Prediction of Microalgae Growth Kinetics In Semi-Continuous Culture From Batch Culture Experiments

Abstract

due to their extensive application potential in the renewable energy, biopharmaceutical, and nutraceutical industries. For microalgal production, the choice of the photobioreactor, the method of cultivation used, and the harvesting regime adopted (batch, semi-continuous or continuous cultures) are very important. In this work, we examined the growth rate and productivity of a small volume experimental culture in batch and semi-continuous mode. Several microalgae species have been investigated for their potential as value-added products, thus we have chosen two species: green microalga ( Nannochloropsis gaditana ) and a cyanobacterium ( Arthrospira platensis ). This study develops a simple model by which biomass values in semi-continuous operation can be predicted from kinetic growth parameters obtained from a shorter batch experiment. Based on results, biomass concentrations and volumetric productivity in semi-continuous operation were successfully predicted.