What this work is about, in plain words
A mathematical model that shows how to run continuous cultivation of microalgae to get the largest yield in a limited time. The example is the alga Dunaliella salina.
Strictly controlled conditions — constant light, temperature and nutrients — require expensive equipment. In an ordinary greenhouse, conditions change, and the growing time is limited by the season. The authors set out to build a simple model that shows how to organize continuous cultivation under such conditions so that the yield is as large as possible.
The model describes culture growth with a constant flow of medium (a chemostat) in the section of steady, linear growth. The calculations were done using the example of the brackish-water green alga Dunaliella salina.
According to the authors, if growing time is not limited, the final yield depends neither on culture density nor on the dilution rate. If time is limited, then for the largest yield the flow should be switched on at the beginning of the linear growth phase and run at the maximum rate the culture can still withstand. Based on the model, the authors gave recommendations for Dunaliella salina production.
The work provides a simple rule for planning seasonal cultivation.
Limitations. The model is simplified and describes only the section of linear growth. It was tested on one culture. The text of the article is available only as a scan; the explanation was written from the recognized text.