IV. Total 33 points The quantitative flow diagram of a WWTP is shown below. The plant handles 0.85 m/s of influent wastewater that enters with a TSS of 210 mg/L. The specific gravity of the solids in the stabilized sludge is 1.32. The solids content of the stabilized sludge solids is 3.5%. Influent Primary Clarifier A Secondary Clarifier Effluent B -0.45 -0.08 G D Anaerobic Digester Biogas H Gravity Belt -0.38 F Thickener E Supernatant (treated -0.17 -0.04 separately) Scum (treated separately) Stabilized Sludge 1. (5 points) Calculate the influent mass flowrate of solids (A). Report in kg/day. 2. (3 points) Calculate the fraction of influent solids that end up in the primary clarifier sludge (G). Hint: this is no This figure same as previous page, placed here for convenience. Influent A Primary Clarifier B Secondary Clarifier Effluent -0.45 -0.08 Anaerobic Digester H Biogas F Gravity Belt Thickener 0.38 E Supernatant (treated -0.17 Scum -0.04 separately) (treated separately) Stabilized Sludge 3. (13 points) Derive the equation to solve for the mass flowrate of stabilized sludge solids (J) and solve for J. Report in kg/day. Note: if you are unable to solve this step, assume J=10000 kg/day to continue. 4. (4 points) Calculate the specific gravity of the stabilized sludge. 5. (4 points) Calculate the volume of stabilized sludge produced per day. Report in m/day. 6. (4 points) If the stabilized sludge goes through a dewatering process that raises its solids content to 23% calculate the volume of dewatered sludge produced per day. Report in m/day.