Microalgae Growth under Mixotrophic Condition Using Agro-Industrial Waste: A Review

Microalgae has a great potential to produce biofuels and bioproduct but the cost is still too high mainly due to the biomass production. Mixotrophic cultivation has been pointed as microalgae cultivation mode for biomass/bioenergy production with lower cost and able to make remediation of organic waste. The proposals of this work was to make a review of microalgae growth under mixotrophic condition using agro-industrial waste. Agro-industrial by-products and wastes are of great interest as cultivation medium for microorganisms because of their low cost, renewable nature, and abundance. However biotechnological technologies are necessary to develop the production of microalgae on a large scale.

The Influence of Glucose on Growth and Lipid Production under Heterotrophic and Mixotrophic Conditions for Monoraphidium sp. FXY-10

The impact of glucose on the growth under heterotrophic and mixotrophic conditions for Monoraphidium sp. FXY-10 as well as its lipid content was investigated through the Andrew equation. The results demonstrated that the subsaturation constant of Monoraphidium sp. FXY-10 under heterotrophic condition to glucose was smaller than that of Monoraphidium sp. FXY-10 under mixotrophic condition, indicating that Monoraphidium sp. FXY-10 is more sensitive to glucose under heterotrophic condition. Furthermore, the biomass productivity, lipid productivity and lipid content of Monoraphidium sp. FXY-10 all reached the peak at 10 g L-1 of glucose concentration under both heterotrophic and mixotrophic conditions. Compared with other Chlorella sp., the Monoraphidium sp. FXY-10 represented higher lipid productivity (131.79 mg L-1 d-1).