Design a circular radial-flow sedimentation tank for a town with a projected population of 45,000. Assume that the wastewater flow rate is 400 L/capita-d. Design for 2 h detention at the average flow. Determine the tank depth (m) to produce an overflow rate of 36 m³/m²-d for average flow. Assume standard tank dimensions to fit mechanisms made in diameter increments of 1.0 m and in depth increments of 0.5 m.

Design a circular radial-flow sedimentation tank for a town with a projected population of 45,000. Assume that the wastewater flow rate is 400 L/capita-d. Design for 2 h detention at the average flow. Determine the tank depth (m) to produce an overflow rate of 36 m³/m²-d for average flow. Assume standard tank dimensions to fit mechanisms made in diameter increments of 1.0 m and in depth increments of 0.5 m.

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

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.
A primary clarifier for a municipal wastewater treatment plant is to be designed for an average flow of 7570 m3/d. the regulatory agency criteria for primary clarifiers are as follows: peak overflow rate = 89.6 m3/m2.d, average overflow rate = 36.7 m3/m2d, minimum side water depth = 3 m, and peak weir loading rate = 389 m3/m.d. The ratio of peak flow to average flow = 2.75. Determine: Diameter of the sedimentation basin The length of the peripheral weir. Assume that the weir launder has a width of 50 cm (from the tank side), and the weirs are installed on one side of the launder.
Wasterwater Engineering Civil engineering
A rectangular sedimentation basin is to be designed for a secondary wastewater treatment plant. The average flow is 30 000 m3/d, the surface loading rate is 24 m3/m2-d, and the retention time is 6 h. Two sludge scrapper mechanisms for square tanks are to be used in tandem to give a rectangular tank with a length to width ratio of 2:1. Determine the dimensions of the basin.
The sewage is flowing at the rate of 5 MLD from a sedimentation tank to a single standard rate trickling filter. BODI=180 mg/L OLR=200 g/m³/day and surface loading rate is 3000 L/m²/day. Determine the depth of the filter.
Design a wastewater treatment primary clarifier for an average flow rate of 1.10 MGD,and a peak hourly flow rate that is 3.1 times the average flow rate. Pertinent parametervalues selected for design include a peak hourly overflow rate of 1800 gpd/ft2, maximumhourly weir loading rate of 30,000 gpd/ft, minimum tank depth of 7.0 ft. Determine;a. Minimum clarifier diameter (ft).b. Clarifier diameter (ft) if collector mechanisms are available only in 5.0 ftincrements of diameter.c. An appropriate side water depth (ft), i.e., the tank depth excluding the coneshaped bottom.d. If the peak hourly weir loading rate is acceptable when using a peripheral weir.
A primary circular clarifier for a municipal wastewater treatment plant is to be designed for an average flow rate of 3570 m³/d. Given the surface loading rate is 35 m³/day.m² and assume that the peak flow factor is 2.5. Calculate: 1) Peak Flow Rate 2) Surface Area of the Clarifier 3) Diameter of the clarifier
A municipal wastewater treatment plant has an average flow of 0.5 m3/s, and two aerated grit chambers are to be used in parallel. Dual units are to be provided for flexibility in operation, since one could be used, should the other require temporarily maintenance. During normal operation, both chambers would be used. Each chamber is to be a rectangular tank with spiral-roll flow. The peak flow is 2.4 times the average flow. The tank width is 2 times the depth, and the length is 4 times the width. Determine tank width in meters, if the detention time is 3 min. Determine the total air flow in m3/min, if 0.35 m3/min per meter of tank length is to be provided.
Design a rectangular sedimentation tank (L/W is 4) for a max weekly flow with a hydraulic retention time of 3 hours, and a surface overflow rate of 50 m3/m2.d for a town with a population of 250,000 and average daily water demand is 450 L/capita. The monthly, weekly, and daily factors are 1.2, 1.4, and 1.8, respectively. The area of each tank should be limited to 8000 m2. Determine the tank dimensions (L,W, and D) and the number of tanks needed. What is the horizontal flow-through velocity in the rectangular basin
please answer ASAP
Question
Problem 2. Using a surface overflow rate of 26.00 m/d and a detention time of 2.00 hours, size of a sedimentation tank for the average flow rate of 0.400 m3/s would be: (assume a Length to Width Ratio of 5) a. Volume---- b. Depth- c. Width- d. Length- --cubic meter ----meter ------meter ----meter