Conclusions

This research aimed at enrichment, growth, and accumulation of biopolymer storage compounds using a chemostat bioreactor operated at different NLRs. Chlorella vulgaris, and Chlorella sorokiniana, the enriched species of this study stored lipids over starch under the continuous growth conditions. Hence, this method is a high throughput screening to select the most suitable microalgae species for lipids production. These findings can be used in large scale microalgae cultivation. Future studies are required to optimize lipids productivity by adjusting cultivation parameters like dilution rate, pH, temperature and light intensity for simultaneous microalgae enrichment and growth, lipid production and biological nutrient removal.