The influence of PAR irradiance on yield growth of Chlorella microalgae

The experiment indicated the influence of different PAR irradiance conditions on biomass growth of Chlorella vulgaris Beijer stock culture. The absorption spectrum of suspension was evaluated with spectrophotometer SF-256 UVI LOMO Photonika. In this work, effects of LED lamps with various radiant powers on yield gain were compared by analyzing the relation between cells concentration increase and time. It was concluded, that light is the most important factor influencing growth and cells development, as well as nutrient solution, temperature and carbon dioxide provision.