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Table 2 The experimental design and results of the central composite design

From: Phosphate removal combined with acetate supplementation enhances lipid production from water hyacinth by Cutaneotrichosporon oleaginosum

Run Factors Responses
A (KH2PO4, g/L) B (HAc, g/L) Y1 (lipid titer, g/L) Y2 (lipid content, %)
1 0 (− 1) 0 (− 1) 5.4 48.3
2 0.2 (+ 1) 0 (− 1) 3.1 28.8
3 0 (− 1) 15.0 (+ 1) 5.1 57.5
4 0.2 (+ 1) 15.0 (+ 1) 3.5 33.2
5 0 (− 1) 7.5 (0) 6.3 54.3
6 0.2 (+ 1) 7.5 (0) 4.3 32.5
7 0.1 (0) 0 (− 1) 3.8 34.8
8 0.1 (0) 15.0 (+ 1) 3.8 40.0
9 0.1 (0) 7.5 (0) 4.9 37.7
10 0.1 (0) 7.5 (0) 4.7 36.8
11 0.1 (0) 7.5 (0) 4.7 36.7
12 0.1 (0) 7.5 (0) 4.8 37.4
13 0.1 (0) 7.5 (0) 4.7 36.8