answer please

Part I. Write a short note on the activated sludge treatment process by sketching a neat schematic diagram of the process. Give the definitions of MLVSS, food to microorganism (F/M) ratio, and the solid retention time (SRT) along with their appropriate equations. Part II. Design a high rate single stage trickling filter (TF) for treating domestic sewage flow of 4.5 MLD using the NRC equation. Given, BOD of raw sewage =200mg/L,BOD removed after the primary treatment in the grit chamber - 25%, the final effluent BOD coming from the secondary sedimentation tank (SST)=30mg/L, recirculation ratio (R)=2.5, and the ratio of hydraulic loading rate (HLR) to the organic loading rate (OLR)=20m4/kg. Determine the volume (V) of TF