Enhancement in phycobiliprotein accumulation in Aphanothece sp. using different carbon sources and flashing frequency

Parsaeimehr, Ali; Ahmed, Ifti Iftekhar; Deumaga, Myriam Loretta Kouemo; Hankoua, Bertrand; Ozbay, Gulnihal

doi:10.1016/j.algal.2022.102805

Cited by 3 publications

(1 citation statement)

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“…There were no significant differences in phycocyanin content between the acetate supplemented group and the control group. Previous research has reported that the accumulation of PC in diverse species was promoted in the mixotrophic condition [ 32 - 34 ]. This discrepancy might be due to the result of a complex PC accumulation regulation mechanism caused by the difference in the types of carbon sources [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

Mixotrophic Cultivation of a Native Cyanobacterium, Pseudanabaena mucicola GO0704, to Produce Phycobiliprotein and Biodiesel

Kim

Bae

Kim

et al. 2022

J. Microbiol. Biotechnol.

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Global warming has accelerated in recent decades due to the continuous consumption of petroleum-based fuels. Cyanobacteria-derived biofuels are a promising carbon-neutral alternative to fossil fuels that may help achieve a cleaner environment. Here, we propose an effective strategy based on the large-scale cultivation of a newly isolated cyanobacterial strain to produce phycobiliprotein and biodiesel, thus demonstrating the potential commercial applicability of the isolated microalgal strain. A native cyanobacterium was isolated from Goryeong, Korea, and identified as Pseudanabaena mucicola GO0704 through 16s RNA analysis. The potential exploitation of P. mucicola GO0704 was explored by analyzing several parameters for mixotrophic culture, and optimal growth was achieved through the addition of sodium acetate (1 g/l) to the BG-11 medium. Next, the cultures were scaled up to a stirred-tank bioreactor in mixotrophic conditions to maximize the productivity of biomass and metabolites. The biomass, phycobiliprotein, and fatty acids concentrations in sodium acetate-treated cells were enhanced, and the highest biodiesel productivity (8.1 mg/l/d) was achieved at 96 h. Finally, the properties of the fuel derived from P. mucicola GO0704 were estimated with converted biodiesels according to the composition of fatty acids. Most of the characteristics of the final product, except for the cloud point, were compliant with international biodiesel standards [ASTM 6761 (US) and EN 14214 (Europe)].

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