Analysis of growth and lipid production characteristics of Chlorella vulgaris Chlorella vulgaris in artificially constructed consortia with symbiotic bacteria

摘要

The aim was to study the effect of artificially constructed consortia of microalgae‐bacterial symbionts on growth and lipid production by Chlorella vulgaris ( C. vulgaris ), as well as the inter‐relationship between microalgae and bacterial in a photoautotrophic system. The results showed that compared to an axenic culture of C. vulgaris , H1 co‐culture system (axenic C. vulgaris ‐ Stenotrophomona smaltophilia ) had the strongest effect on the C. vulgaris growth. The biomass, specific growth rate and maximum productivity of C. vulgaris were increased by 21.9, 20.4, and 18%, respectively. The bacteria in co‐culture system had a significant effect on the accumulation of lipid and fatty acid components of C. vulgaris : the content of lipid was increased by 8.2–33.83%, and the components of the saturated fatty acids and oleic acids also had an obvious improvement. The results indicate that the microalgae‐bacterial co‐culture system can improve microalgal biomass and the quality of biodiesel.