Fig. 1From: 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 methodologyStudy of different influential parameters on the lipid production of C. tropicalis ASY2. a Effect of different carbon sources, b Effect of starch concentrations from 10 to 80 g L–1, c Effect of different nitrogen sources d Effect of different pH. The experiment was conducted in a 250 mL Erlenmeyer flask (working volume: 50 mL) with a shaking speed of 150 rpm with different carbon and nitrogen sources, starch concentrations (10 to 80 g L–1), and pH levels (5 to 7). Values are mean (± standard error) (n = 3) and same alphabets in each column are not significantly different from each other within the observation day as determined by DMRT (p ≤ 0.05)Back to article page