Formation and microbial community analysis of chloroanilines-degrading aerobic granules in the sequencing airlift bioreactor.

Formation and microbial community analysis of chloroanilines-degrading aerobic granules in the sequencing airlift bioreactor. Research Abstract Details 

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Formation and microbial community analysis of chloroanilines-degrading aerobic granules in the sequencing airlift bioreactor. Abstract Text:

L Zhu,X Xu,W Luo,D Cao,Y Yang,L Zhu,X Xu,W Luo,D Cao,Y Yang,

Aims: This paper investigates a selection-based acclimation strategy for improving the performance and stability of aerobic granules at a high chloroanilines loading. Methods and Results: The experiments were conducted in a sequencing airlift bioreactor (SABR) to develop aerobic granules fed with chloroanilines (ClA). The evolution of aerobic granulation was monitored using image analysis and scanning electron microscopy, and PCR-DGGE analysis of microbial community was performed. The sludge granulation was apparently developed by decreased settling time and gradual increased ClA loading to 0.8 kg m(-3) day(-1). A steady-state performance of the granular SABR was reached at last, as evidenced by biomass concentration of 6.3 g l(-1) and constant ClA removal efficiency of 99.9%. The mature granules had a mean size of 1.55 mm, minimal settling velocity of 68.4 m h(-1), specific ClA degradation rate of 0.181 g gVSS(-1) day(-1). Phylogenetic analysis of aerobic ClA-degrading granules confirmed the dominance of beta-, gamma-Proteobacteria and Flavobacteria. Conclusions: The chosen operating strategy involving step increase in ClA loading and enhancement of major selection pressures was successful in cultivating the aerobic ClA-degrading granules. Significance and Impact of the Study: This research could be helpful for improving the stability of aerobic granules via optimizing operating conditions and developing economic feasible full-scale granular bioreactor.

Formation and microbial community analysis of chloroanilines-degrading aerobic granules in the sequencing airlift bioreactor. Publishing Authors By Initials

L Zhu,X Xu,W Luo,D Cao,Y Yang,L Zhu,X Xu,W Luo,D Cao,Y Yang,

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Formation and microbial community analysis of chloroanilines-degrading aerobic granules in the sequencing airlift bioreactor. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of applied microbiology

VOLUME: 104

Page Numbers: 152-60

Journal Abbreviation: J. Appl. Microbiol.

ISSN: 1364-5072

DAY: 21

MONTH: 09

YEAR: 2007

Formation and microbial community analysis of chloroanilines-degrading aerobic granules in the sequencing airlift bioreactor. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Formation and microbial community analysis of chloroanilines-degrading aerobic granules in the sequencing airlift bioreactor.

AFFILIATION: Department of Environmental Engineering, Zhejiang University, Hangzhou, China.

Country: England

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MEDLINETA: J Appl Microbiol

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