APPLICATION OF MICROALGAE CHLORELLA VULGARIS BY LIVESTOCK BREEDING ENTERPRISES

Industrial production of microalgae phytomass from agricultural waste for energy production purposes can solve the internal energy supply and environmental issues in the farm sector. The closed-cycle energy supply scheme is used in the livestock breeding facility to get hot water, feed additives to the cattle diet, biohumus, motor biofuels, and carbon dioxide, which is advisable to use in microalgae cultivation. The article presents a study of the experimental process of microalgae cultivation in a photobioreactor. The study goal was to determine the influence of technological conditions on the productivity of microalgae and obtain initial data for the development of closed cycles of using the energy potential of algamass in the heat and power supply of farm enterprises (e.g. dairy and poultry farms etc.). The authors carried out experiments using a photobioreactor for microalgae cultivation with an intelligent control system. The developed photobioreactor differs from the conventional variants by the pulsating hydrodynamic mode of feeding the nutrient solution. This modification increases the productivity of microalgae cultivation by up to 15%. The cultivation conditions of Chlorella vulgaris microalgae on combined nutrition showed a noticeable increase in crop productivity when adding cattle manure extract in the amount of 30 to 60% (vol.) to the nutrient medium. This factor can be used to design closed cycles of thermal and electrical supply of cattle farms based on third-generation biofuels obtained from microalgae phytomass.

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