Waste Water Engineering

Industrial sewage Domestic sewage Storm water Inclusive of domestic and industrial sewage but excludes storm water Weight of the pipe Weight of the back fill Superimposed traffic loads All the above Surface loading Overflow rate Overflow velocity All of these 3 m 3.5 m 4 m 4.5 m Bacterias Suspended solids Sediments Hardness Should be sunk by 20 cm Should be kept 20 cm above the adjacent portion Should be sunk by 50 cm Need not be sunk D/1 D/2 D/3 D/4 Mean radius of sewer Difference in heads between two points in circular pipes Mean of radii in a pipe line of varying cross -sections Cross-sectional area/wetted perimeter Less than 0.01 mm Less than 0.05 mm Less than 0.1 mm Greater than 0.1 mm Brick sewer Cast iron sewer R.C. sewer Lead sewer Chemical and biological solids Biological solids Settlable solids Chemical sludge 850 mg/L 1200 mg/ L 720 mg/L 350 mg/L Refractory organics Priority pollutants Suspended solids Nutrients Suspended solids Metals Phosphorus BOD Screens Grit Debris Waste S. trap Gully trap Floor trap P. trap Sewerage Grey water Sullage Sewage Brown water Yellow water Black water Grey water Biosolids Potential solids Manure Solids Waste water sewers Water sewers Storm sewers Sanitary sewers