Fig. 8From: Bioconversion of sago processing wastewater into biodiesel: Optimization of lipid production by an oleaginous yeast, Candida tropicalis ASY2 and its transesterification process using response surface methodology3D surface plots for the response FAME yield of C. tropicalis ASY2 yeast biomass in transesterification process. a Effect of methanol vs. catalyst concentration; b Effect of methanol vs. time; c Effect of catalyst concentration vs. time. The interactive effect is represented with the color ranging from blue to red (blue, green, red); blue is least significant, green is moderately significant, and red is highly significantBack to article page