Answered: A detention pond is designed to achieve…

A detention pond is designed to achieve 100% removal of 0.1 mm fine sand particles at the design flow rate. What is its removal rate for 0.2 mm fine sand under the same flow rate

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: Calculate the settling velocity of the sandy materials present in the wastewater inside the grit…

Q: A settling basin is designed based on a surface overflow rate that can achieve a removal efficiency…

Q: settling basin is designed based on a surface overflow rate that can achieve a removal efficiency of…

A: d1=0.05mm d2=0.1mm

Q: Example 9.18. A rectangular sedimentation tank following coagulation- flocculation is to treat a…

Q: A water filtration unit is made of uniform-size sand particles of 0.4 mm diameter with a shape…

Q: Design a aerated grit chamber for a wastewater treatment plant where the incoming average flow rate…

A: Given: Incoming average flow rate = 0.8 m3/s. Peak factor = 2.5 Detention time = 225 sec Width to…

Q: During a constant head permeability test on a sand sample, 260ml of water was collected in 2 min. If…

Q: Calculate bentonite volume that must add to 1000 bbl of water base mud to increase its weight from…

Q: Design a grit chamber for population 80000 with water consumption of 200 LPCD, with maximum flow of…

Q: A mechanically cleaned bar rack screen is installed ahead of a velocity controlled grit chamber. The…

A: Spacing between bars is 20 mm. The thickness of the bars is t=10 mm. Depth of flow upstream is 1.45…

Q: Question : a) Briefly discuss the significance of determining falling head permeability (hydraulic…

Q: A rectangular sedimentation tank following coagulation flocculation is to treat a flow of 3000 m3 /…

Q: falling head permeability test was run on a soil sample 11.4 cm. in diameter and 13.3 cm. long. The…

Q: In a permeability test conducted on a soil with e = 0.50 the discharge velocity was found to be 2.4…

Q: The hydraulic retention time in the primary sedimentation tank is: Select one: а. 1-2 h b. depends…

A: Hydraulic retention time (HRT) is a measure of the average amount time of time that the…

Q: When drainage is permitted throughout the triaxial test, the test is known as A. Quick test B.…

A: A triaxial test is a test conducted on soil to determine shear strength . This test has control on…

Q: falling head permeability test was run on a soil sample 12.4 cm. in diameter and 14.9 cm. long. The…

Q: State the two major purposes of sludge stabilization.

A: We have to determine the major purpose of sludge stabilization.

Q: A grit chamber of rectangular cross-section is to be designed to remove particles with diameter of…

A: Given data- Diameter of particles d=0.25 mmG=2.70settling velocity Vs=2.5 cm/swidth of chamber…

Q: A mechanically cleaned bar rack screen is installed ahead of a velocity controlled grit chamber.…

A: Given: Thickness of bars, t=10 mm=0.01 m Spacing between bars, S=20 mm=0.02 m Depth of upstream…

Q: Example 9.18. A rectangular sedimentation tank following coagulation- flocculation is to treat a…

Q: For a falling head permeability test find the value of permeability in (mm/sec) if the initial…

Q: Field Permeability Testing: Calculate the permeability of the soil from a confined aquifer given the…

Q: For a variable head permeability test. the following values are given: length of specimen = 380 mm,…

A: Given data : Initial head (h1)=640 mmFinal head (h2)=310 mmCoefficient of permeability (K)=2.92×10-3…

Q: Design a grit chamber for a wastewater treatment plant with an average fow rate of 25,000 m3/d and a…

A: Given: Avg. Flow Rate=25000m3/day Peak Flow Rate =50000m3/day Detention time at peak flow=3min…

Q: A grit chamber of rectangular cross-section is to be designed to remove particles with diameter of…

Q: ex . Design an aerated grit chamber for treating municipal waste water with average flow rate of 0.5…

Q: Constant head permeability tests were performed height of the two specimens (Ls1: Ls2) is 1.5, the…

Q: Rapid Sand Filter - Example

A: Given: Total Flow= 20 mgd = 20 * 10 6 gallons per day Hydraulic Loading= 5gpm/ft2 =5*24*60 gallon…

Q: A falling head permeability test was run on a soil sample 9.6cm in diameter and 10cm long. The head…

Q: how do these factors affect the results of analysis by sieving method? give a brief explanation to…

A: Solution: The distribution of aggregate particles by size within a sample is determined using a…

Q: )A rectangular grit chamber is designed to remove particles with a diameter of 0.2 mm, specific…

Q: 3. A falling-head permeability test was run on a soil sample 9.6 cm in diameter and 10 cm long. The…

Q: A detention pond is designed to achieve 100% removal of 0.1 mm fine sand particles at the design…

A: Given in the Question: Fine sand particle diameter = 0.1mm Design flow rate = Q Pond Flow rate= 2Q…

Q: Design a slow sand filter to treat a flow of (96) ft3/day? Assume a filtration rate of 0.16 m/hr.

A: Solution:- Filteration rate=0.16 m/hr Average daily flow=96 ft3/day Maximum daily…

Q: Show calculation on how to determine the average coefficient of permeability of the sand sample at…

A: Solution: Given Data Length of specimen=127 mmArea of specimen=7854 mm2Specific gravity of…

Q: Determine the total volume of an aerated grit chamber for a wastewater treatment plant with an…

A: Introduction The grit chamber is the second unit operation in the primary treatment of wastewater.…

Q: Design a grit chamber to remove sand particles (pp = 2650 kg/m³) with a mean diameter of 0.21 mm.…

Q: Is it suitable to perform constant head permeability test on clayey soil to determine its hydraulic…

Q: Design a circular type sedimentation tank: A city must treat about 20,000 m^3/d of water and…

Q: 1. What is the full form of NPSH? a) Net pipe suction head b) Net positive suction head c)…

Q: Determine the total volume of an aerated grit chamber for a wastewater treatment plant with an…

A: This problem is related to wastewater treatment from Environment Engineering. In this question given…

Q: 3. A falling-head permeability test was run on a soil sample 9.6 cm in diameter and 10 cm long. The…

Q: The bed slope of a regime channel is in 5800 Determine the channel section proportion b/d and…

A: Given: Bed slope of a regime channel is in 5800 The average particle size is 0.00323 m…

Q: . A rectangular sedimentation tank following coagulation- flocculation is to treat a flow of 3000 m³…

Q: A treatment plant has a horizontal flow sedimentation basin with a depth of 5 m, width of 7.5m,…

A: Given that: Depth of tank, H = 5m Width of tank, B = 7.5 m…

Q: Given a settling tank operating at 80% TSS removal efficiency, an inflow of 0.5 m3/s, and an…

A: Given, TSS removal efficiency,η = 80% Inflow,Qi = 0.5 m3/s Influent concentration,Xi= 100 mg/L TSS…

Q: Design the following items for an aerated grit chamber for the treatment of municipal wastewater.…

Q: A mechanically cleaned bar rack screen is installed ahead of a velocity controlled grit chamber. The…

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 detention pond is designed to achieve 100% removal of 0.1 mm fine sand particles at the design flow rate. What is its removal rate for 0.2 mm fine sand under the same flow rate? ( _________ )

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

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

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 municipal wastewater treatment plant employs three circular primary clarifiers arranged in parallel, following the bar screen and grit removal chamber. The plant receives 12 MGD. Each clarifier is center-fed (water enters at the center and exists at the perimeter).The clarifier radius is 56 ft and depth is 10 ft.What is the hydraulic loading rate (critical velocity) in each clarifier in units of ft3.ft-2.hr-1 ?
Show calculation on how to determine the average coefficient of permeability of the sand sample at 20°C. Also show calculations on how to determine the discharge the K1 and Average K1
A municipal water treatment plant employs two circular primary clarifiers arranged in parallel, following the bar screen and grit removal chamber. The plant receives 5.0 MGD. Each clarifier is center-fed (water enters at the center and exits at the perimeter). The clarifier radius is 43.0 ft and depth is 10.0 ft. a) What is the hydraulic detention time in each clarifier? b) What is the hydraulic loading rate (critical velocity) in units of ft3/(ft2-hr)?
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
Question # 3 (b): Design a grit chamber for population 80000 with water consumption of 200 LPCD, with maximum flow of 2.5 times of average flow, and horizontal velocity of 2.0m/s and detention time of one minute. Subject: Environmental Engineering
Question: A rectangular primary sedimentation basin is to be designed for an activated sludge treatment plant serving a municipality. The regulatory agency criteria for primary sedimentation basins used for activated sludge system are as follows: peak overflow rate (S) = 80 m3/d-m2, average overflow rate (S) = 40 m3/d-m2, peak solids loading = 50 kg/d-m2, peak weir loading = 372 m3/m-d. The average flow to the basin is 12 000 m3/d. Calculate the tank surface area in m2. Calculate the peak flow rate in m3/d. Calculate the total suspended solids concentration in the incoming flow to the basin (mg/L) Calculate the total weir length (m)
A treatment plant has a horizontal flow sedimentation basin with a depth of 5 m, width of 7.5m, length of 45 m, and process flow rate of 450 m3 /h. What removal percentage should be expected for particles that have settling velocities of 1.0 and 2.5 m/h? What is the minimum size of particles that would be completely removed? Assume the particle density is 2650 kg/m3.The water temperature is 15 oC.
Southside Water Treatment Plant in Tyler, TX Evaluate the primary and secondary sedimentation tanks with respect to key design parameters (detention time, overflow rate, solids loading and weir loading). What level of treatment is present in the facility (pretreatment, primary, secondary, tertiary)? Whaty is the return sludge volume and concentration?
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.
Calculate the settling velocity of the sandy materials present in the wastewater inside the grit removal chamber, if you know that the amount of discharge is 5000 m3/ day, and the specific gravity of the sand particles is 2.0, and their diameter is 0.15 mm, CD= 0.4
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.
A circular secondary clarifier will be used to treat an average daily flow (ADF) of 6,000 m3 /d from a high-purity oxygen activated sludge process with a MLSS concentration of 8,500 mg/L. The RAS flow is 2,500 m3 /d. Key design criteria include an overflow rate of 15 m3 /(d.m2 ) and a solids loading rate of 100 kg/(d.m2 ). Determine the minimum diameter (m) of the clarifier to achieve these criteria.