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

Table 1

BOD₅ and different parameters measured for river waters and wastewaters.

Sample	BOD5  mg L^−1	DOC mg L^−1	Absorbance at 254 nm	Fluorescence intensity (AU)
				270∼300 nm	310∼370 nm	370∼400 nm	400∼530 nm
River waters
Mean	1.6	2.0	0.049	53600	450202	201142	300654
S.D.	0.2	0.2	0.008	19294	57116	30772	64592
Min	1.3	1.6	0.036	28252	381099	158019	188096
Max	1.9	2.5	0.064	84575	595808	254822	461216
Waste-waters
Mean	62.0	21.8	0.219	366183	3050004	528135	849118
S.D.	37.9	13.4	0.079	192547	1771048	116813	213009
Min	6.5	3.5	0.090	114609	1629452	350192	549098
Max	139.9	55.2	0.310	755116	9233331	748122	1272352