IWA Publishing

Table 2

Comparison of the results from this study for wastewater COD fractions compared to literature values

Source	Total COD, mg/L	COD fraction in percentage
Source	Total COD, mg/L	S_s	S_I	X_s	X_I	Biomass, X_H
Primary effluent characteristics
This study^a	159 ± 41	22 ± 9	15 ± 7	28 ± 13	35 ± 15	–
Fall et al. (2011) ^a	492	36	5	35	24	–
Siegrist et al. (1995) ^b	250	10	8	58	24	–
Henze (1992)		29	3	43	11	14
Raw influent characteristics
This study^a	280 ± 85	20 ± 10	9 ± 5	35 ± 15	36 ± 20	–
Mehrotra (2018) ^a	290	15	9	24	52	–
Lu et al. (2010)	540	8–10	1–4	27–40	14–36	23–46
Zhou et al. (2008)	176–220	19.5–27.8	8.4–12.8	16.1–37.3	13.9–33.4	14.7–18.9
Roeleveld & van Loosdrecht (2002) ^a	241–827	9–42	3–10	10–48	23–50	–
Kappeler & Gujer (1992)	250–430	7–11	12–20	53–60	8–10	7–15
Henze (1992)	400	27	15	40	17	–

Source	Total COD, mg/L	COD fraction in percentage
Source	Total COD, mg/L	S_s	S_I	X_s	X_I	Biomass, X_H
Primary effluent characteristics
This study^a	159 ± 41	22 ± 9	15 ± 7	28 ± 13	35 ± 15	–
Fall et al. (2011) ^a	492	36	5	35	24	–
Siegrist et al. (1995) ^b	250	10	8	58	24	–
Henze (1992)		29	3	43	11	14
Raw influent characteristics
This study^a	280 ± 85	20 ± 10	9 ± 5	35 ± 15	36 ± 20	–
Mehrotra (2018) ^a	290	15	9	24	52	–
Lu et al. (2010)	540	8–10	1–4	27–40	14–36	23–46
Zhou et al. (2008)	176–220	19.5–27.8	8.4–12.8	16.1–37.3	13.9–33.4	14.7–18.9
Roeleveld & van Loosdrecht (2002) ^a	241–827	9–42	3–10	10–48	23–50	–
Kappeler & Gujer (1992)	250–430	7–11	12–20	53–60	8–10	7–15
Henze (1992)	400	27	15	40	17	–

^aThe fractions were measured and calculated purely with a physical-chemical method.

^bThe Siegrist's fraction was calibrated with estimations used in modeling based on literature (not directly measured).