earticle

영어

Biodiesel production from microalgae has been recently expected to replace the petroleum-based energy sources owing to its high areal productivity and lipid contents. However, large-scaled algae cultivation for biodiesel production should be significantly improved to compete with the cost of present fossil-based energy. In order to reduce the input cost for microalgal cultivation, we investigated the utilization of blended wastewaters taken from domestic and livestock wastewater treatment plants (WWTP). A Chlorella species isolated from Nacdong River effectively utilized the nutrients dissolved in the blended wastewaters. After 10 days cultivation under 200 μmol/m2/s cool-white fluorescent light and 25±1 ℃, significantly high maximum biomass production of c.a. 5.0 g-dry cell weight/L was obtained from the combined wastewater of a domestic WWTP influent and the livestock WWTP effluent without any pretreatment of those wastewaters. The optimal concentration range of the total nitrogen was 100-200 mg/L. These results demonstrated that blended wastewaters would be utilized for mass cultivation of microalgae as both water and nutrient sources.