Problem 3: You are considering three design alternatives for treating a pollutant in wastewater using a first- order process (k = 1.5 min-¹). The flow is 9 million gallons per day (mgd). The three alternatives, each of which has a total volume of 10,000 gallons, are: (1) one 10,000 gallon well-mixed basin; (2) two 5,000 gallon well- mixed basins in series (see sketch below); and (3) one 10,000 gallon pipe. Calculate the percent removal of the pollutant for each alternative at steady state. Which system gives the best removal? Two tanks in series

Problem 3: You are considering three design alternatives for treating a pollutant in wastewater using a first- order process (k = 1.5 min-¹). The flow is 9 million gallons per day (mgd). The three alternatives, each of which has a total volume of 10,000 gallons, are: (1) one 10,000 gallon well-mixed basin; (2) two 5,000 gallon well- mixed basins in series (see sketch below); and (3) one 10,000 gallon pipe. Calculate the percent removal of the pollutant for each alternative at steady state. Which system gives the best removal? Two tanks in series

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Question #5. The fluoride feeder at the Lemieux Island WTP breaks down. As shown below, the well mixed tank flows into a 5 km long distribution pipe. The volume of the tank is 2.5 m³ and the treatment system serves 190 000 people who each use 200 L/d. The rest of the necessary data is provided in the figure. If the fluoride concentration in the tank is 1.0 mg/L when the feed stops, how long until the concentration of fluoride is reduced to 0.01 mg/L at the end of the distribution pipe? Assume that fluoride acts as a conservative substance. Fluoride C = 1.0 mg/L 5 km u = 0.17 m/s
QUESTION 2 Kindly answer correctly. Please show the necessary steps
The 5-day, 20°C BOD of a wastewater (Ke = 0.23/day, 0 = 1.047) is 185 mg/L. What is the corresponding 10-day demand and ultimate BOD (in mg/L)? If the bottle had been incubated at 33°C, what would the 5-day BOD value have been?
5. You are asked to design a single media filtration system for a drinking water facility. The design flow rate is 20 mgd (million gallons per day). The ideal filter velocity for your system is 8 m/hr. You design a set of filters to be used in parallel. Each filter box has a surface area of 50 m². a. How many filters do you need to construct? b. Estimate the (clean-filter) head loss in kPa? c. What mass removal (filter efficiency) would you expect for an influent stream that contains equal parts (by mass) of 1, 10 and 100 um particles? You can assume an adhesion efficiency a = 0.7. Sand Effective Size (mm) 0.8 Uniformity Coefficient 1.2 Grain Porosity Density (g/cm³) 2.6 0.4 Layer Thickness (m) 1.5
Show step by step solution
You are constructing a sewage lagoon with a 3,100 m3/day inlet/outlet flow rate. You must attain a BOD outflow load of 12 mg/L given a BOD inlet load of 26 mg/L. BOD has a half-life of 2.4 days.What volume is needed for the lagoon and how long would it take for the output BOD concentration to reach 1 ppm if freshwater started to replace the wastewater that was previously entering the lagoon?