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Front. Microbiol. | doi: 10.3389/fmicb.2018.02295

New biocide foam containing hydrogen peroxide for the decontamination of vertical surface contaminated with Bacillus thuringiensis spores

  • 1Service de Pharmacologie et Immunoanalyse (SPI), INRA, CEA Marcoule, France
  • 2Service des Procédés de Décontamination et d'Enrobage (SPDE), CEA Marcoule, France
  • 3Université de Rouen, France

Despite scientific advances, bacterial spores remain a major preoccupation in many different fields, such as the hospital, food and CBRN-E Defense sector. Although many disinfectant technologies exist, there is a lack for the decontamination of difficult to access areas, outdoor sites or large interior volumes. This study evaluates the decontamination efficiency of an aqueous foam containing hydrogen peroxide, with the efficiency of disinfectant in the liquid form on vertical surfaces contaminated by Bacillus thurengiensis spores. The decontamination efficiency impact of the surfactant and stabilizer agents in the foam and liquid forms was evaluated. No interferences were observed with these two chemical additives. Our results indicate that the decontamination kinetics of both foam and liquid forms are similar. In addition, while the foam form was as efficient as the liquid solution at 4°C, it was even more so at 30°C. The foam decontamination reaction follows the Arrhenius law, which enables the decontamination kinetic to be predicted with the temperature. Moreover, the foam process used via spraying or filling is more attractive due to the generation of lower quantity of liquid effluents. Our findings highlight the greater suitability of foam to decontaminate difficult to access and high volume facilities compared to liquid solutions.

Keywords: Bacillus thuringiensis, Spores, Decontamination, Hydrogen Peroxide, foam, Biocide

Received: 14 Nov 2017; Accepted: 07 Sep 2018.

Edited by:

Guillermina Hernandez-Raquet, Institut National de la Recherche Agronomique (INRA), France

Reviewed by:

Louis Coroller, Université de Bretagne Occidentale, France
Catherine Duport, University of Avignon, France
Nadia OULAHAL, Claude Bernard University Lyon 1, France  

Copyright: © 2018 Le Toquin, Faure, Orange and Gas. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Mrs. Fabienne Gas, CEA Marcoule, Service de Pharmacologie et Immunoanalyse (SPI), INRA, Bagnols-sur-Cèze, 30200, France, fabienne.gas@cea.fr