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Species composition determines bioplastics production in photosynthetic microbiomes: strategy to enrich cyanobacteria PHB-producers
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  • Beatriz Altamira-Algarra,
  • Artai Lage,
  • Joan Garcia,
  • Eva Gonzalez-Flo
Beatriz Altamira-Algarra
Universitat Politècnica de Catalunya
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Artai Lage
Universitat Politècnica de Catalunya
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Joan Garcia
Universitat Politècnica de Catalunya
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Eva Gonzalez-Flo
Universitat Politècnica de Catalunya

Corresponding Author:[email protected]

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Abstract

The aim of this study was to set the operating mode in regards to nutrients, temperature and light to use as a strategy to enrich a microbiome rich in cyanobacteria in polyhidroxybutyrate (PHB)-producers in order to enhance the biopolymer production. Alternate growth and accumulation phases were conducted for 179 days in a 3 L photobioreactor. Although, presence of green microalgae potentially reduced PHB production, the microbiome produced up to 22 % dry cell weight (dcw) PHB. Results highlighted the important role of culture composition and suggested that this methodology could be applied to a robust microbiome rich in cyanobacteria to boost PHB production.