Nannochloropsis and Isochrysis microalgae represent a raw material that can be used for energy production. The aim of this research was to describe the cultivation of the Nannochloropsis and Isochrysis microalgae in different technological systems and to determine their chemical and physical characteristics using laboratory methods for a preliminary assessment of the energy potential for the production of biogas and biodiesel. Analysing the Nannochloropsis samples, the average values of water content was measured at 95.28 %, ash content at 76.5 %, fat content at 0.3271 % were determined. The solution salinity of the Nannochloropsis samples was measured at 37.114 ppt. The chemical oxygen consumption (COD) of microalgae residues after biodiesel production was determined, which was 1244 mg/L. Through the analysis of the Isochrysis galbana samples, the average values of water content was measured at 95.42 %, ash content at 77.91 %, fat content at 0.3395 % were determined. The solution salinity of the I. galbana samples was measured at 36,516 ppt. The chemical oxygen consumption (COD) of microalgae residues after biodiesel production was determined, which was 999 mg/L. It can be concluded that there is potential in the production of biofuel from microalgae, and that integrated circular production is possible. However, it is necessary to optimize the production system so that yields are as high as possible and production costs are as low as possible.