Document Type

Article

Disciplines

1.6 BIOLOGICAL SCIENCES

Publication Details

https://www.sciencedirect.com/science/article/pii/S221192642300276X

Xianglu Zhu, Laura Healy, Rahel Suchintita Das, M.L. Bhavya, Shanmugapriya Karuppusamy, Da-Wen Sun, Colm O'Donnell, Brijesh K. Tiwari, Novel biorefinery process for extraction of laminarin, alginate and protein from brown seaweed using hydrodynamic cavitation, Algal Research, Volume 74, 2023.

https//doi.org/10.1016/j.algal.2023.103243

Abstract

This paper investigates a novel biorefinery process designed for the extraction of valuable compounds from brown seaweed Alaria esculenta using hydrodynamic cavitation (HDC). A two-stage process was developed to maximize the value of seaweed biomass by control of the processing time, solvent selection and HDC conditions to extract laminarin, alginate, mannitol and protein in a cascading manner, maximizing the value of seaweed biomass. After the first extraction stage using 0.1 M HCl, membrane ultrafiltration was employed to separate laminarin and mannitol. The purity of the laminarin and mannitol obtained was up to 86.57 ± 3.72 % and 40.49 ± 2.78 % with recovery rates of 55.55 ± 3.10 % and 75.90 ± 4.49 %, respectively. Ethanol precipitation was then carried out to recover sodium alginate after the second extraction stage process using 2 % Na2CO3 (w/v). The sodium alginate purity extracted by employing HDC twice (HDC-HDC) was 88.98 ± 4.70 % with a recovery rate of 65.13 ± 5.14 %. The remaining residue after the biorefinery process had an enriched protein content of 17.19 ± 1.33 %. This study demonstrates that an HDC-assisted biorefinery process can significantly (P < 0.05) reduce energy consumption. The laminarin extracts were further characterised by antioxidant activity, antiinflammation activity, FT-IR, and anti-microbial activity. The laminarin extracted in this study was shown to have identical bioactive activities as the commercially available samples.

DOI

https//doi.org/10.1016/j.algal.2023.103243

Funder

The authors would like to acknowledge the following fundings that support this study including UCD-CSC Scholarship Scheme supported by University College Dublin (UCD) and China Scholarship Council (CSC), the BlueBio ERA-NET COFUND on the Blue Bioeconomy – Unlocking the Potential of Aquatic Bioresources and The European Commission (AquaTech4Feed, Grant no. 2819ERA01M) within the Horizon 2020 programme, and also Enterprise Ireland’s Career-FIT PLUS: Career Development Fellowship in the National Technology Centre Programme (co-funded by Marie Skłodowska-Curie Actions) under grant number MF/2021/0195 and MSCA20210184

Creative Commons License

Creative Commons Attribution-Share Alike 4.0 International License
This work is licensed under a Creative Commons Attribution-Share Alike 4.0 International License.

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