Research Article

Estimation of Biochemical Oxygen Demand Based on Dissolved Organic Carbon, UV Absorption, and Fluorescence Measurements

Table 3

Summary of model development for predicting BOD5 of (a) river waters and (b) wastewaters.
(a) River waters

Number in ModelVariables in modelR-squareAdjust R-squareC PMSE

1UV2540.63220.614711.100.9839
2DOC0.51170.48857.861.3062
3F1, F2, F3, and F40.41630.28660.710.3904
4DOC, UV2540.63260.59599.110.4914
5DOC, F1, F2, F3, and F40.66360.5646āˆ’3.950.1500
6UV254, F1, F2, F3, and F40.77700.71147.000.1193
7DOC, UV254, F1, F2, F3, and F40.77700.69347.000.0994

(b) Wastewaters

Number
in model
Variables in modelR-squareAdjust R-squareCPMSE

1UV2540.65380.63453.299441.1632
2DOC0.83100.82177.614607.0759
3F1, F2, F3, and F40.22710.021035.525268.8259
4DOC, UV2540.86090.84457.451896.5335
5DOC, F1, F2, F3, and F40.89010.8509āˆ’3.24599.2478
6UV254, F1, F2, F3, and F40.71400.61187.591559.9272
7DOC, UV254, F1, F2, F3, and F40.90240.85747.00443.5252