scholarly journals Differentiation in Nitrogen-Converting Activity and Microbial Community Structure between Granular Size Fractions in a Continuous Autotrophic Nitrogen Removal Reactor

2017 ◽  
Vol 27 (10) ◽  
pp. 1798-1807 ◽  
Author(s):  
Feiyue Qian ◽  
Xi Chen ◽  
Jianfang Wang ◽  
Yaoliang Shen ◽  
Junjun Gao ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Nitrogen Removal ◽  
Microbial Community Structure ◽  
Size Fractions ◽  
Autotrophic Nitrogen Removal

Effect of pH on the Microbial Community Structure of SBBR Autotrophic Nitrogen Removal Process

2011 ◽  
Vol 378-379 ◽  
pp. 428-432
Author(s):  
Yu Qin ◽  
Jing Song Guo ◽  
Fang Fang
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Nitrogen Removal ◽  
Microbial Community Structure ◽  
Anaerobic Bacteria ◽  
Biofilm Reactor ◽  
Active Sludge ◽  
Removal Process ◽  
The Relationship ◽  
Autotrophic Nitrogen Removal

PCR-DGGE was applied to analyze the relationship between pH and the microbial community structure of Sequence Batch Biofilm Reactor (SBBR) autotrophic nitrogen removal process. The reactor was possessed of a high nitrogen removal efficiency at pH=8.0 where the similarity of microbial community structure between active sludge and biofilm samples was the lowest about 84.6% and the richness of bacterial community was the most abundant in biofilm compared with other pH conditions. pH=7.0 was good for the microbes in active sludge but unfavorable for anaerobic bacteria. At pH=9.0, the effects were presented with both bacterial activities and microbial community structure and when pH=6.0 the amount of microbial types dramatically dropped

scholarly journals Effect of C/N ratios on nitrogen removal and microbial communities in the anaerobic baffled reactor (ABR) with an anammox-coupling-denitrification process

2018 ◽  
Vol 78 (11) ◽  
pp. 2338-2348 ◽  
Author(s):  
Chongjun Chen ◽  
Min Zhang ◽  
Xuliang Yu ◽  
Juan Mei ◽  
Ying Jiang ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Communities ◽  
High Throughput ◽  
Nitrogen Removal ◽  
Microbial Community Structure ◽  
Anammox Bacterium ◽  
Miseq Sequencing ◽  
Anaerobic Baffled Reactor ◽  
Denitrification Process

Abstract Effects of different C/N (NO2–N) ratios on nitrogen removal and microbial community structure were investigated using an anaerobic baffled reactor (ABR). Results indicated that the C/N ratio exerted an important effect on nitrogen removal in the anammox-coupling-denitrification process associated with the ABR. When the C/N ratio was 1.29, the ABR could achieve the highest total nitrogen (TN) removal efficiency of 99.9%. Most of TN was removed in the 1st and 2nd compartment, accounting for about 81.0–97.6% of total TN removal. The nitrogen removal resulted from the interaction among anammox, heterotrophic denitrificans, and other microbes within the ABR. The contribution of anammox to nitrogen removal varied from 6.8% to 32.4%. High-throughput MiSeq sequencing analyses revealed that the C/N ratio was one of the most important factors regulating the microbial community structure, and the predominant phylum changed from Proteobacteria to Chloroflexi with the elevated C/N ratio. In addition, the Candidatus Brocadia was the major anammox bacterium, and its percentage varied from 1.0–2.9% at day 9 to 2.8–9.1% at day 46.

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