ABSTRACT
Chapter 3-Achievement Test Cont'd 9. An aeration tank is 100ft long and 40 ft wide. The operatingdepth is 13 ft. If the
mixed liquor suspended solids concentration is 2610 mg/L, how manypounds of mixed liquor suspended solids areunder aeration? (Roundthe tank: volumeto the nearest ten thousand.)
ANS _
10. The WAS suspended solids concentration is 5980 mg/L. If 5540 lbs/day solidsare to be wasted, what must the WAS pumpingrate be, in MOD? (Roundto the nearest hundredthMOD.)
ANS _
11. The flow to anaeration tank: is 2200 gpm. If the COD concentration of the water is 125 mg/L, how many pounds COD enter the aeration tank: daily?
