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Table 8 Confirmation experiments of CCD (RSM) model for Rhodobacter capsulatus -PK (SS-8) and enzymatically hydrolyzed WS

From: Photo-biohydrogen production potential of Rhodobacter capsulatus- PK from wheat straw

X1(h) X2(mg) X3(g) H2production (ml)
  actual predicted residual error (%)
48 300 2.00 708.34 710.25 -1.91 0.27
24 300 2.50 611.23 605.61 5.62 0.92
48 400 2.00 673.12 666.31 6.81 1.01
48 300 2.50 651.05 649.55 1.50 0.23
50 320 2.20 697.47 698.94 -1.47 0.21
40 280 1.70 683.09 681.15 1.94 0.28
  1. X1 = inoculum age;
  2. X2 = nitrogen content;
  3. X3 = substrate loading.