.These results highlight the inefficiency of sun drying process in comparison to oven or freeze drying. In addition, the longer drying period with sun drying exerts huge land requirement for complete drying in comparison to other processes, and which might be a constraint during full scale application. Widjaja et al. (2009) also reported oven drying at 60 C and freeze drying to provide best lipid extraction from Chlorella vulgaris. Careful selection of drying methods is important because oven and freeze drying are both energy intensive processes (Guldhe et al., 2014) and may have higher operating costs during long term full scale application. However, higher lipid yields were achieved by these two methods in this study, and which might also be an important factor to selecting the most appropriate drying method.