Macroalgal biomass subcritical hydrolysates for the production of polyhydroxyalkanoate (PHA) by Haloferax mediterranei

Supratim Ghosh, Rima Gnaim, Semion Greiserman, Ludmila Fadeev, Michael Gozin, Alexander Golberg

Research output: Contribution to journalArticlepeer-review

Abstract

Non-conventional carbon sources, such as macroalgae, are sustainable alternatives for large-scale production of biopolymers. The present study examined macroalgae-derived carbohydrates, as carbon sources for the production of polyhydroxyalkanoates (PHAs) by Haloferax mediterranei. Simulants of the hydrolysates of seven different macroalgal biomasses were prepared and the PHA production was studied. A maximum biomass concentration with maximum PHA content was detected in medium prepared from green macroalgae. The highest cell dry weight and PHA concentrations were 3.8 ± 0.2 g·L −1 and 2.2 ± 0.12 g·L −1 respectively when Haloferax mediterranei was grown in 25% (w/w) of Ulva sp. hydrolysate, at 42 °C temperature and initial pH of 7.2. Poly(3-hydroxy-butyrate-co-3-hydroxyvalerate was the major PHA constituent. The present study demonstrated that Ulva sp. is a promising feedstock for PHA production.

Original languageEnglish
Pages (from-to)166-173
Number of pages8
JournalBioresource Technology
Volume271
DOIs
StatePublished - Jan 2019

Keywords

  • Biopolymer
  • Haloferax mediterranei
  • Macroalgal hydrolysate
  • Polyhydroxyalkanoates
  • Ulva sp.

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