “lower surface>upper surface>internal layer”. The result proved that DO concentration directly affected the proportion of aerobic fraction and anoxia fraction in the biofilm, which led to an effect on efficiency of SND.

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