A300-gallon anaerobic digester will be loaded daily with a feedstock that contains two parts dairy manure and one-part water by volume. the feedstock contains 6% volatile solids (vs) by weight and has a density of 37.5 lb/ft'. what volume of feedstock would be required each day to maintain an organic loading rate (olr) of 2.0 kg vs/m/day? what is the hydraulic retention time (hrt) in the anaerobic digester tank for a loading rate of 2.0 kg vs/m/day?