Community analysis of ammonia and nitrite oxidizers in start-up of aerobic granular sludge reactor.

Community analysis of ammonia and nitrite oxidizers in start-up of aerobic granular sludge reactor. Research Abstract Details 

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Community analysis of ammonia and nitrite oxidizers in start-up of aerobic granular sludge reactor. Abstract Text:

Feng Wang,Si-qing Xia,Yi Liu,Xue-song Chen,Jun Zhang,Feng Wang,Si-qing Xia,Yi Liu,Xue-song Chen,Jun Zhang,Feng Wang,Si-qing Xia,Yi Liu,Xue-song Chen,Jun Zhang,

A lab-scale sequencing batch reactor (SBR) was set-up and the aerobic granular sludge was successfully incubated using anaerobic granular sludge as seed sludge. Nitrogen was partially removed by simultaneous nitrification and denitrification (SND) via nitrite with free ammonia (FA) of about 10 mg/L. The denaturing gradient gel electrophoresis (DGGE) method was used to investigate community structure of alpha-Proteobacteria, beta-Proteobacteria, ammonia oxidizing bacteria (AOB), and Nitrospira populations during start-up. The population sizes of bacteria, AOB and Nitrospira were examined using real-time PCR method. The analysis of community structure and Shannon index showed that stable structure of AOB population was obtained at day 35, while the communities of alpha-Proteobacteria, beta-Proteobacteria, and Nitrospira became stable after day 45. At stable stage, the average cell densities were 1.1 x 10(12), 2.2 x 10(10) and 1.0 x 10(10) cells/L for bacteria, AOB and Nitrospira, respectively. The relationship between characteristics of nitrifying bacteria community and nitrogenous substrate utilization constant was discussed by calculating Pearson correlation. Certain correlation seemed to exist between population size, biodiversity, and degradation constant. And the influence of population size might be greater than that of biodiversity.

Community analysis of ammonia and nitrite oxidizers in start-up of aerobic granular sludge reactor. Publishing Authors By Initials

F Wang,SQ Xia,Y Liu,XS Chen,J Zhang,F Wang,SQ Xia,Y Liu,XS Chen,J Zhang,F Wang,SQ Xia,Y Liu,XS Chen,J Zhang,

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Community analysis of ammonia and nitrite oxidizers in start-up of aerobic granular sludge reactor. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of environmental sciences (China)

VOLUME: 19

Page Numbers: 996-1002

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ISSN: 1001-0742

DAY: 29

MONTH: 10

YEAR: 2007

Community analysis of ammonia and nitrite oxidizers in start-up of aerobic granular sludge reactor. Information

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LANGUAGE: eng

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AFFILIATION: State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. Tongji_wangfeng@yahoo.com.cn

Country: Netherlands

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MEDLINETA: J Environ Sci (China)

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