Table 3 Statistical Regression Fit Model of combined treatment processes

From: Combined advanced oxidation dye-wastewater treatment plant: design and development with data-driven predictive performance modeling

S. No.

Parameter

Outlet COD

Outlet TOC

Outlet Turbidity

C&F

R2

0.787

0.673

0.835

R2 adj

0.754

0.62

0.81

RMSE

51.259

24.89

9.09

p-Value

<0.0001

<0.0001

<0.0001

Fit Model (\(\hat{{y}}\))

- 961.91 + 0.296*COD + 4.57 *BOD - 0.19*TDS - 0.16* TOC + 42.03*pH + 2.93* Turbidity

541.934 - 0.0026*COD + 1.467 *BOD - 0.067*TDS - 0.164* TOC + 0.88*pH – 1.31* Turbidity

- 8.184 - 0.0023*COD + 0.35* BOD - 0.04*TDS - 0.04*TOC - 9.586*pH + 0.96*Turbidity

SF

R2

0.533

0.82

0.975

R2 adj

0.459

0.792

0.971

RMSE

28.413

5.42

2.128

p-Value

<0.0001

<0.0001

<0.0001

Fit Model (\(\hat{{y}}\))

426.05 + 0.11*COD + 0.89 *BOD - 0.02*TDS – 0.26* TOC + 11.76*pH – 0.24* Turbidity

131.55 + 0.076*COD – 0.187* BOD + 0.012*TDS – 0.097* TOC – 2.42*pH – 0.34* Turbidity

- 31.22 + 0.013*COD - 0.004* BOD - 0.006*TDS + 0.077* TOC + 2.113*pH + 0.635* Turbidity

NM

R2

0.974

0.957

0.98

R2 adj

0.969

0.95

0.98

RMSE

5.849

2.36

1.34

p-Value

<0.0001

<0.0001

<0.0001

Fit Model (\(\hat{{y}}\))

- 130.385 + 0.38*COD + 0.68*BOD + 0.002*TDS + 0.17* TOC + 7.36*pH + 2.15 *Turbidity

- 23.173 + 0.201*COD - 0.398* BOD - 0.02*TDS + 0.75*TOC – 4.59*pH – 0.212*Turbidity

51.534 + 0.0009*COD + 0.15* BOD - 0.003*TDS + 0.08*TOC – 8.19* pH + 0.625*Turbidity

PAN

R2

0.992

0.974

0.95

R2 adj

0.991

0.97

0.94

RMSE

2.74

1.23

0.75

p-Value

<0.0001

<0.0001

<0.0001

Fit Model (\(\hat{{y}}\))

52.76 + 0.51*COD + 0.44* BOD + 0.0001* TDS + 0.47* TOC – 16.31*pH + 0.86* Turbidity

86.504 + 0.05*COD + 0.018* BOD + 0.002*TDS + 0.65*TOC – 14.76*pH - 0.373*Turbidity

-33.36 -0.077*COD + 0.16* BOD + 0.003*TDS + 0.12*TOC + 3.66*pH + 0.57*Turbidity

ACF

R2

0.977

0.98

0.92

R2 adj

0.973

0.97

0.91

RMSE

3.254

0.662

0.46

p-Value

<0.0001

<0.0001

<0.0001

Fit Model (\(\hat{{y}}\))

- 11.93 + 0.66*COD - 1.115* BOD - 0.006* TDS + 0.71* TOC - 2.69*pH - 0.84* Turbidity

15.66 + 0.04*COD + 0.075* BOD + 0.0002*TDS + 0.398* TOC – 2.12* pH – 0.405* Turbidity

- 1.68 + 0.03*COD + 0.13*BOD + 0.0003*TDS + 0.17* TOC – 0.41*pH + 0.52* Turbidity

  1. Output Predictive Regression Modeling for statistical analytics of the individual treatment process steps for predictive and prescriptive analytical decision-making.
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