The both sand filtration had removed 66.8 % SS. Two layer sand filtration had removed effectively 45.8% BOD5 and 43.8% COD whereas 32.1% BOD5 and 41.9 % COD for three layer sand filtration
The both sand filtration had removed 66.8 % SS. Two layer sand filtration hadremoved effectively 45.8% BOD5 and 43.8% COD whereas 32.1% BOD5 and 41.9 % COD for three layer sand filtration