Supplementary data for

Treatment of Wet FGD Wastewater by a Modified Chemical Precipitation Method Usinga Solid Powder Reagent

Yong Kang 1, Jia Lu 1,2,Jing Guo 1,2

1 School of ChemicalEngineeringand Technology, Tianjin University, Tianjin 300072, China

2Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China

Table S1The ANOVA for RHM

Item / Degree of freedom / Sum of squares / Mean square / F statistic / PF
Model / 9 / 291.82 / 32.42 / 13.78 / 0.0002
Residual error / 10 / 23.53 / 2.35 / / / /
Total / 19 / 315.36 / / / / / /
x1 / 1 / 87.11 / 87.11 / 37.02 / 0.0001
x2 / 1 / 25.58 / 25.58 / 10.87 / 0.0081
x3 / 1 / 0.11 / 0.11 / 0.049 / 0.8300
x1x2 / 1 / 0.15 / 0.15 / 0.065 / 0.8033
x1x3 / 1 / 157.62 / 157.62 / 66.98 / < 0.0001
x2x3 / 1 / 0.19 / 0.19 / 0.080 / 0.7826
x12 / 1 / 10.64 / 10.64 / 4.52 / 0.0594
x22 / 1 / 2.69 / 2.69 / 1.14 / 0.3101
x32 / 1 / 6.90 / 6.90 / 2.93 / 0.1177

Table S2The ANOVA for RF

Item / Degrees of freedom / Sum of squares / Mean square / F statistic / PF
Model / 9 / 848.62 / 94.29 / 53.71 / < 0.0001
Residualerror / 10 / 17.56 / 1.76 / / / /
Total / 19 / 866.18 / / / / / /
x1 / 1 / 693.66 / 693.66 / 395.09 / < 0.0001
x2 / 1 / 23.89 / 23.89 / 13.61 / 0.0042
x3 / 1 / 119.45 / 119.45 / 68.04 / < 0.0001
x1x2 / 1 / 1.86 / 1.86 / 1.06 / 0.3273
x1x3 / 1 / 0.061 / 0.061 / 0.035 / 0.8556
x2x3 / 1 / 1.55 / 1.55 / 0.88 / 0.3697
x12 / 1 / 8.08 / 8.08 / 4.60 / 0.0576
x22 / 1 / 0.27 / 0.27 / 0.15 / 0.7028
x32 / 1 / 0.029 / 0.029 / 0.016 / 0.9006

Table S3The ANOVA for ST

Item / Degrees of freedom / Sum of squares / Mean square / F statistic / PF
Model / 9 / 92139.40 / 10237.49 / 39.48 / < 0.0001
Residual error / 10 / 2593.20 / 259.38 / / / /
Total / 19 / 94730.61 / / / / / /
x1 / 1 / 35212.11 / 35212.11 / 135.79 / < 0.0001
x2 / 1 / 1458.23 / 1458.23 / 5.62 / 0.0392
x3 / 1 / 31586.09 / 31586.09 / 121.80 / < 0.0001
x1x2 / 1 / 245.31 / 245.31 / 0.95 / 0.3537
x1x3 / 1 / 3894.03 / 3894.03 / 15.02 / 0.0031
x2x3 / 1 / 298.90 / 298.90 / 1.15 / 0.3082
x12 / 1 / 12685.58 / 12685.58 / 48.92 / < 0.0001
x22 / 1 / 2420.48 / 2420.48 / 9.33 / 0.0121
x32 / 1 / 8305.32 / 8305.32 / 32.03 / 0.0002

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