Biomass and phycobiliprotein production of Galdieria sulphuraria, immobilized on a twin-layer porous substrate photobioreactor.

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ID: 97521
2020
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Abstract
The extremophile red alga Galdieria sulphuraria was successfully grown immobilized in a twin-layer porous substrate bioreactor (TL-PSBR). A maximal biomass growth rate of 10 g dry weight m day was measured at a photon fluence rate of 200 μmol photons m s with addition of 1% CO and a temperature of 34 °C. Under these conditions, a maximal biomass value of 232 g m was attained after 33 days of growth. Phycobilin productivity, however, was highest at a lower photon fluence rate of 100 μmol photons m s and reached a phycobilin value of 14 g m, a phycobilin content in the biomass of 63 mg g and a phycobilin growth rate of 0.28 g m day for phycocyanin and 0.23 g m day for allophycocyanin. Addition of CO was essential to enhance growth and phycobilin production in G. sulphuraria and further optimization of the cultivation process in the TL-PSBR appears possible using a multi-phase approach, higher growth temperatures and optimization of nutrient supply. It is concluded that autotrophic cultivation of G. sulphuraria in a TL-PSBR is an attractive alternative to suspension cultivation for phycobilin production and applications in bioremediation.
Reference Key
carbone2020biomassapplied Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Carbone, Dora Allegra;Olivieri, Giuseppe;Pollio, Antonino;Melkonian, Michael;
Journal Applied microbiology and biotechnology
Year 2020
DOI
10.1007/s00253-020-10383-8
URL
Keywords
biomass phycocyanin extremophile organism galdieria sulphuraria twin layer

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