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

Table 6

Variables selected for residual aluminium using multilayer perceptrons (MLPs).

Round	Variables	Correlation coefficient (C)
1	Water temperature	0.76
2	Aluminium dose/raw water KMnO4	0.86
3	Silicates in raw water	0.88
4	Surface level of Lake Humaljärvi	0.88
5	Hardness of raw water	0.88
6	Turbidity of raw water	0.89
7	Aluminium dose	0.90
8	pH of raw water	0.91
9	KMnO4 of raw water	0.89
10	Aluminium feed	0.91