Fig. 3. The effects of the extraction time1, extraction temperature2, and hexane/
methanol ratio3 on the recovery of microalgae oil. 1The experiments were
performed under the following conditions: cake weight, 2 g; amount of methanol,
4 mL; extraction temperature, 25 C; hexane-to-methanol ratio, 2:1; mixing speed,
600 rpm. 2The experiments were performed under the following conditions: cake
weight, 2 g; amount of methanol, 4 mL; hexane-to-methanol ratio, 2:1; mixing
speed, 600 rpm; extraction time, 80 min. 3The experiments were performed under
the following conditions: cake weight, 2 g; amount of methanol, 4 mL; extraction
temperature, 45 C; mixing speed, 600 rpm; extraction time, 80 min.