Using Table 20-20 , select a CBFP to dewater an anaerobic digester sludge. The sludge is...

Using Table 20-20 , select a CBFP to dewater an anaerobic digester sludge. The sludge is primary plus WAS that has a solids concentration of 2.5% and a specific gravity of 1.03. The design sludge flow rate is 404 m³/d. The plant will operate on a three-shift basis.

Table 20-20

In the preliminary analysis of alternatives for stabilizing the mixture of primary and WAS sludge from Knight Falls’ activated sludge plant, your boss has asked you to design an anaerobic digester. Determine the volume of the digester, the flow rate of methane, and the volume of an external tank pressurized to 350 kPa. Use the data from Problem 20-18 and the following data for this design:

Problem 20-18

In the preliminary analysis of alternatives for stabilizing a mixture of primary and WAS sludge from Knight Falls’ activated sludge plant, your boss has asked you to design an aerobic digester. The sludge flow rate is 404 m³/d. The solids concentration 2.8% and the specific gravity of the sludge is 1.01. Use the following data for the design: