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Table 1 General characteristics of UASB reactor effluent throughout each monitoring period

From: Effectiveness of two-stage horizontal subsurface flow constructed wetland planted with Cyperus alternifolius and Typha latifolia in treating anaerobic reactor brewery effluent at different hydraulic residence times

Operation Pollutants concentration (mg/L)
Temp.(oC) pH TSS COD TN TP PO4-P
1 day HRT 31.2 ± 2.81 7.7 ± 0.24 217.1 ± 7.21 531 ± 47.81 94.8 ± 12.17 41.1 ± 8.46 31 ± 7.95
2 days HRT 29.8 ± 2.83 7.6 ± 0.17 167.5 ± 39.03 409.4 ± 54.61 70.3 ± 13.46 35.3 ± 7.94 21.2 ± 6.03
3 days HRT 28.2 ± 3.52 7.4 ± 0.15 128.6 ± 29.62 381.9 ± 53.05 51.1 ± 10.61 31.2 ± 6.56 19.4 ± 8.79
4 days HRT 28.6 ± 2.65 7.5 ± 0.26 95.1 ± 15.34 381.2 ± 33.59 44.9 ± 7.29 29.3 ± 6.48 16.9 ± 5.29
5 days HRT 26.1 ± 3.89 7.3 ± 0.25 86.2 ± 17.04 298.6 ± 38.55 34.1 ± 6.48 24.8 ± 5.11 16.4 ± 3.41
p-value >0.05 >0.05 <0.05 <0.05 <0.05 <0.05 <0.05
Standarda 40 6–9 <50 <250 <40 - <5
  1. aEEPA (2003) brewery effluent discharge standards