Fig. 2

Lipid content (a) and lipid productivity (b) for the whole cultivation period of Chlorella sorokiniana SDEC-18 cells grown in BG11 and seawater supplemented with different volume percentages (0, 1, 3, 5, 8, and 15%) of anaerobically digested effluent from kitchen waste. *Data for the same growth stage followed by different letters are significantly different by Duncan’s test at p < 0.05