et al., M. (2025). Optimizing Growth Conditions and Polyhydroxybutyrate Production in Spirulina platensis and Haematococcus pluvialis for Sustainable Bioplastic Development. Egyptian Journal of Aquatic Biology and Fisheries, 29(2), 1607-1629. doi: 10.21608/ejabf.2025.420706
Morsy et al.. "Optimizing Growth Conditions and Polyhydroxybutyrate Production in Spirulina platensis and Haematococcus pluvialis for Sustainable Bioplastic Development". Egyptian Journal of Aquatic Biology and Fisheries, 29, 2, 2025, 1607-1629. doi: 10.21608/ejabf.2025.420706
et al., M. (2025). 'Optimizing Growth Conditions and Polyhydroxybutyrate Production in Spirulina platensis and Haematococcus pluvialis for Sustainable Bioplastic Development', Egyptian Journal of Aquatic Biology and Fisheries, 29(2), pp. 1607-1629. doi: 10.21608/ejabf.2025.420706
et al., M. Optimizing Growth Conditions and Polyhydroxybutyrate Production in Spirulina platensis and Haematococcus pluvialis for Sustainable Bioplastic Development. Egyptian Journal of Aquatic Biology and Fisheries, 2025; 29(2): 1607-1629. doi: 10.21608/ejabf.2025.420706
Optimizing Growth Conditions and Polyhydroxybutyrate Production in Spirulina platensis and Haematococcus pluvialis for Sustainable Bioplastic Development
Bioplastics are increasingly being recognized as a viable substitute for conventional plastics across a broad spectrum of applications. Microalgae, such as Spirulina platensis (Geitler) and Haematococcus pluvialis (Flotow), are emerging as sustainable sources for bioplastic production, aligning with the principles of a circular bioeconomy. This study employed response surface methodology (RSM) to optimize growth conditions for bioplastic-producing microalgae, Spirulina platensis and Haematococcus pluvialis, with the aim of maximizing polyhydroxybutyrate (PHB) accumulation. The results showed that aerated Zarrouk's medium optimized S. platensis growth at 20°C, pH 8, 5000 lux, and 0.025 M salinity, while medium growth was optimized at 30°C, pH 9, 5000 lux, and 0.3 M salinity. In contrast, aerated BG11 medium optimized H. pluvialis growth at 26.5°C, pH 7.9, 6500 lux, and 0 M salinity, with medium growth optimized at 27.5°C, pH 5.5, 3500 lux, and 0.2 M salinity. Notably, H. pluvialis under medium growth conditions yielded the highest PHB content (61.04±0.3mg/ g), whereas S. platensis under maximum growth conditions yielded the lowest PHB content (20.43±0.56mg/ g). Furthermore, PHB production was significantly enhanced for H. pluvialis by the addition of sodium acetate in phosphorus-deficient media, reaching a maximum of 197.58±0.6mg/ g with 2g/ L acetate.
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