A system of rapid sand filters are designed to cater to a population of 2 million with anaverage demand of 2001pcd. Backwashing is done daily for 30min and it consumes 5%of filtered water each day. Design loading rate onto the filters is15000/h.mTaking a peak factor of 2 for the water demand, the surface area requirement for thetreatment of water is

Answered: Image /qna-images/answer/9f565afe-754f-4593-a414-6e71d3604142.jpg

A system of rapid sand filters are designed to cater to a population of average demand of 200lpcd. Backwashing is done daily for 30min ar of filtered water each day. Design loading rate onto the filters is 5000-1/2/h. m Taking a peak factor of 2 for the water demand, the surface area requ

A system of rapid sand filters are designed to cater to a population of average demand of 200lpcd. Backwashing is done daily for 30min ar of filtered water each day. Design loading rate onto the filters is 5000-1/2/h. m Taking a peak factor of 2 for the water demand, the surface area requ

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter11: Ground Improvement

Section: Chapter Questions

Problem 11.7P

See similar textbooks

Related questions

Q: Using the Dunne Equation, find the daily evaporation rate for a lake given that the mean value for…

A: The objective of the problem is to determine the daily evaporation rate for a lake using the Dunne…

Q: The in-situ two way vane shear test was conducted on a clay with the vane of 50mm diameter and 100mm…

Q: For Problem 1, the pan coefficient is 0.70. What is the lake evaporation (in inches and ft³) for the…

A: The objective of the problem is to determine the lake evaporation over five days for a lake with a…

Q: Consider the following beam ABC, loaded as shown in figure. The cable passes over a small…

Q: A 1 : 100 scale model of river is to be tested in a laboratory. The highest flood in river is 1000…

A: The given data for the river model testing is:Highest flood in the actual river = 1000 m³/sScale of…

Q: Alum at a rate of 20 mg/l is added to an incoming discharge of 0.5 m3/s which carries 250 mg/1 of…

A: 1. Alum added at a rate of 20 mg/l.2. Incoming discharge: 0.5 m³/s3. Incoming discharge carries 250…

Q: The Atterberg limits of a soil sample are: Liquid limit, w = 50% Plastic limit, w = 30% P Shrinkage…

Q: The static and stagnation pressures of a fluid in a pipe are measured by a Piezometer and a Pitot…

Q: a) Determine the ultimate moment capacity of the section if lateral support provided at the ends…

A: beam section fy = 345 Mpaloading = factored loadingother data present in the figureNeed to find1-…

Q: A point load is 200 KN acts on the ground surface. The ratio of maximum vertical stress (in kN/m²)…

Q: A railway line is laid so that there is no stress in the rails at 8°C. The rails are 30 m long. Take…

Q: Determine the increase in vertical stress (kPa) 6 m below the corner of a rectangular foundation 4 m…

A: The increase in vertical stress due to UDL below the corner of rectangular foundation can be…

Q: A completely mixed activated sludge process operating at equilibrium is designed to treat 300 MLD of…

Q: A fluid of specific gravity 0.8 is flowing in a pipe. The pressure drop across a flow secti between…

A: Given:- Reading of manometer=X=0.5 m Specific gravity of flowing fluid=S= 0.8 Specific gravity of…

Q: A square pile group of 9 piles passes through a recently filled up material of 3.5 m depth. The…

A: A square pile group of 9 piles,Depth of pile = 9 m,Depth of soil fill =3.5 m,Diameter of the pile=30…

Q: Air flows at a temperature of 15°C with a uniform velocity of 12 m/s over a flat plate, whose length…

A: Given data:Temperature of air (T): 15°CVelocity of air over the flat plate (V): 12 m/sLength of the…

Q: A soil has a specific gravity of 2.7 and a water content of 5%. To compact the soil to a dry density…

A: 1. Specific gravity of the soil: G=2.72. Water content of the soil: w= 5%3. Target dry density for…

Q: A retaining wall with a smooth vertical back retains silt backfill for a depth of 6m. The backfill…

Q: A sample of 1 litre is drawn from the aeration tank and is then allowed to settle for 30 min. The…

Q: A dry sandy soil is placed inside a 5 cm × 5 cm × 5 cm cube in it’s loosest possible state to occupy…

A: Here is the given data from your question:1. Initial weight of the dry sandy soil in the loosest…

Q: ↑ LIM 93.34 KN 0.90m + 0.40m, 11.31 KN ↑ W = 53,52 x 1₁2 = ↑↑↑↑ ↑ ↑ 64.22 KNM⇒ 65 KNAM

A: A beam is given we need to find out the shear force and bending moment diagram

Q: Can you please show me the full solution of Rah and RAV in the reactions and the PAB, PAC, PBD, AND…

A: The actual representation of the values are ;Consider sum of horizontal reactions = 0 From Provided…

Q: As an owner should construction costs or life safety be top priority?

A: As an owner, deciding whether construction costs or life safety should be the top priority involves…

Q: A rectangular channel of 6 m width carries a uniform flow at a normal depth of 3 m. If the channel…

A: Width of the channel before contraction = 6 m Normal depth of flow in the channel before contraction…

Q: Draw the figure to an enlarged scale in Isohyetal method

A: The iisohyetal approach is a technique for calculating the average amount of precipitation within a…

Q: 2. Select the most economical (lightest) W sections of A572 Gr. 50 steel. The beam is braced at ends…

A: A572 Gr. 50 steelLb = 15'WDL = 3 klfWLL = 1 klf

Q: SOLVE FOR THE FORCE IN MEMBER XY AND YZ

Q: A system of rapid sand filters are designed to cater to a population of 2 million with an average…

Q: A cut is to be made in pure clay having cohesion of 40 kN/m². The unit weight of soil is 20 kN/m³.…

A: 1. Cohesion of pure clay: 40 kN/m²2. Unit weight of the soil: 20 kN/m³3. Side slope of the cut: 1.5H…

Q: The total available moisture on a certain area on Day 1 is at its maximum value of 23.25 cm. The…

A: Solution:Given:The total available moisture is TAW=23.25cm=232.5mmThe reference crop…

Q: A square pile group of 9 piles passes through a recently filled up material of 3.5 m depth. The…

A: A square pile group of 9 piles,Depth of pile = 9 m,Depth of soil fill =3.5 m,Diameter of the pile=30…

Q: 9.4. Let the crane hook in Fig. E9.2 have a trapezoidal cross section as shown in row (c) of Table…

A: given working stress limit is 150Mpa

Q: A compression member 3 m. long consists of two angles L 6 x 4 x 1/2 mm with long legs back to back…

Q: An oil of viscosity 0.01 Ns/m² is flowing between two stationary parallel plates 2 m wide maintained…

Q: 2. Draw the FBD of the given 3D system. Solve for the equations of equilibrium. Determine the…

Q: 9.9. A curved beam with a rectangular cross section strikes a 90° arc and is loaded and supported as…

Q: Problem: Draw the shear & moment diagram of the beam as loaded below, Indicate values show…

Q: A cylindrical specimen of saturated clay 4.5 cm in diameter and 9 cm long, is tested in an…

Q: The amount of chlorine residual remaining when gases start evolving during disinfection and when…

A: The amount of chlorine residual remaining when gases start evolving during disinfectionand when they…

Q: A long, slender structural aluminum[E=69GPa] flanged shape is used as a L=8.0-m-long column. the…

Q: A smooth vertical wall 5 m high retains a soil with C = 5 kN/m², = 27° and y = 18 kN/m³. The…

A: Given data:Height of the smooth vertical wall (h) = 5 mCohesion of the soil Angle of internal…

Q: The piece of rubber is originally rectangular. Calculate the average shear strain Yxy at A if the…

Q: A pipeline carrying water has an average height of irregularities projecting from the surface of the…

A: Average height of irregularities projecting from the surface of the pipe,h= 0.155 mmFor pipe surface…

Q: A cut is to be made in pure clay having cohesion of 40 kN/m². The unit weight of soil is 20 kN/m³.…

Q: A sewage sample is tested for BOD5 at 20°C in laboratory and the data obtained are as follows:…

Q: Problem 1: Please determine the moment generated at O from the force applied to the triangular rigid…

Q: • Waterworks of a town treat 35 x 106 litres/day. The water is treated by coagulation-sedimentation…

A: Given data - Q = 35×106 L/day Consumed filter alum = 20 mg/L Alkalinity of water = 4.5 mg/L of CaCo3…

Q: 1.5 Deflection checks are crucial in engineering and construction? why discuss briefly

A: The objective of discussing the importance of deflection checks in engineering and construction is…

Q: 9.3. The curved beam in Fig. P9.3 has a meter. The inside diameter of the c stress at B for P= 20…

Q: For a given stress tensor the minimum principal stress is 50 20 200 20 40 unit.

Concept explainers

Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.

Question

A system of rapid sand filters are designed to cater to a population of 2 million with an
average demand of 2001pcd. Backwashing is done daily for 30min and it consumes 5%
of filtered water each day. Design loading rate onto the filters is
1
5000/h.
m
Taking a peak factor of 2 for the water demand, the surface area requirement for the
treatment of water is

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Determine the surface area requirement for the treatment of water

VIEW

Step 2: Determine the surface area requirement for the treatment of water

VIEW

Solution

VIEW

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

A water treatment plant has a horizontal-flow sedimentation tank with an overflow rate of 30 m3 /d.m2 and wishes to remove particles that have settling velocities of 0.2 mm/s. Calculate the percentage of removal that should be expected for each particle in the ideal sedimentation tank.
Environmental Engineering -1 Plz, answer both parts. 1.a. Explain the most important characteristics in the design of a sedimentation tank? b. Describe typical rapid sand filter operation and back wash operation, Elaborate the problems associated with the Rapid Sand Filter operation?
The diagram of a sand drain is shown in Figure 7.32. If rw = 0.3m, de = 6m,cv = cvr = 0.28 m2/mo, and H = 8.4 m, determine the degree of consolidationcaused only by the sand drain after 7 months of surcharge application.
Design a slow sand filter system for a community which has a projected population of3000 and an average water consumption of 300 Lpcd. Use Goodrich formula to estimatethe peak flow rates and size the system so that it can produce water at a maximum weeklyrate with on one unit out of service. The design filtration rate is 6 m/d at max daily flow
You as an engineering technologist at a water treatment plant, you are required to design a horizontal-flow sedimentation tank with the optimum process. Demonstrate FOUR important zones and explain thoroughly their importance to design the good quality of sedimentation tank.
A rectangular sedimentation tank is designed with a depth of 3.5 mand a detention time of 1 h. Is the design suffcient to achieve complete removal of particles with a diameter of 0.01 mm? Specifc gravity of the particles is 2.65. The fow rate and temperature of waterare 10,000 m3/d and 20°C, respectively. At 20°C, density of water is998 kg/m3 and dynamic viscosity of water is 10–3 kg/m·s. State anyassumptions you make to calculate your results.
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.
Water inflow to the sedimentation tank is 0.1X m³/sec, water retention time is 1X0 min and depth of the tank is 2.X m. What is the volume and surface area of the tank? What is the overflow rate of tank in m³/day.m² and what is a removal efficiency of particles with the sedimentation velocity 0.0003m/s.X=6 Hand written solution only
2- Explain scouring in the sedimentation tank
What is the required surface area of a sedimentation tank (in ft2, no decimal point) for water with a flow rate of 7.6 MGD, a solid concentration of 10 mg/L, and the required overflow rate is 800 gpd/ft2?
</o:p> Use Horton’s infiltration equation to compute the total infiltrated water (in inch per unit area) during a period of 75 minutes from the beginning of a rainfall event having a constant rainfall intensity of 1.2 in/hr. The soil has parameters fo = 1.0 in/hr, fc = 0.25 in /h and k = 0.26 hr-1 . When does ponding occur during this storm?</o:p>
Estimate the clean filter headloss for a proposed new sand filter using the sand. Use thefollowing assumptions: loading rate is 216 m3/d.m2, specific gravity of sand is 2.65, the shapefactor is 0.82, the bed porosity is 0.45, the water temperature is 10oC, and the depth of sandis 0.5 m.