Metabolic adaptation of carotenogenic yeasts to nutritional stress induced by selected wastes of the food industry

This bachelor thesis deals with the production of carotenoids and lipids by selected strains of carotenogenic yeasts cultivated on waste substrates of the food industry. The production properties of the yeast strains Sporidiobolus pararoseus, Sporidiobolus metaroseus, Cystofilobasidium macerans, Rhodotorula mucilaginosa, Rhodotorula kratochvilovae and Rhodosporidium toruloides were studied. The cultures were cultivated by using waste products of food industry: waste frying oil, coffee oil which was obtained by extraction from coffee grounds and waste animal fat from rendering plants. The work consists of two main parts. The theoretical part describes the individual genera of yeasts, monitored metabolites, waste products and methods of analysis of monitored metabolites. The experimental part is focused on the processing of used waste substrates, cultivation of yeasts, acquisition and processing of biomass and analysis of metabolites. Rhodosporidium toruloides and Sporidiobolus pararoseus strains were the most suitable for the production of carotenoids on waste substrates. The highest production of lipid substances was measured in the strain Sporidiobolus pararoseus