A water treatment plant processes 21,000 cubic meters of water per day. Assume two types of flocculated particles enter the basin. You are asked to evaluate the performance of a rectangular sedimentation basin that has dimensions of depth=4 m, width= 6 m, and length= 40 m. The first type of particles has a settling velocity of 0.5 m/hr and the other type has a settling velocity of 1.8 m/hr. What percent of particles are removed for each of the two types of particles?

A water treatment plant processes 21,000 cubic meters of water per day. Assume two types of flocculated particles enter the basin. You are asked to evaluate the performance of a rectangular sedimentation basin that has dimensions of depth=4 m, width= 6 m, and length= 40 m. The first type of particles has a settling velocity of 0.5 m/hr and the other type has a settling velocity of 1.8 m/hr. What percent of particles are removed for each of the two types of particles?

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter2: Origin Of Soil And Grain Size

Section: Chapter Questions

Problem 2.15P: Repeat Problem 2.14 with the following values: Gs = 2.75, temperature of water = 21C, t = 88 min,...

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1. You are trying to remove 10.0 um diameter particles in a water treatment plant. The water is at 15°C, and the particle density is 1.35 g/mL. The plant treats 0.100 m³/s of water. It is proposed to use a 3 m deep, rectangular sedimentation tank with a length to width ratio of 6:1. a. What is the minimum required width of the basin? b. What would be the minimum required width if the water in this problem was 25°C, instead of 15°C? omil novig c. If you designed the system for 15°C (as in part a) and then the plant received 30°C water, what percent of particles would be removed by the system, assuming no change to the particles themselves?
A hydrometer test has the following result: Gs = 2.75, temperature of water = 23°C, and L = 12.8 cm at 100 minutes after the start of sedimentation (see Figure 1.5). What is the diameter D of the smallest-size particles that have settled beyond the zone of measurement at that time (that is, † = 100 min)?
A sedimentation basin in a water treatment plant has a length = 50 m, width = 10 m, and depth = 4 m. Particle density = 1.1x10 kg/m'; water density = 10' kg/m2; and dynamic viscosity = 1.307x10-3 N.sec/m2. What is the flow rate, Q, that would remove 70% of particles with a diameter of 0.4 mm?
In a hydrometer test, the results are as follows: Gs=2.55 Temperature of water=25 degree Celsius, and R=41 at 2 hours after the start of sedimentation. What is the diameter, d, of the smallest-size particles that have settled beyond the zone of measurement at that time? Please answer this asap
Please answer all 1. List the three corrections which should be applied to the hydrometer readings. 2. Why is it important to remove the hydrometer from the measuring cylinder between readings? 3. A hydrometer test has the following results; Gs = 2.70, temperature = 240C, and L = 92 mm at 60 minutes after the start of sedimentation. Calculate the diameter of the smallest-size particles that have settled beyond the zone of measurement at that time (use the table in the lab manual to find, A=0.0128). D(mm) = A sqrt( L(cm) / t(min) )
3. A sediment laden water is to be treated in a sedimentation tank with Type I settling characteristics. The tank is 35 m. long and 20 m. wide with a depth of 5 m. A controlled constant flow rate of 3.5 m³/s passes through the tank. A particle size analysis has been made and the results are listed in the table below: Dp (m) 0.00005 0.00007 0.00009 0.0001 0.0002 Mass Concentration (mg/L) 100 200 300 200 100 Assume that the particle densities are all 2,000 kg/m³ and the dynamic viscosity of water is 0.001 Ns/m². (a) Determine the effluent particle size distribution and the effluent sediment concentration by using a spreadsheet or writing a QuickBASIC program. (b) Determine the particle removal efficiency (%) of the tank.
Repeat Problem 2.14 with the following values: Gs = 2.75, temperature of water = 21C, t = 88 min, and L = 11.7 cm. 2.14 A hydrometer test has the following result: Gs = 2.65, temperature of water = 26 C, and L = 10.4 cm at 45 minutes after the start of sedimentation (see Figure 2.25). What is the diameter D of the smallest-size particles that have settled beyond the zone of measurement at that time (that is, t = 45 min)? Figure 2.25 ASTM 152H type of hydrometer placed inside the sedimentation cylinder (Courtesy of Khaled Sobhan, Florida Atlantic University, Boca Raton, Florida)
Write the Rouse's equation for distribution of Suspended sediment in the vertical of a channel and label all the terms. In a wide alluvial channel having suspended sediment load, the depth of flow is 2.8 m. If a suspended load sampler indicated concentration of 700 ppm at a point 30 cm below water surface, estimate the concentration at a point 10 cm above the bed in the same vertical. The exponent in Rouse's equation can be assumedsas 0.4. CS Scanned witA
Please solve fastly You are an oil and gas exploration reservoir engineer and your manger asked you to calculate the porosity for the following reservoir. Seismic data have been used to delineate reservoir structure (The length of this reservoir is about 200 meter, thickness is 1 meter and width is 0.8 km). A- Calculate the bulk volume of the reservoir in m3 . Make sure all the unit is consistent with each other. B- Assume that the pore spaces of the sediment in the oil-bearing unit are full of oil 32000m3. Calculate the porosity of the reservoir. C- Based on the porosity value. Is this negligible, poor, fair , or very good reservoir ( try to find table for reservoir classification based on porosity value)
QUESTION 1 For the hydrometer test results after 60 minutes from the beginning of the sedimentation is 42.50 Obtained test results as follows: Gs=2.65 • Temperature, T = 26°C •L = 10.8cm Determine the size (Diameter, D) of the smallest-size particles that have settled beyond the zone of measurement at the time of 60 min?
For the rectangular horizontal-flow sedimentation basin and influent particle-settling characteristics given, calculate the particle removal efficiency. Parameter Flow rate, m3/day 7,570 Length, m 30 Width, m 5 Settling Velocity, m/h Number of Particles, #/mL 0.2 560 0.6 720 1.0 880 1.4 1110 1.81320 32.2 1110 2.6 620 3.0 440 3.4 320 3.8 160
Еxample A rectangular sedimentation tank with W=25m, L=50m and h=3m. The flow rate = 1500 m/h, and the influent particles concentration = 2000mg/l. The following table shows the percentage of particles as a function of his diameter: Volume of particle (mm) 0.001 10 0.005 20 0.01 15 0.015 15 0.02 20 0.025 20 Find: 1) Settling velocity, if particles density = 2650 kg/ m’ and viscosity of water = 1.002*10*N.s/m? 2) Percentage removal for each particle and total percentage removal 3) Sludge depth, if the tank is cleaned one time per month. If percentage of solide = 8% and sludge density = 1150 kg/ m³ 4) Effluent concentration particles