Improvement of cell growth in green algae Chlamydomonas reinhardtii through co-cultivation with yeast Saccharomyces cerevisiae

Co-utilization of microalgae and heterotrophic microorganisms improves wastewater treatment efficiency

“…These functions are associated with yeast cell growth. Previous studies have reported that in co-culture, competition for microbial growth occurs and microbial growth is inhibited (Karitani et al, 2024a). Therefore, S. cerevisiae SH-4 growth potential may have been reduced in wastewater treatment combined with C. reinhardtii NIES-2238 in the present study.…”

“…4b). Previous studies have reported that when microalgae and heterotrophic microorganisms are co-cultured, light is shielded by heterotrophic microorganisms, and the photosynthetic activity of microalgae is suppressed (Karitani et al, 2024a; Yamada et al, 2023). In the present study, the photosynthetic activity of microalgae could have been suppressed by the co-utilization of microorganisms for wastewater treatment.…”

“…Therefore, the co-cultivation of microalgae and heterotrophic microorganisms is attracting attention to improve the growth of microalgae without the aeration of high-concentration carbon dioxide (Naseema Rasheed et al, 2023; Ray et al, 2022). Previous studies reported that the growth rate of microalgae increases under dilute CO 2 atmospheric conditions when C. reinhardtii and Saccharomyces cerevisiae are co-cultured (Karitani et al, 2024a; Karitani et al, 2024b). Co-cultivation of C. reinhardtii and Escherichia coli promotes microalgal growth (Yamada et al, 2023).…”