“Mild refining” technologies have enabled optimised sensory properties in products that comply with EU pollutant limits and organic certifications
Nutriswiss, one of the leading refiners of edible oils and fats in Switzerland, has used a special combination of physical refining processes to effectively purify organic oils and optimise their taste. After treatment, the oils are virtually free from process contaminants (3-MCPD, glycidol, trans fatty acids). Mineral oil residues, plasticisers, free fatty acids and other contaminants are effectively reduced while micronutrients are preserved.
As a contract manufacturer, Nutriswiss has refined a wide variety of oils for the food, pharmaceutical and cosmetics industries. Its state-of-the-art processes enable the gentle refining of oils in compliance with European organic guidelines and other certifications such as Demeter, Bioland and BioSuisse.
In this way, oils that would be of limited suitability for further processing or trade due to intense flavours, colouration or exposure to environmental and transport contaminants become safe ingredients. Unlike conventional physical refining at high temperatures which creates process contaminants and destroys valuable micronutrients, the thermal load in “mild refining” processes remains comparatively low. The process is therefore also suitable for sensitive raw materials such as omega-3-rich seed oils like rapeseed or linseed oil, algae oil or other specialty oils.
Gentle physical refining
Contaminants can originate during organic cultivation from exhaust gases, for example, or enter the raw material through contact with machinery and transport circumstances. Mineral oil residues were detected, for instance, during an internal random analysis of various organic rapeseed oils in the Swiss retail market. Although these contaminants were present in “acceptable” concentrations (according to the orientation values for MOH compiled by the German Food Association [Lebensmittelverband Deutschland eV] in August 2021), they were still considered“unwanted.”
With “mild refining” technologies, Nutriswiss has succeeded in purification without the formation of process contaminants such as glycidol and 3-MCPD, for which strict limits will apply from January 2021 according to EU Regulation 2020/1322. Highly pure and sensorially neutral products can thus be produced in a gentle manner.
Michel Burla, managing director of Nutriswiss, commented: “The contract production of high-purity oils in organic quality is a very special addition to our existing range of services. We are proud that we can now meet market demand with certified, purely physical processes.”