Abstract
The issues of plastic waste arise owing to the global increase in plastic demand, which has surpassed the plastic recycling rate. Microalgae have become a sustainable feedstock to produce biodegradable thermoplastic starch because of their high yield, high photosynthetic efficiency, ease of cultivation and eco-friendliness. This research was conducted to determine the efficiency of different methods for starch extraction and recovery. Starch was extracted through ultrasonication, bead-beating and physicochemical methods and then separated, dried and analysed with a Megazyme total starch analysis kit. Of these tested methods, the physicochemical method (90 °C, 30 min) was the most efficient method for starch extraction, where the starch increment was 323.05% ± 32.03% relative to the control. However, the bead-beating method was the most efficient method when starch recovery was conducted on Chlorella salina cells, exhibiting the highest increment (96.60% ± 2.73%). Therefore, the physicochemical and bead-beating methods were the viable methods for enhancing the efficiency of starch extraction and recovery, respectively.
Article Highlights
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Physicochemical method (90 °C, 30 min) was the most efficient method for starch extraction.
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Bead-beating method was the most efficient method in starch recovery (96.60% ± 2.73%) from Chlorella salina cells
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The physicochemical and bead-beating methods were the ideal methods for starch extraction and recovery, respectively
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Acknowledgements
The author (Wong, P.Y.) is grateful to his supervisor (Dr. Lee Chee Keong) for his encouragement, advice and patient guidance throughout the whole research project. The authors would like to thank the School of Industrial Technology, USM for allowing her to use the available facilities and equipment in the laboratory throughout the study. The author (Lee, C.K.) would like to express his greatest gratitude to USM for giving him a USM Research Universiti grant (1001/PTEKIND/811273).
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Wong, P.Y., Lai, Y.H., Puspanadan, S. et al. Extraction of Starch from Marine Microalgae, Chlorella salina: Efficiency and Recovery. Int J Environ Res 13, 283–293 (2019). https://doi.org/10.1007/s41742-019-00173-0
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DOI: https://doi.org/10.1007/s41742-019-00173-0