: Design a sanitary sewer for a City “A”, using the following data: - Population of the city = (8000) persons - Average water consumption, Qavg-water = (80) Lpcd - Industrial area, Aind = (8000) m2 - Area for commercial activities, Acom = (40) ha - Use Manning’s roughness co-efficient, n = 0.013 Diameter (m) of the sewer =? Slope of sewer = 1 in ?

: Design a sanitary sewer for a City “A”, using the following data: - Population of the city = (8000) persons - Average water consumption, Qavg-water = (80) Lpcd - Industrial area, Aind = (8000) m2 - Area for commercial activities, Acom = (40) ha - Use Manning’s roughness co-efficient, n = 0.013 Diameter (m) of the sewer =? Slope of sewer = 1 in ?

Sustainable Energy

2nd Edition

ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter11: Hydroelectric Energy

Section: Chapter Questions

Problem 4P

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Q#1: Design a sanitary sewer for a City “A”, using the following data: - Population of the city = (18300) persons - Average water consumption, Qavg-water = (18300/100) Lpcd - Industrial area, Aind = (18300) m2 - Area for commercial activities, Acom = (18300/200) ha - Use Manning’s roughness co-efficient, n = 0.013
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.
Using the ASCE and Griff methods, estimate the average, peak, and low rates of flow in the sewer system of the city of Columbia with a population of 132000. Additionally, use the peaking factor method (ten-states) to estimate the peak flow. Assume the national public water consumption average of 120gpcd. Assume a spent water to freshwater ratio of %60.
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
20 cm diameter sewer with invert slope of 1 in 500 is running full. Calculate the rate of flow in the sewer Compare the velocity with self-cleansing velocity. Assume Manning's n = 0.012. Assume, average size of solids to be 1 mm.
Q1.Design a trickling filter for treating 5 million litres of sewage per day. The B.O.D. of sewage is 144 ppm. Q2.Determine the ultimate B.O.D. for a sewage having 5-day B.O.D. at 20°C as 200 p.p.m. Assume R20 = 0.1 per day. Q3. Given the following data, calculate the 5-day B.O.D. of the unseeded sample of sewage: Initial DO…………….. 10 mg/1 Final DO…………… 4 mg/1 Bottle volume ………….300 ml Sample volume………….6 ml.
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?
Irrigation and drainage, i need solutions in 15 minutes please. MCQ/Using Dupuit formula find the drain spacing for the following data 1- Coefficient of permeability = 0.3 m/day 2- Recharge required to be removed per unit area q = 0.84 cm per day 3- Impermeable layer depth below ground surface = 5 m 4-Distance from ground surface to the centerline of the drain = 1.5 m 5-The water table should be 0.6 m below the ground level. The answer is * A-22.50 m B-34.20 m C-31.90 m D-44.70 m
A community normally levies a sewer charge of 20 cents/m3 ($0.20/m3). For discharges in which the BOD > 250 mg/L and suspended solids (SS) > 300 mg/L, an additional $0.50/kg BOD and $1.00/kg SS are levied. A chicken processing plant uses 2000 m3 water per day and discharges wastewater with BOD = 480 mg/L and SS = 1530 mg/L. What is the plant’s daily wastewater disposal bill?
Sewerage waste was discharged into Mulungushi River from Iris lodge which is located along the banks of the river as they had a problem with a septic tank since it was full. This problem normally occurs in the rain season and this resulted in a mixture having DO of about 9mg/L. The average occupancy rate monthly is about 70%. The septic tanks are emptied after every two weeks. After 5 days, DO dropped to 3mg/L when ZEMA carried out the analysis of the water sample in the river. The reaction constant rate k was found to be 0.22 day ^(-1) and the oxygen consumed in the first five days was 200mg/L. a) How do suspended solids and chemicals affect the surrounding environment? Give two examples. b) What would be the ultimate carbonaceous BOD? c) What will be the remaining oxygen demand after 5 days? d) What advise can you give to the to the lodge owner as a Civil Engineer?
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 circular shaped clarifier is used to treat waste water at a rate of 5000 m3/day. Determine the diameter of the clarifier if the overflow rate of the clarifier is 35 m3/m2/day.