Research Article
Removal of Pathogens from Domestic Wastewater Using Small-Scale Gradual Hydroponics Planted with Duranta erecta, Addis Ababa, Ethiopia
Table 2
Mean influent and effluent concentration of HB, TC, and FC at different HRTs.
| | Parameters | HRT (day) | Influent | Effluent | Ethiopian standard | E-1
Avg ± SD | E-2
Avg ± SD | C-1
Avg ± SD | C-2
Avg ± SD |
| | HB (CFU/100 ml) | 1 | 8.76 ± 0.020 | 8.34 ± 0.004 | 8.43 ± 0.005 | 8.63 ± 0.003 | 8.68 ± 0.003 | — | | TC (CFU/100 ml) | 5.54 ± 0.005 | 5.17 ± 0.021 | 5.25 ± 0.018 | 5.46 ± 0.011 | 5.49 ± 0.012 | 2.6 | | FC (CFU/100 ml) | 4.55 ± 0.020 | 4.25 ± 0.047 | 4.34 ± 0.032 | 4.47 ± 0.031 | 4.50 ± 0.030 | 1 | | HB (CFU/100 ml) | 3 | 8.81 ± 0.019 | 8.21 ± 0.009 | 8.45 ± 0.006 | 8.55 ± 0.004 | 8.66 ± 0.002 | — | | TC (CFU/100 ml) | 5.62 ± 0.005 | 5.10 ± 0.031 | 5.23 ± 0.015 | 5.47 ± 0.010 | 5.55 ± 0.007 | 2.6 | | FC (CFU/100 ml) | 4.71 ± 0.017 | 4.15 ± 0.039 | 4.31 ± 0.040 | 4.59 ± 0.019 | 4.65 ± 0.015 | 1 | | HB (CFU/100 ml) | 5 | 8.82 ± 0.010 | 8.50 ± 0.020 | 8.02 ± 0.014 | 8.49 ± 0.004 | 8.60 ± 0.003 | — | | TC (CFU/100 ml) | 5.71 ± 0.004 | 4.87 ± 0.054 | 5.02 ± 0.031 | 5.54 ± 0.009 | 5.57 ± 0.004 | 2.6 | | FC (CFU/100 ml) | 4.77 ± 0.009 | 3.81 ± 0.110 | 4.19 ± 0.049 | 4.61 ± 0.018 | 4.67 ± 0.012 | 1 | | HB (CFU/100 ml) | 7 | 8.95 ± 0.016 | 7.06 ± 0.098 | 7.96 ± 0.015 | 8.38 ± 0.007 | 8.56 ± 0.004 | — | | TC (CFU/100 ml) | 5.86 ± 0.002 | 4.43 ± 0.128 | 4.99 ± 0.019 | 5.55 ± 0.008 | 5.68 ± 0.007 | 2.6 | | FC (CFU/100 ml) | 4.96 ± 0.008 | 3.80 ± 0.125 | 4.17 ± 0.046 | 4.68 ± 0.013 | 4.79 ± 0.011 | 1 |
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