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Influence of surface copper content on Stenotrophomonas maltophilia biofilm control using chlorine and mechanical stress.
Biofouling ( IF 2.351 ) Pub Date : 2020-01-30 , DOI: 10.1080/08927014.2019.1708334
I B Gomes,L C Simões,M Simões

This work aimed to evaluate the action of materials with different copper content (0, 57, 96 and 100%) on biofilm formation and control by chlorination and mechanical stress. Stenotrophomonas maltophilia isolated from drinking water was used as a model microorganism and biofilms were developed in a rotating cylinder reactor using realism-based shear stress conditions. Biofilms were characterized phenotypically and exposed to three control strategies: 10 mg l-1 of free chlorine for 10 min, an increased shear stress (a fluid velocity of 1.5 m s-1 for 30s), and a combination of both treatments. These shock treatments were not effective in biofilm control. The benefits from the use of copper surfaces was found essentially in reducing the numbers of non-damaged cells. Copper materials demonstrated better performance in biofilm prevention than chlorine. In general, copper alloys may have a positive public health impact by reducing the number of non-damaged cells in the water delivered after chlorine exposure.
更新日期:2020-04-20

 

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