From: Grey water pollutant loads in residential colony and its economic management
Grey water quality a (mg/l except pH) | Grey water organic load (kg/day) | ||||
---|---|---|---|---|---|
Water quality parameters | Seasonal variation | Annual average | Season | Average flow rate basis | Maximum flow rate basis |
pH | 7.3 to 8.1 | 7.68 | Monsoon | 30.85 ± 13.59b | 55.3 ± 35.28b |
BOD | 52 to 68.5 | 58.5 | |||
COD | 252 to 319 | 277.5 | |||
Total solids | 646 to 802 | 713 | Winter | 24.05 ± 12.37b | 52.00 ± 33.43b |
Total suspended solids | 218 to 337 | 273.11 | |||
Total dissolved solids | 392.0 to 495.25 | 439.89 | |||
Total carbon | 206.2 to 221.0 | 208.4 | Summer | 33.31 ± 15.79b | 83.34 ± 57.77b |
Total nitrogen | 33.5 to 42.0 | 38.26 | |||
Total phosphorus | 7.9 to 8.72 | 8.31 | |||
Total potassium | 3.5 to 3.85 | 3.6 | Annual | 29.44 ± 4.80b | 62.71 ± 17.22b |