Calculating BOD, COD, or SS loading on an aeration process
When calculating COD, BOD, or SS loading on an aeration process (or any other treatment process),loading on the process is usually calculated as lb/day. The following equation is used:
BOD, COD, or SS loading (lb/day) = mg/L x MGD x 8.34 lb/gal
The BOD concentration of the wastewater entering an aerator is 210 mg/L. If the flow to the aerator is 1,550,000 gpd, what is the BOD loading in lb/day?
BOD (lb/day) = BOD (mg/L)x flow (MGD) x 8.34 lb/gal
= 210 mg/L x 1.55 MGD x 8.34 lb/gal
= 2715 lb/day