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Table 1 Characteristics of Modjo tannery raw wastewater

From: Developing horizontal subsurface flow constructed wetland using pumice and Chrysopogon zizanioides for tannery wastewater treatment

Parameters (mg/l)

Mean value

Range

pH

10.166 ± 2.02

8–12

BOD5

1641 ± 373.6

1243–1984

COD

6953.333 ± 339.4

6593–7267

NH4-N

253.3333 ± 11.6

240–261

NO2-N

1.913333 ± 0.12

1.77–1.99

NO3-N

116.6667 ± 26.6

94–146

TN

650.3333 ± 93.6

546–727

PO4-P

88.06667 ± 40.8

46.5–128

TP

144.5333 ± 20.8

128.6–168

TSS

1868 ± 863.1

1217–2847

TDS

5877.3 ± 2294.8

3250–7489

TCr

18.33 ± 6.7

14–26