Sustainable fish oil extraction from catfish visceral biomass: A comparative study between high-shear homogenization and high-frequency ultrasound on wet rendering process

Jaydeep, Dave and Nishant, Kumar and Ashutosh, Upadhyay and Daniel Tua, Purba and Tanaji, Kudre and Pikunthong, Nukthamna and Sampatee, Sa-nguanpuag and Ali Muhammed Moula, Ali and Sri Charan Bindu, Bavisetty (2025) Sustainable fish oil extraction from catfish visceral biomass: A comparative study between high-shear homogenization and high-frequency ultrasound on wet rendering process. Foods and Raw Materials, 13 (1). pp. 94-106.

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Abstract

Traditional wet rendering leads to the degradation of polyunsaturated fatty acids in fish oil. Therefore, we combined this method with high-shear homogenization and high-frequency ultrasound to extract oil from Clarias magur visceral biomass. This way, we aimed to achieve higher oil yield, shorter extraction times, and a better preservation of polyunsaturated fatty acids. High-shear homogenization and high-frequency ultrasound increased the oil yields by 9.17 and 10.55%, respectively, compared to traditional wet rendering. The oil quality was also improved, with lower acid and peroxide values. Scanning electron microscopy confirmed enhanced cell disruption for increasing the oil extraction efficiency. Fourier transfer infrared spectroscopy also proved the efficacy of homogenization and ultrasound pretreatment in enhancing the extraction of polyunsaturated fatty acids from C. magur visceral biomass. Their content showed a significant variation among different extraction methods. Specifically, the high-frequency ultrasound method resulted in a notable 15.1% increase, while the high-shear homogenization method de- monstrated a significant 13.3% increase, compared to the wet rendering method (control). The oil extracted by the high-frequency ultrasound method demonstrated a 7.5% increase in eicosatetraenoic acid and a 11.7% increase in docosahexaenoic acid, as compared to the oil obtained from the control method. High-shear homogenization and high-frequency ultrasound shortened the extraction time and reduced the temperature requirements for oil extraction from wet biomass. These techniques have potential for efficient fish oil extraction, valuable in the healthcare and food industries.

Item Type:	Article
Uncontrolled Keywords:	Catfish waste management, wet rendering, high-shear homogenization, high-frequency ultrasound, polyunsaturated fatty acids, lipids
Subjects:	600 Technology > 08 Food technology > 16 Nutritive value > 07 Waste utilization 600 Technology > 08 Food technology > 19 Lipids-oils/fats 600 Technology > 08 Food technology > 28 Meat, Fish & Poultry > Fish
Depositing User:	Somashekar K S
Date Deposited:	06 Mar 2025 06:31
Last Modified:	06 Mar 2025 06:31
URI:	http://ir.cftri.res.in/id/eprint/19222

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