ABSTRACT
Notice that the mixed liquor suspended solids concentration is concentration within a tank. Therefore, the equation using MG volume is used.
Another important measure of solids in the aeration tank is the amount of volatile suspended solids. * The volatile solids content of the aeration tank is used as an estimate of the microorganism population of the aeration tank. The Mixed Liquor Volatile Suspended Solids (MLVSS) usually comprises about 70% of the MLSS. The other 30% of the MLSS are fixed (inorganic) solids. To calculate the lbs MLVSS, use the mglL to lbs equation:
(mg/L) (MG) (8.34) = lbs MLVSS Vol lbdgal
Example 1: (lbs Solids Under Aeration) P An aeration tank has a volume of 450,000 gallons. If the mixed liquor suspended solids are 1820 mg/L, how many pounds of suspended solids an in the aerator?
