The pounds formula converts a flow and concentration into a mass per day.
Pounds Formula
Formula
lb/d = Flow, MGD x Concentration, mg/L x 8.34 lb/gal
Inputs used
- Flow (MGD)
- Concentration or dose (mg/L)
Worked example (White River WRRF, fictional)
- Load = 8.0 x 220 x 8.34 = 14,678.4 lb/d
Tips
- 8.34 lb/gal is the weight of water; use specific gravity for heavier liquids.
Results are estimates for operator use. Check units and inputs, and confirm decisions with plant data and procedures.