Dr. Ali,
please see here: http://www.ais.unwater.org/ais/pluginfile.php/348/mod_resource/content/3/4safe%20WW%20use%20presentation%20-%20for%20IFAT%20Munich.pdf
dr. ali
see this link
http://www.ais.unwater.org/ais/pluginfile.php/348/mod_resource/content/3/4safe%20WW%20use%20presentation%20-%20for%20IFAT%20Munich.pdf
The quantification of grey water generation was calculated in terms of average values of hourly, monthly, daily, and annual basis. The average value of observed
grey water generation was recorded to be 86.76 (l/person/day (lpd)) liters per capita per day. However, this value was around 64% of that recommended by the Indian Standards (IS: 1172-1963), i.e., water consumption requirement of 135 lpd. Generally, 75% to 85% of wastewater discharge is considered sewage water which includes black and grey water, but in the present case, the lack water is allowed to go into the septic tanks of eac house, hostel, and college because the University campus has no sewage treatment facility.
The grey water quality was found to have a clear cut seasonal variation. The annual data of grey water quality was found to significantly lower the degree of pollutants when compared to the permissible limit of discharge. The grey water organic load on the average and maximum low rate basis was calculated in different seasons of the year. The maximum loading due to average and maximum flow rate was recorded to be significantly higher in the summer season, i.e., 33.31 and 83.34 kg/day, respectively. However, in the winter season, the minimum loading was found to be 24.05 and 52.0 kg/day, respectively, due to the higher organic loading; in the summer season, the maximum loading was due to more consumption of water in the household.
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