A town with a sewer population of4,000 has a daily wastewater flow,including industrial wastewaters of1,600 m³ and an average BOD of280 mg per liter. The industrialdischarges to the municipal sewersare 60 m³ at 1,800 mg per literBOD from a meat processing plantand 100 m³ at 400 mg per literBOD from a soap canning plant.Determine the contribution ofdomestic flow in liters per personand the BOD in grams per personbased on the town's wastewater,excluding the industrialwastewater.

The objective of the question is to determine the contribution of domestic flow in liters per person…

Answered: A town with a sewer population of 4,000…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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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?
Calculate net wastewater generation from the following data: Total Population = 1000 Water consumption rate = 200 L/cap.day Infiltration rate = 15% Evaporation rate = 5% . Express the net wastewater generation in m3/day and L/sec.
A 15-mL sample of sewage is mixed with enough dilution water to fill a 300 mL BOD bottle. The bottle has an initial DO of 8.5 mg/L. At the end of 5 days, meausured DO is 2.8 mg/L. Calculate BOD5 of the sewage.
You are building a wastewater lagoon with an inlet/outlet flow rate of 3,100 m3/day. The BOD inlet load is 26 mg/L and you need to achieve 12 mg/L at the outlet. The half-life of BOD is 2.4 days. What is the volume required for the lagoon? If the wastewater stopped entering the lagoon and was replaced by freshwater, how long would it take for the outlet BOD concentration to reach 1 ppm?
Determine the characteristics of a unit composed of 2 desilting channels treating a peak wastewater flow of 1500 L7s. A surface load of 40 m/h is assumed. The effective head or depth "P" is set at 1.5 m. Calculate: 1. Area of each channel 2. 2. Effective volume of each desanding channel 3. HRT 4. Cross-sectional area of each desanding channel 5. 5. Width of each channel.
The average design flow at a wastewater treatment plant facility is 1.5 m3/s. The bar rack is mechanically cleaned with an average clear spacing of 2.5 cm. Estimate the average quantity of screenings that will be collected at each day.
A wastewater treatment plant discharges of effluent into a stream. Just upstream from the discharge point, the stream has an ultimate BOD of 5 mg/L.Assuming a cross-sectional area for the stream equal to 100 m2, what ultimate BOD (in mg/L) would you expect to find at a point of 15,000 m downstream? Wastewater Flow: 1 m3/secBOD (ultimate): 40 mg/LRiver Flow: 10 m3/secDeoxygeneation constant kd: 0.22 day-1
If a dairy processing factory produces an average of 246 md of wastewater with a BODs of 1400 mg/lt. Assuming that per capita daily sewage flow is 110 It and the per capita daily BOD 5 contribution is 40 grams, the ratio of (BOD)5 equivalent population and hydraulic equivalent population is (Answer upto two decimal places)
Estimate the maximum and minimum design wastewater flow rates from a 65 ha residential development that when fully developed will consist of 10% large lots (6 persons/ha), 75% small single- family lots (75 persons/ha), and 15% small two-family lots (125 persons/ha). The average wastewater flow rate when the sewers are first installed is expected to be 30% of the average wastewater flow rate when the area is fully developed. Assume an average per-capita flow rate of 350 (L/d/person). Neglect I/I.
the BOD2 and BOD6 of a sewage sample is 250 mg/L and 50 mg/L respectively.calculate BOD after 4 days
Consider a rectangular wastewater treatment pond having a length of 100 ft,width of 20 ft, and depth of 20 ft. Assume the discharge from a wastewater treatment plant has aflow of 30 MGD with a solids concentration of 5 mg/L.a) Determine the mass flow rate of solids discharged in ton per day?b) Calculate the residence time of the pond in minutes?
The BOD 2 and BOD 6 of a sewage sample is 250 mg/L and 50 mg/L respectively.Calculate BOD after 4 days?

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