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Table 3

Results of the CCD for two responses

Run no.Experimental designResponse removals (%)
coded
COD
Turbidity
m (x1)pH (x2)ExperimentalPredictedResidualExperimentalPredictedResidual
−1 −1 47.5 48.1 −0.6 88.3 88.3 0.0 
−1 57.4 57.8 −0.4 84 83.63 0.37 
−1 49.4 49.8 −0.4 78.6 78.69 −0.01 
49.4 49.7 −0.3 84.7 84.42 0.28 
−1.414 47.5 46.9 0.6 85.8 85.67 0.13 
1.414 54 53.7 0.3 86 86.4 −0.4 
−1.414 55.3 54.7 0.6 84.4 84.6 −0.2 
1.414 50.6 50.2 0.4 78.3 78.37 −0.07 
61 60.48 0.52 96.4 96.38 0.02 
10 60.3 60.48 −0.18 96.4 96.38 0.02 
11 60.5 60.48 0.02 96.4 96.38 0.02 
12 60.6 60.48 0.12 96.3 96.38 −0.08 
13 60 60.48 −0.48 96.4 96.38 0.02 
Run no.Experimental designResponse removals (%)
coded
COD
Turbidity
m (x1)pH (x2)ExperimentalPredictedResidualExperimentalPredictedResidual
−1 −1 47.5 48.1 −0.6 88.3 88.3 0.0 
−1 57.4 57.8 −0.4 84 83.63 0.37 
−1 49.4 49.8 −0.4 78.6 78.69 −0.01 
49.4 49.7 −0.3 84.7 84.42 0.28 
−1.414 47.5 46.9 0.6 85.8 85.67 0.13 
1.414 54 53.7 0.3 86 86.4 −0.4 
−1.414 55.3 54.7 0.6 84.4 84.6 −0.2 
1.414 50.6 50.2 0.4 78.3 78.37 −0.07 
61 60.48 0.52 96.4 96.38 0.02 
10 60.3 60.48 −0.18 96.4 96.38 0.02 
11 60.5 60.48 0.02 96.4 96.38 0.02 
12 60.6 60.48 0.12 96.3 96.38 −0.08 
13 60 60.48 −0.48 96.4 96.38 0.02 
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