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Valorization of Rice Bran Gums: An Untapped Source of Natural Phospholipids

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Abstract

One of the major by-products of the rice bran oil refining industry is rice bran gums (RBG). It is considered a waste product because it hardly fetches any revenue. However, the major component of RBG is phospholipids and the demand for phospholipids has seen steep rise, especially for its use in COVID-19 vaccines. Though soyabean and egg lecithin are the major sources of phospholipids, industries are striving for newer sources. RBG can be an alternative source. Presence of bran fines, darker colour, and relatively low quantity of phosphatidylcholine (PC) in crude RBG, are the major hindrances for its widespread applications. The primary question was whether the crude RBG can be valorized to be a source of phospholipids for use in food, cosmetics and pharmaceutical industries. Present work focuses on bleaching of crude RBG and preparation of powdered rice bran lecithin. Appreciable colour reduction was observed with sodium chlorite as bleaching agent. Furthermore, PC-enrichment of RBG was attempted for enhanced applicability in nutraceutical and pharmaceutical products. HPLC analysis showed PC enrichment of more than 50% under specific conditions of solvent used, solid-to-solvent ratio, time, and temperature. These observations are the first of its kind with regard to RBG.

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Acknowledgements

The authors acknowledge DBT-BIRAC for providing a DBT-BIRAC (BT/SBIRI/1572/36/18) grant. Olivia Dhara also acknowledges the Council of Scientific and Industrial Research (CSIR), New Delhi for providing the Senior Research Fellowship. The authors sincerely thank the Director, CSIR-IICT (Ms No. IICT/Pubs./2023/227) for providing all the required facilities.

Funding

This study was funded by Biotechnology Industry Research Assistance Council (BIRAC), Department of Biotechnology (DBT), Govt. of India, New Delhi (Grant No. DBT-BIRAC (BT/SBIRI/1572/36/18).

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Authors and Affiliations

  1. Department of Oils, Lipid Science & Technology, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad, 500007, India

    Olivia Dhara, J. R. C. Reddy, Anjaneyulu Eanti, M. S. L. Karuna & Pradosh Prasad Chakrabarti

  2. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India

    Olivia Dhara, J. R. C. Reddy, M. S. L. Karuna & Pradosh Prasad Chakrabarti

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  1. Olivia Dhara
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  2. J. R. C. Reddy
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  3. Anjaneyulu Eanti
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  4. M. S. L. Karuna
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  5. Pradosh Prasad Chakrabarti
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by OD. Conceptualization was performed by JRCR, MSLK, and PPC. Part of the analytical data curation was performed by AE. Funding acquisition, Resources, and Supervision was performed by PPC. The first draft of the manuscript was written by OD and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Pradosh Prasad Chakrabarti.

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Dhara, O., Reddy, J.R.C., Eanti, A. et al. Valorization of Rice Bran Gums: An Untapped Source of Natural Phospholipids. Waste Biomass Valor 15, 2937–2945 (2024). https://doi.org/10.1007/s12649-023-02336-9

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  • DOI: https://doi.org/10.1007/s12649-023-02336-9

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