Alternative Methods of Bioactive Compounds and Oils Extraction from Berry Fruit By-Products-A Review

Berry fruit by-products are a source of polyphenol compounds and highly nutritious oils and can be reused to fulfill the requirements of the circular economy model. One of the methods of obtaining polyphenol-rich extracts or oils is extraction. Applying conventional solvent extraction techniques may be insufficient to reach high polyphenol or lipid fraction yields and selectivity of specific compounds. Alternative extraction methods, mainly ultrasound-assisted extraction, pulsed electric field-assisted extraction, microwave-assisted extraction and supercritical fluid extraction, are ways to improve the efficiency of the isolation of bioactive compounds or oils from berry fruit by-products. Additionally, non-conventional techniques are considered as green extraction methods, as they consume less energy, solvent volume and time. The aim of this review is to summarize the studies on alternative extraction methods and their relationship to the composition of extracts or oils obtained from berry waste products.

Automated summary

Berry fruit by-products contain polyphenol compounds and nutritious oils, which can be obtained through extraction methods. Conventional solvent extraction techniques may not be sufficient, and alternative methods such as ultrasound-assisted extraction, pulsed electric field-assisted extraction, microwave-assisted extraction, and supercritical fluid extraction can improve efficiency and are considered environmentally friendly.