Sludge Bulking Prediction Using Principle Component Regression and Artificial Neural Network

Table 1

Water quality characteristics of CQ from Jan. 1, 2010 to Dec. 31, 2010.

Parameter	Max.	Min.	Mean	Std. dev.
Temp.	29.2	13.5	20.499	4.395
MLSS	6530	14	4088.363	999.860
BOD	609	58	184.975	74.802
COD	899	113	305.094	122.215
SS	755	80	224.798	99.811
pH	8.18	7.56	7.840	0.099
TP	10.4	1.38	3.772	1.220
TN	96.9	20.6	43.460	11.295
NH4^+-N	82	11.2	32.875	9.334
SVI	298	27	123.141	67.893