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Production of Coconut Protein Powder from Coconut Wet Processing Waste and its Characterization

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Abstract

Virgin coconut oil (VCO) has been gaining popularity in recent times. During its production, byproducts such as coconut skim milk and insoluble protein are obtained which are underutilized or thrown away to the environment at present. This study deals with utilization of these byproducts to obtain a value-added product, namely, coconut protein powder. When coconut milk was subjected to centrifugation, three phases, namely, fat phase (coconut cream), aqueous phase (coconut skim milk), and solid phase (insoluble protein) were obtained. The coconut skim milk and insoluble protein were mixed and homogenized before spray drying to obtain a dehydrated protein powder. The proximate analysis of the powder showed high protein content (33 % w/w) and low fat content (3 % w/w). Protein solubility was studied as a function of pH and ionic content of solvent. Functional properties such as water hydration capacity, fat absorption capacity, emulsifying properties, wettability, and dispersibility of coconut protein powder were evaluated along with morphological characterization, polyphenol content, and color analysis. Coconut protein powder has shown to have good emulsifying properties and hence has potential to find applications in emulsified foods. Sensory analysis showed high overall quality of the product, indicating that coconut protein powder could be a useful food ingredient.

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Acknowledgements

Authors wish to thank the Director, CFTRI, for the encouragement and infrastructural facilities at the institute. Thanks are also due to Dr. Maya Prakash for sensory analysis. The authors, Aduja Naik and SN Raghavendra, acknowledge UGC and CSIR, Government of India for providing the UGC-SRF and CSIR-SRF fellowship, respectively.

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Authors and Affiliations

  1. Department of Food Engineering, Central Food Technological Research Institute (CFTRI), Council of Scientific and Industrial Research, Mysore, 570 020, India

    Aduja Naik, S. N. Raghavendra & K. S. M. S. Raghavarao

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  1. Aduja Naik
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  2. S. N. Raghavendra
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  3. K. S. M. S. Raghavarao
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Correspondence to K. S. M. S. Raghavarao.

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Naik, A., Raghavendra, S.N. & Raghavarao, K.S.M.S. Production of Coconut Protein Powder from Coconut Wet Processing Waste and its Characterization. Appl Biochem Biotechnol 167, 1290–1302 (2012). https://doi.org/10.1007/s12010-012-9632-9

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  • DOI: https://doi.org/10.1007/s12010-012-9632-9

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