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 Model | Variables in model | R-square | Adjust R-square | C P | MSE |
| 1 | UV254 | 0.6322 | 0.6147 | 11.10 | 0.9839 | 2 | DOC | 0.5117 | 0.4885 | 7.86 | 1.3062 | 3 | F1, F2, F3, and F4 | 0.4163 | 0.2866 | 0.71 | 0.3904 | 4 | DOC, UV254 | 0.6326 | 0.5959 | 9.11 | 0.4914 | 5 | DOC, F1, F2, F3, and F4 | 0.6636 | 0.5646 | ā3.95 | 0.1500 | 6 | UV254, F1, F2, F3, and F4 | 0.7770 | 0.7114 | 7.00 | 0.1193 | 7 | DOC, UV254, F1, F2, F3, and F4 | 0.7770 | 0.6934 | 7.00 | 0.0994 |
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(b) Wastewaters |
| Number in model | Variables in model | R-square | Adjust R-square | CP | MSE |
| 1 | UV254 | 0.6538 | 0.6345 | 3.29 | 9441.1632 | 2 | DOC | 0.8310 | 0.8217 | 7.61 | 4607.0759 | 3 | F1, F2, F3, and F4 | 0.2271 | 0.0210 | 35.52 | 5268.8259 | 4 | DOC, UV254 | 0.8609 | 0.8445 | 7.45 | 1896.5335 | 5 | DOC, F1, F2, F3, and F4 | 0.8901 | 0.8509 | ā3.24 | 599.2478 | 6 | UV254, F1, F2, F3, and F4 | 0.7140 | 0.6118 | 7.59 | 1559.9272 | 7 | DOC, UV254, F1, F2, F3, and F4 | 0.9024 | 0.8574 | 7.00 | 443.5252 |
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