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An Anaerobic digester is to be designed for the treatment of 100,000 gallons per day of...

An Anaerobic digester is to be designed for the treatment of 100,000 gallons per day of waste activated sludge. The sludge contains 5% total solids of which 70 % are volatile. a) What is the required volume (in cu ft) of the digester if the minimum hydraulic detention time is 20 days and the maximum organic loading is 0.25 lb VS/cu-ft-day? 1 cu ft = 7.48 gallons, 1 cu ft of sludge weighs 63 lbs. b) Would the volume calculated based on organic loading provide a satisfactory design?

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