Table 2 Characteristics of treated wastewater by HSSFCW with pumice substrate and CZ at different HRT
Parameters | Influent (mg/L, except for pH, EC and salinity) | Effluent Conc. at Different HRT( mg/L, except pH, EC & salinity) | EEPA &WHO irrigation WQS | |||
|---|---|---|---|---|---|---|
3 days | 5 days | 7 days | 9 days | |||
BOD5 | 1641 ± 373.55 | 273 ± 91 | 74 ± 2 | 58.67 ± 6.5 | 60.67 ± 4.93 | 200 |
COD | 6953.33 ± 339.41 | 532.50 ± 177.5 | 225.41 ± 11.13 | 214.67 ± 32.33 | 234.67 ± 38.79 | 500 |
NH4-N | 253.33 ± 11.6 | 26.83 ± 2.93 | 5.00 ± 4.36 | 4.67 ± 1.53 | 6.83 ± 1.44 | 30 |
NO3-N | 116.66 ± 26.63 | 10.83 ± 2.75 | 0 ± 0 | 0.37 ± 0.15 | 0.57 ± 0.21 | 10 |
TN | 650.33 ± 93.62 | 42 ± 15.72 | 8.67 ± 5.7 | 6.50 ± 1.32 | 9.33 ± 2.1 | 60 |
PO4-P | 88.06 ± 40.77 | 6.33 ± 2.1 | 3.04 ± 1 | 2.67 ± 1.26 | 0 ± 0 | 5 |
TP | 144.53 ± 20.75 | 19.67 ± 3.05 | 7.53 ± 2.33 | 5.53 ± 0.5 | 83.87 ± 11.37 | 10 |
TSS | 1868 ± 863.1 | 99.72 ± 80.93 | 79 ± 13.53 | 80 ± 4.58 | 74 ± 21.65 | 50 |
TDS | 5877.3 ± 2294.77 | 1504.97 ± 1286.16 | 1279 ± 75 | 768.67 ± 45.54 | 798 ± 17.43 | 2100 |
TCr | 18.33 ± 6.66 | 0.88 ± 0.03 | 0.30 ± 0.1 | 0.20 ± 0.1 | 0.35 ± 0.13 | 2 |