Research Article
Modelling of Water Quality: An Application to a Water Treatment Process
Table 2
Process variables used for modelling and their correlations with residual Al and turbidity.
| | Variable | Unit | Correlation with residual Al | Correlation with turbidity |
| 8 | Intake from Lake Humaljärvi | m3/h | −0.16 | −0.27 | 9 | Intake from the pikkala reservoir | m3/h | 0.25 | 0.39 | 10 | Total intake of water | m3/h | −0.033 | −0.07 | 11 | Aluminium feed | L/h | 0.11 | 0.23 | 12 | Filter wash water | m3/h | −0.36 | −0.12 | 13 | Proportion of Lake Humaljärvi/Pikkala reservoir water intake | % | −0.52 | −0.38 | 14 | Surface level of Lake Humaljärvi | m | 0.28 | 0.14 | 15 | KMnO4 of raw water | mg/L | 0.065 | 0.44 | 16 | Flocculation pH | | | | 17 | Water temperature |
°C | −0.72 | −0.42 | 18 | Aluminium dose | g/m3 | 0.25 | 0.46 | 19 | Aluminium dose/raw water KMnO4 | | 0.052 | −0.08 | 20 | Flow to filter 1 | m3/h | 0,078 | 0.03 | 21 | Flow to filter 2 | m3/h | 0,22 | 0.19 | 22 | Flow to filter 3 | m3/h | −0.097 | −0.11 | 23 | Flow to filter 4 | m3/h | 0.31 | −0.32 |
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