Estimation of Biochemical Oxygen Demand Based on Dissolved Organic Carbon, UV Absorption, and Fluorescence Measurements

Table 2

Correlation coefficients between parameters for (a) river waters and (b) wastewaters.

(a) River waters

Parameter	BOD5; (mg L^−1)	DOC; (mg L^−1)	Absorbance; at 254 nm	Fluorescence at 270~300 nm	Fluorescence at 310~370 nm	Fluorescence at 370~400 nm	Fluorescence at 400~530 nm
BOD5 (mg L^−1)	1
DOC (mg L^−1)	0.72	1
Absorbance; at 254 nm	0.80	0.91	1
Fluorescence at 270~300 nm	0.32	−0.05	0.02	1
Fluorescence at 310~370 nm	0.38	0.15	0.26	0.75	1
Fluorescence at 370~400 nm	0.62	0.58	0.73	0.41	0.70	1
Fluorescence at 400~530 nm	0.50	0.37	0.46	0.78	0.80	0.75	1

(b) Wastewaters

Parameter	BOD5; (mg L^−1)	DOC; (mg L^−1)	Absorbance; at 254 nm	Fluorescence at 270~300 nm	Fluorescence at 310~370 nm	Fluorescence at 370~400 nm	Fluorescence at 400~530 nm
BOD5 (mg L^−1)	1
DOC (mg L^−1)	0.91	1
Absorbance; at 254 nm	0.81	0.76	1
Fluorescence at 270~300 nm	0.36	0.27	0.42	1
Fluorescence at 310~370 nm	0.42	0.30	0.51	0.54	1
Fluorescence at 370~400 nm	0.24	0.31	0.47	0.61	0.39	1
Fluorescence at 400~530 nm	0.27	0.32	0.54	0.63	0.37	0.97	1