Nowadays the environmental concerns and the limited availability of fossil resources have resulted in the development of bioeconomy and biorefineries. It is crucial to adapt production processes within this context. In Ireland cheese whey and derivatives are some of the main wastes generated by the industry. This article aims at the possibility of using this dairy waste for production of interesting biochemicals and compounds using a microbe known as Kluyveromyces marxianus, which is a yeast adapted to live in milk.