The research deals with theoretical calculation of the maximal growth rate of green halophilic microalga Dunaliella salina in the conditions of natural illumination at South regions of Russia (Sevastopol city as an example). The calculation is based on the concept that microalgae growth rate is defined as the difference between gross productivity and endogenous biomass expenditure rate. Gross productivity is a function of PAR, absorption coefficient and energy utilization efficiency. For maximal productivity calculation it is suggested that all incident of the pond surface light energy is absorbed by microalgae culture. As far as photobiosynthesis efficiency value depends on illuminance in a complex way, we used average value 5.58 %. The rate of endogenous biomass expenditure was determined based on the value of night losses, which for D. salina was about 5 %.Computations showed that for D. salina maximum biomass gain makes 26 g DW/(m2•day). It is shown that the maximum observed productivity of D. salina in the conditions of natural light in the southern regions of Russia cannot exceed 26 g DW/(m2•day).
ISSN 1995-4301
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