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Table 1 Organics and nutrients mean concentrations (mg l−1) and standard deviation of brewery wastewater at the inlet and outlet of the control and hydroponic treatment units planted with vetiver grass

From: Bioremediation of brewery wastewater using hydroponics planted with vetiver grass in Addis Ababa, Ethiopia

Parameter Inlet Outlets
Control units Hydroponic treatment units
BOD5 1214 ± 380.61 (748–1642) 1024 ± 327.89 (576–1429) 527 ± 257.89 (238–873)
COD 2012 ± 595.66 (835–2602) 1760 ± 569.12 (660–2368) 1111 ± 461.09 (352–686)
TKN 33 ± 8.46 (19–43) 29 ± 8.47 (15–8) 19 ± 2.24 (14–21)
NH4+-N 24 ± 4.32 (18–31) 20 ± 3.48 (17–7) 15 ± 1.93 (13–19)
NO3-N 13 ± 3.12 (8–17) 11 ± 3.29 (7–15) 7 ± 2.49 (3–11)
PO 4 −3 -P 15 ± 5.00 (8–23) 13 ± 4.64 (7–21) 7 ± 2.00 (3–10)
  1. Minimum and maximum concentrations (mg l−1) are indicated in brackets