Valorization of tomato by-products: influence of ohmic heating process on polyphenols extraction

Abstract

[Excerpt] Introduction: Tomato based products is one of the worldwide major agroindustrial sectors generating substantial amounts of wastes, with high economic and environmental costs[1]. These agroindustrial by-products e.g. skins and pulp remnants, are rich in bioactive compounds such as polyphenols [2–4]. Current extraction treatments, besides representing environmental hazards, may cause these by-products bioactive compounds degradation, promote toxicity, and reduce biological properties and health benefits, thus hampering their added value. Therefore, there is a growing interest in alternative extraction technologies, such as the case of Ohmic Heating (OH), an environmentally-friendly technique (i.e. use of electrical energy) [5]. This study aimed to optimize the extraction of phenolic compounds, antioxidants and carotenoids of tomato wastes through ohmic heating, as an alternative extraction technology. [...]