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−2 day−1 was measured at a photon fluence rate of 200 μmol photons m−2 s−1 with addition of 1% CO2 and a temperature of 34 °C. Under these conditions, a maximal biomass value of 232 g m−2 was attained after 33 days of growth. Phycobilin productivity, however, was highest at a lower photon fluence rate of 100 μmol photons m−2 s−1 and reached a phycobilin value of 14 g m−2, a phycobilin content in the biomass of 63 mg g−1 and a phycobilin growth rate of 0.28 g m−2 day−1 for phycocyanin and 0.23 g m−2 day−1 for allophycocyanin. Addition of CO2 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.

Biomass and phycobiliprotein production of Galdieria sulphuraria, immobilized on a twin-layer porous substrate photobioreactor / Carbone, D. A.; Olivieri, G.; Pollio, A.; Melkonian, M.. - In: APPLIED MICROBIOLOGY AND BIOTECHNOLOGY. - ISSN 0175-7598. - 104:7(2020), pp. 3109-3119. [10.1007/s00253-020-10383-8]

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

Carbone D. A.;Olivieri G.;Pollio A.
Co-ultimo
;
2020

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−2 day−1 was measured at a photon fluence rate of 200 μmol photons m−2 s−1 with addition of 1% CO2 and a temperature of 34 °C. Under these conditions, a maximal biomass value of 232 g m−2 was attained after 33 days of growth. Phycobilin productivity, however, was highest at a lower photon fluence rate of 100 μmol photons m−2 s−1 and reached a phycobilin value of 14 g m−2, a phycobilin content in the biomass of 63 mg g−1 and a phycobilin growth rate of 0.28 g m−2 day−1 for phycocyanin and 0.23 g m−2 day−1 for allophycocyanin. Addition of CO2 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.
2020
Biomass and phycobiliprotein production of Galdieria sulphuraria, immobilized on a twin-layer porous substrate photobioreactor / Carbone, D. A.; Olivieri, G.; Pollio, A.; Melkonian, M.. - In: APPLIED MICROBIOLOGY AND BIOTECHNOLOGY. - ISSN 0175-7598. - 104:7(2020), pp. 3109-3119. [10.1007/s00253-020-10383-8]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/826130
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