Sludge Bulking Prediction Using Principle Component Regression and Artificial Neural Network

Table 4

Composition of the principle components for the prediction model.

Variables	Component
	PC1	PC2	PC3
COD	.938	.006	−.131
BOD	.913	−.055	−.100
SS	.897	−.049	.007
TP	.855	.019	.016
TN	.685	.551	−.110
NH3	.582	.653	−.048
MLSS	−.197	.729	−.004
pH	.114	−.265	.767
Temperature	−.246	.210	.762