Efficacy of chemical agents and power ultrasound on biofilms formed by Asaia spp. – spoilage bacteria in beverage industries

https://doi.org/10.17221/235/2018-CJFSCitation:Šístková I., Horsáková I., Čeřovský M., Čížková H. (2019): Efficacy of chemical agents and power ultrasound on biofilms formed by Asaia spp. – spoilage bacteria in beverage industries. Czech J. Food Sci., 37: 221-225.
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Spoilage bacteria were isolated from spoiled fruit-flavoured bottled water with a visual defect in the form of floating flocks. The bacteria were identified as Asaia lannensis using the PCR technique. The efficacy of five chemical agents commonly used in the beverage industry and of power ultrasound (PUS) on Asaia biofilms was studied. A static cultivation procedure on stainless steel plates was used and the efficacy of the chemical agents was tested in two stages. First, only the chemical agents were used. Second, the effect of the application of PUS for 1 min prior to the application of the chemical agents was tested. The most effective chemical agent was the one based on peracetic acid. Its use without PUS proved to be more effective than a combination of any of the other chemical agents with PUS. The least effective methods included the physical sanitation by PUS, the chemical agent based on a 10% solution of sodium hypochlorite and sodium hydroxide, and the chemical agent containing a 0.3% solution of chlorine dioxide.

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