A water supply board is responsible for treating 1500 m3/day of water. A settling column analysis indicates that an overflow rate of 20 m/day will produce satisfactory removal for a depth of 3.1 m. It is decided to have two circular settling tanks in parallel. Find the required diameter (expressed in m) of the settling tanks.

A water supply board is responsible for treating 1500 m3/day of water. A settling column analysis indicates that an overflow rate of 20 m/day will produce satisfactory removal for a depth of 3.1 m. It is decided to have two circular settling tanks in parallel. Find the required diameter (expressed in m) of the settling tanks.

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

3 A water supply board is responsible for treating 1500 m³/day of water. A settling column analysis indicates that an overflow rate of 20 m/day will produce satisfactory removal for a depth of 3.1 m. It is decided to have two circular settling tanks in parallel. The required diameter (expressed in m) of the settling tanks is
4. A settling chamber is to be 2 m wide, 7 m high, 13 m long and has 10 trays, including the bottom surface. This chamber is designed to collect particles of 1600 kg/m' density of a stream of 5 m/s. There is 2 cm dust layer on the trays. a. Compute the Reynolds number and decide if the turbulent flow assumption is reasonable b. Find the diameter of the particles that are collected with 0.90 efficiency.
Don't copy from other solutions thank you. Three piezometers have been installed in the confined aquifer having a uniform thickness of 4.6 m. and hydraulic conductivity of 2 x 104 m/s. a) Compute the hydraulic grądient. b) Compute the transmissivity in m2/day. c) Compute the flow rate per unit width of the aquifer in liters/day.
Three piezometers have been installed in the confined aquifer having a uniform thickness of 4.6 m. and a hydraulic conductivity of 2 x 104 m/s. Be 140m 61m S10m 235m C EL 12292m EL 122.03m E 120.5 Im Aquiclude Aquifer 6m Aquiclude a) Compute the hydraulic gredient. b) Compute the transmissivity in m2/day. c) Compute the flow rate per unit width of the aquifer in liters/day.
49. A pumping test was made in a sand layer extending to a depth of 16m. The initial groundwater table was located 2m below the ground surface. Observation wells were sighted at distances 4m and 9.5m from the pumping well. Using a discharge of 0.4 cubic meters per hour, a steady level is attained at the pumping well. The measured drawdowns at the two observation wells are 2m and 0.25m respectively. Determine the coefficient of permeability of the soil.
Calculate in units of hours the hydraulic retention time at peak flow in a settling tank based on the following information The settling tank is rectangular with 5 m depth. The surface loading rate is 20 cubic meters per square meter and per day at dry weather flow (DWF). Peak flow is 2 times the DWF.
b. An aquifer with a potentiometric surface is 50 m thick and 500 m wide. Two observation wells are located 1400 m apart in the direction of flow. Head in the first well is 50m and in the second well is 42m. Hydraulic conductivity is 0.7 m/d. Effective porosity of the medium is 20%. Determine the total flow of the water through the aquifer. Also determine the actual groundwater velocity between the two wells.
Need help with C. 8. An aquifer has a hydraulic conductivity of 12 ft/d and an effective porosity of 17% and is under a hydraulic gradient of 0.0055. (A) Compute the specific discharge. (B) Compute the average linear velocity. (C) The water temperature is 14°C and the mean pore diameter is 0.33 mm. Is it permissible to use Darcy's law under these circumstances? What is the reason for your answer?
A rectangular settling tank without mechanical èquipment is to treat 1MLD of raw water. . t = = 2.5 hr. V= 8 cm/min Depth of water + Sediment = 4.5 m Find length tank, the width of tank. If an allowance of 1.5 m is to be made for sediment, overflow rate of the tank.
2. An artesian well is pumped at the rate of 25 liters/sec. at observation wells 170m and 340m away the drawdowns noted are 0.83m and 0.67m respectively. The average thickness of the aquifer at the observation wells is 6.5 meters. Compute the coefficient of permeability of the aquifer if the water level was 15 meters before pumping. 340 m 170 m Q= 25 liters normal hyd. grade line 0.83 15m h2 hi impermeable layer t= 6,5 mm Aquifer
6.8 Calculate the hydraulic detention time (0) of a CSTR with settled-solids recycle if Y = 0.6 g VSS,/g BOD,| ĝ = 20 g BOD,/g VSS,-d K = 20 mg BOD¸/1 b = 0.25/d f, = 0.8 S° = 10,000 mg BOD,/1 X_ = 4000 mg/1 X = 0 0. = 6 d Q = 1000 m³/d %3D Discuss the practicality of treating this rather high-strength soluble wastewater by this method.
B) in an oil - water system, the following fluid and sand data are available: h=D75 ft, hp-15 ft, po=47.5 lb/ft, Pw=63.76 lb/ft, Ho=0.73cp, Bo=1. bbl/STB, rw=3 in, re=1000 ft, ko=D93.5 md calculate: the oil critical rate using Chaney method.