microalgae, geothermal water, biomass, nutrients, biofuel
Little, if any, published data exist on growing algae in geothermal water. Geothermal water is a source of water rich in nutrient content and can be used for biofuel production. In this study geothermal water from the Aggie Mountain site of New Mexico State University was used for growing Chlorella sorokiniana species of microalgae (CS-101). To find optimum light period and best nutrient for maximum biomass production; a factorial experiment with CRD arrangement was designed with different combination of lights (12:12, 16:8, and 24:0) and three different sources of nutrients as growth media (geothermal water, Bold’s Basal Medium and ½ BBM and ½ geothermal water). The results indicated growing algae in ½ geothermal and ½ BBM and applying 16:8 light cycle lead to highest biomass productivity. The pH in BBM increased from 7 to 10.42 and was significantly higher from geothermal water (9.02) and ½ geothermal and ½ BBM (9.25).