Relationship Between Performance and Microbial Community Structure of the SBBR Autotrophic Nitrogen Removal Process
FANG Fang,QIN Yu,GUO Jin song,JIA Li and YANG Guo hong
DOI:10.11835/j.issn.1674-4764.2010.03.020
Received November 29, 2009,Revised , Accepted , Available online July 01, 2015
Volume ,2010,Pages 113-118
- Abstract
PCR DGGE and real time PCR technologies were applied to analyze the relationship between operation efficiency and microbial community structure of the Sequence Batch Biofilm Reactor(SBBR) autotrophic nitrogen removal process.The reactor was possessed of a high nitrogen removal efficiency.And the similarity of microbial community structure between active sludge and biofilm samples was 58.3%. The features of DO distributing on active sludge and biofilm made an appropriate condition for different bacteria.Ammonium oxidation bacteria and anammox were the preponderant bacterium in reactor.And their co metabolisms made TN removal rate reach to 90% and 80%,respectively.The reactor worked under a low efficiency with low concentration of biofilm.It is found that there is no much difference between biofilm and active sludge samples on the microbial community structure.The similarity reached to 100% and the variety of dominant bacteria was poor.Nitrite oxidation bacteria (NOB) were not “washed out” during the set up time that NO3- was accumulated in this reactor.TN removal rate was only about 20% to 30%.