3. A rotating biological contactor applied for secondary wastewater treatment is to be designed: Population equivalent =

[answerhappygod]

3 A Rotating Biological Contactor Applied For Secondary Wastewater Treatment Is To Be Designed Population Equivalent 1 (29.26 KiB) Viewed 37 times

3. A rotating biological contactor applied for secondary wastewater treatment is to be designed: Population equivalent = 50,000; Daily wastewater production per person equivalent = 2001/d; and Five-day biochemical oxygen demand (BOD) load after primary sedimentation per person equivalent = 0.04 kg/d. Major assumptions to be taken into account for the calculations: theoretical population correction factor = 1.2; area to flow rate ratio = 18,000 m²/m/min; theoretical area reduction factor = 0.87; stages of the disc unit = 4; approximate disc diameter = 3 m; and threshold for first stage loading: < 90 g BODs/m®/d. a) Calculate 0) the corrected disk area and corresponding unit; and (12 Marks)