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	m^3/h	−0.16	−0.27
9	Intake from the pikkala reservoir	m^3/h	0.25	0.39
10	Total intake of water	m^3/h	−0.033	−0.07
11	Aluminium feed	L/h	0.11	0.23
12	Filter wash water	m^3/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/m^3	0.25	0.46
19	Aluminium dose/raw water KMnO4		0.052	−0.08
20	Flow to filter 1	m^3/h	0,078	0.03
21	Flow to filter 2	m^3/h	0,22	0.19
22	Flow to filter 3	m^3/h	−0.097	−0.11
23	Flow to filter 4	m^3/h	0.31	−0.32