Abstract
The paper presents a modified mathematical model of light-dependent chlorophyll concentration in the microalgae biomass. The basic model is based on the concept of biomass as a sum of reserve and structural components. Considering that part of the structural biomass can turn into a reserve, the minimum irradiation parameter (“photosynthesis compensation point”) is added to the basic equation. Verification of the model on experimental data for turbidostat cultures of Tetraselmis viridis and Arthrospira platensis allowed us to evaluate species-specific coefficients. The obtained coefficient values are similar for both species. The share of chlorophyll in structural biomass is about 2 %, the maximum share of structural forms of biomass is 84 %, the economic conversion factor of reserve biomass to structural is 80–90 %, and the maximum specific rate of photosynthesis is 14–20 times higher than the rate of endogenous consumption of biomass.
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