Journal
BIORESOURCE TECHNOLOGY
Volume 212, Issue -, Pages 342-347Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.04.035
Keywords
Cyanobacteria; Polyhydroxybutyrate; PHB; Carbon dioxide; Energy
Funding
- Ratchadaphiseksomphot Endowment Fund of Chulalongkorn University [RES560530096-AM]
- Asahi Glass Foundation, Japan
- 90th Anniversary of Chulalongkorn University Fund (Ratchadaphiseksomphot Endowment Fund)
- Thailand Research Fund [IRG5780008]
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The cellular PHB content was determined in 137 strains of cyanobacteria representing 88 species in 26 genera under six photoautotrophic nutrient conditions. One hundred and thirty-four strains were PHB producers. The PHB contents of these 134 strains were subtle under normal growth condition, but were significantly increased in 63 strains under nitrogen deprivation (-N), a higher frequency than with phosphate and/or potassium and all-nutrient deprivation. A high PHB accumulation was not associated with any particular evolutionary groups, but was strain specific. The filamentous Calothrix scytonemicola TISTR 8095 produced 356.5 +/- 63.4 mg/L PHB under-N from a biomass of 1396.6 +/- 66.1 mg/L, giving a PHB content of 25.4 +/- 3.5% (w/w dry weight). This PHB productivity is equivalent to the CO2 consumption of 729.2 +/- 129.8 mg/L. The maximum energy conversion from solar energy to PHB obtained by C. scytonemicola TISTR 8095 was 1.42 +/- 0.30%. (C) 2016 Elsevier Ltd. All rights reserved.
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