Effect of protein, polysaccharide, and oxygen concentration profiles on biofilm cohesiveness.

Effect of protein, polysaccharide, and oxygen concentration profiles on biofilm cohesiveness. Research Abstract Details 

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Effect of protein, polysaccharide, and oxygen concentration profiles on biofilm cohesiveness. Abstract Text:

Francois Ahimou,Michael J Semmens,Greg Haugstad,Paige J Novak,Francois Ahimou,Michael J Semmens,Greg Haugstad,Paige J Novak,

It is important to control biofilm cohesiveness to optimize process performance. In this study, a membrane-aerated biofilm reactor inoculated with activated sludge was used to grow mixed-culture biofilms of different ages and thicknesses. The cohesions, or cohesive energy levels per unit volume of biofilm, based on a reproducible method using atomic force microscopy (F. Ahimou, M. J. Semmens, P. J. Novak, and G. Haugstad, Appl. Environ. Microbiol. 73:2897-2904, 2007), were determined at different locations within the depths of the biofilms. In addition, the protein and polysaccharide concentrations within the biofilm depths, as well as the dissolved oxygen (DO) concentration profiles within the biofilms, were measured. It was found that biofilm cohesion increased with depth but not with age. Level of biofilm cohesive energy per unit volume was strongly correlated with biofilm polysaccharide concentration, which increased with depth in the membrane-aerated biofilm. In a 12-day-old biofilm, DO also increased with depth and may therefore be linked to polysaccharide production. In contrast, protein concentration was relatively constant within the biofilm and did not appear to influence cohesion.

Effect of protein, polysaccharide, and oxygen concentration profiles on biofilm cohesiveness. Publishing Authors By Initials

F Ahimou,MJ Semmens,G Haugstad,PJ Novak,F Ahimou,MJ Semmens,G Haugstad,PJ Novak,

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Effect of protein, polysaccharide, and oxygen concentration profiles on biofilm cohesiveness. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Applied and environmental microbiology

VOLUME: 73

Page Numbers: 2905-10

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ISSN: 0099-2240

DAY: 2

MONTH: 03

YEAR: 2007

Effect of protein, polysaccharide, and oxygen concentration profiles on biofilm cohesiveness. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Effect of protein, polysaccharide, and oxygen concentration profiles on biofilm cohesiveness.

AFFILIATION: 3M Medical Division, 3M Center, Building 270-03-N-02, Saint Paul, MN 55144, USA. fahimou@mmm.com

Country: United States

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MEDLINETA: Appl Environ Microbiol

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