2.3 You have been asked to design a circular de-chlorination basin for 2 MGD treated wastewater. If use Na2S2O3 and the depth of the tank is to be 4.5 ft, what would you suggest the diameter of this tank? a) 50 ft c) not enough information 2.4 Alum required for a 1.5 mg/L dose and for a plant treat 10 MGD of drinking water is: a) 68.3 Ib/day b) 42 ft b) 125.11b/day d) no need for tank c) 62.6 Ib/day = d) 72.8 Ib/day

Problem: You are designing a 20 mgd wastewater treatment plant. To characterize the plant's influent solids, the lab used 90 ml samples of the ty[ical wastewater and the following equipment: Solids: Lab Equipment Evaporation Dish Gooch crucible 2.0-micron paper filter 2.0-micron Whatman GF/C filter Lab Measurement Dish + Residue after evaporation 4. Weight 54.2830g 54.2170g 1.5240g 1.6948g 1. The lab placed a sample in an evaporation dish and evaporated it at 105°C finding that the dish weighted 54.3490 g after the dish cooled. What is the concentration (mg/L) of the Total Solids (TS) in the influent?(Ans: TS = 733.3 mg/L) 54.349g 2. If you anticipate a Total Suspended Solids mass loading of 48,400 lb/day at this flow rate, what is the concentration of TSS you anticipate in the influent? What does the analytical scale read? 3. The lab then filtered a sample through a 2-micron filter and evaporated the filter at 105°C, what was the mass of the residue found on the filter paper after it…

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Please include Equations used. This is for water and wastewater engineering