The content of nutrients in the biomass of desmodesmus armatus (chod.) Hegew. Та acutodesmus dimorphus (turpin) tsarenko cultivated on the waste water from ras

It was shown the possibility of using the waste water from RAS as a culture medium for Desmodesmus armatus (Chod.) Hegew. and Acutodesmus dimorphus (Turpin) Tsarenko cultivation. The investigated algae was grown on the Fitzgerald's artificial medium number 11 in the modification of Zehnder and Gorham and on the water from RAS (Recirculation Water System), that was standardized with the indicators pH and total mineralization. A gradual increase of the total proteins which reached their peak in the stationary phase of culture growth was noticed during the cultivation of D. armatus and A. dimorphus. The maximum content of total protein was noted on the 40th day of cultivation and was about 50% of the dry weight of both algae. At the same time, 17 proteinogenic amino acids, including 9 replaceable and 8 essential acids, were detected and identified in biomass of two species alga. the quality of the amino acids of algae biomass did not depend on the type of applied nutrient medium. While growing on the waste water from RAS lower productive characteristics of D. armatus та A. dimorphus cultureі were observed, but the mentioned way of cultivation is also more cheaper compared to standard medium. The obtained productive algae cultures characterized by a sufficient amount of protein and a wide range of amino acids and can be used as food objects in aquaculture .