engineering recuitment GATE CE 2023-24 Test Series Environmental Engineering Water Treatment Filtration
Five rapid sand filter with filtration capacity of 3000 liters/hour/m2 is used to treat 30 MLD of water. Calculate the percentage of filtered water required to backwash filter, if backwashing rate is 6 times the rate of filtration. Duration of backwash is 10 minutes and maturation period is 20 minutes and it is carried out once in every 24 hours.
Enter numerical value using the virtual keypad. Round off where necessary.