The Influence of Various pH Values on <i>Monoraphidium</i> sp. FXY-10 Growth and Lipid Parameters in Autotrophic and Heterotrophic Conditions

The influence of pH on Monoraphidium sp. FXY-10 growth, lipid content, lipid yield, biomass yield, and fatty acid composition is studied in autotrophic and heterotrophic conditions. The results reveal that Monoraphidium sp. FXY-10 can grow better in an acidic environment. Under autotrophic and heterotrophic conditions, the culture time is 37 and 9 day, respectively. And the maximum biomass of algal cells is 32 and 367mg/l/d with the lipid content in autotrophic and heterotrophic conditions reached to 49% and 39%, respectively, with high biomass yield, lipid yield, the saturated fatty acid and monounsaturated fatty acid under heterotrophic condition, proving that the algal cells are a viable material for the production of biodiesel.