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Open AccessArticle

Quorum Sensing versus Quenching Bacterial Isolates Obtained from MBR Plants Treating Leachates from Municipal Solid Waste

1
Department of Genetics, Physiology and Microbiology, Complutense University of Madrid, 28040 Madrid, Spain
2
Department of Biochemistry and Molecular Biology I, Complutense University of Madrid, 28040 Madrid, Spain
3
Department of Chemical and Nuclear Engineering, Polytechnic University of Valencia, 46022 Valencia, Spain
4
Department of Microbiology and Parasitology—CIBUS, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
5
URBASER S.A., Camino de Hormigueras, 171, 28031 Madrid, Spain
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2018, 15(5), 1019; https://doi.org/10.3390/ijerph15051019
Received: 16 April 2018 / Revised: 12 May 2018 / Accepted: 15 May 2018 / Published: 18 May 2018
(This article belongs to the Special Issue Membrane Technologies for Water and Wastewater Treatment)
Quorum sensing (QS) is a mechanism dependent on bacterial density. This coordinated process is mediated by the synthesis and the secretion of signal molecules, called autoinducers (AIs). N-acyl-homoserine lactones (AHLs) are the most common AIs that are used by Gram-negative bacteria and are involved in biofilm formation. Quorum Quenching (QQ) is the interference of QS by producing hydrolyzing enzymes, among other strategies. The main objective of the present study was to identify QS and QQ strains from MBR wastewater treatment plants. A total of 99 strains were isolated from two Spanish plants that were intended to treat leachate from municipal solid waste. Five AHL producers were detected using AHL biosensor strains (Chromobacterium violaceum CV026 and Agrobacterium tumefaciens NT1). Fifteen strains of seventy-one Gram-positive were capable of eliminating or reducing at least one AHL activity. The analysis of 16S rRNA gene sequence showed the importance of the Pseudomonas genus in the production of biofilms and the relevance of the genus Bacillus in the disruption of the QS mechanism, in which the potential activity of lactonase or acylase enzymes was investigated with the aim to contribute to solve biofouling problems and to increase the useful lifespan of membranes. View Full-Text
Keywords: quorum sensing; quorum quenching; AHL; biofouling; MBR; wastewater treatment quorum sensing; quorum quenching; AHL; biofouling; MBR; wastewater treatment
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MDPI and ACS Style

Soler, A.; Arregui, L.; Arroyo, M.; Mendoza, J.A.; Muras, A.; Álvarez, C.; García-Vera, C.; Marquina, D.; Santos, A.; Serrano, S. Quorum Sensing versus Quenching Bacterial Isolates Obtained from MBR Plants Treating Leachates from Municipal Solid Waste. Int. J. Environ. Res. Public Health 2018, 15, 1019.

AMA Style

Soler A, Arregui L, Arroyo M, Mendoza JA, Muras A, Álvarez C, García-Vera C, Marquina D, Santos A, Serrano S. Quorum Sensing versus Quenching Bacterial Isolates Obtained from MBR Plants Treating Leachates from Municipal Solid Waste. International Journal of Environmental Research and Public Health. 2018; 15(5):1019.

Chicago/Turabian Style

Soler, Albert; Arregui, Lucía; Arroyo, Miguel; Mendoza, José A.; Muras, Andrea; Álvarez, Cristina; García-Vera, Cristina; Marquina, Domingo; Santos, Antonio; Serrano, Susana. 2018. "Quorum Sensing versus Quenching Bacterial Isolates Obtained from MBR Plants Treating Leachates from Municipal Solid Waste" Int. J. Environ. Res. Public Health 15, no. 5: 1019.

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