* Autor a quien debe ser dirigida la correspondenciaRecibido Sep. 5, 2016; Aceptado Oct. 3, 2016; Versión final Nov. 11, 2016, Publicado Abr. 2017 Resumen Se evalúa la inhibición de la fijación microalgal en sustratos artificiales, previamente colonizado con bacterias marinas. Debido a la escasez de agua, la región de Antofagasta en Chile desarrolla la desalinización del agua de mar para sus procesos mineros. La carga biológica del agua de mar genera bioincrustaciones que obstruyen los sistemas de flujo. Las bioincrustaciones se inician con la fijación inicial de moléculas y microorganismos como bacterias y microalgas, los cuales sirven de sustrato y alimento para otros colonizadores. Dos cepas de Bacillus pumilus inhibieron la adherencia de mezclas microalgales, demostrando que estarían secretando metabolitos inhibidores de la fijación. Por lo tanto se concluye que es viable utilizar bacterias marinas como B. pumilus para inhibir la fijación inicial a sustratos artificiales como PVC, de microalgas nativas de las costas del norte de Chile. Palabras claves: bioincrustación; Bacillus pumilus; inhibición; microalga; desalinización Marine Bacillus pumilus Inhibitors of the Fixation of Microalgae to Artificial Substrates AbstractThe inhibition of microalgal fixation in artificial substrates, previously colonized with marine bacteria is evaluated. Due to the shortage of water, the region of Antofagasta in Chile develops desalination of seawater for its mining processes. The Bioburden of the seawater generates biofouling and obstructing of the flow systems. Biofouling start with the initial attachment of molecules and microorganisms like bacteria and microalgae, which serve as substrate and food for other colonists. Two strains of Bacillus pumilus inhibited adhesion of microalgal mix, showing that they produce metabolites that inhibits fixation. It is therefore concluded that it is feasible to use of the marine bacteria B. pumilus to inhibit the initial fixation to artificial substrates such as PVC, of native microalgae the coasts of northern Chile.
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