8. A plant using anaerobic digestion has an inflow of 2 million gallons per day. The influent suspended solids are 255 milligrams per liter (mg/L) with a 4 percent sludge density and 72 percent volatile solids content. The effluent suspended solids are 120 mg/L. The digester contains 150,000 gallons of digesting sludge solids with a sludge density of 6.5 percent solids and 55 percent volatile solids. Estimate the organic loading on an anaerobic digester from the primary clarifiers in pounds of volatile solids applied per day per pound of volatile solids under digestion. 1. 0.07 lb/d/lb 2. 0.05 lb/d/lb 3. 0.04 lb/d/lb 4. 0.06 lb/d/lb

A plant using anaerobic digestion has an inflow of 2 million gallons per day. The influent suspended solids are 255 milligrams per liter ( mg/L ) with a 4 percent sludge density and 72 percent volatile solids content. The effluent suspended solids are 120mg/L. The digester contains 150,000 gallons of digesting sludge solids with a sludge density of 6.5 percent solids and 55 percent volatile solids. Estimate the organic loading on an anaerobic digester from the primary clarifiers in pounds of volatile solids applied per day per pound of volatile solids under digestion. 1. 0.07lb/d/lb 2. 0.05lb/d/lb 3. 0.04lb/d/lb 4. 0.06lb/d/1b