Modelling of Water Quality: An Application to a Water Treatment Process

Table 5

Variables selected for residual aluminium using multiple linear regression (MLR).

Round	Variables	Correlation coefficient (C)
1	Water temperature	0.72
2	Aluminium dose/raw water KMnO4	0.79
3	Silicates in raw water	0.81
4	pH of raw water	0.81
5	Hardness of raw water	0.82
6	Flocculation pH	0.82
7	Conductivity of raw water	0.82
8	Total intake of water	0.82
9	Surface level of Lake Humaljärvi	0.82
10	Colour of raw water	0.82