Find the UC and effective size of the following stock sand and evaluate its efficiency to use in rapid sand filtration. Sand size 0.21 0.30 0.42 084 1.12 1.68 2.38 (mm) 16.5 14.5 8 8.5 Cuuilative wT 12.5 18 () passing 22
Q: Calculate the settling velocity of the sandy materials present in the wastewater inside the grit…
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Q: 2-Calculate the settling velocity of the sandy materials present in the wastewater inside the grit…
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Q: 1. A sand sample of 35 cm² cross sectional area and 20 cm long was tested in a constant head…
A: Given :
Q: For a constant head laboratory permeability test on fine sand, the following values are given:…
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Q: P 4: A sand sample of 35cm2 cross sectional area and 20cm long was tested in a constant head…
A: Cross-sectional Area = 35 cm2 Length = 20cm Head = H = 60cm Discharge = 120mL in 6min or .33cm/sec…
Q: Problem 3-A wet sand sample has a volume of 4.64 x 104 m³ and welghts 8 N. After oven deving the…
A: Given data : Dry weight (WDry)=7.5 NMoist weight (WM)=8 NVolume (V)=4.64×10-4 m3
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Q: 3. Estimate the clean filter headloss for a proposed new sand filter using the sand. Use the…
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Q: A silt particle with a density of 2500 kg/m3 and terminal settling velocity (vs) of 1.9 m/hr is…
A: The given data is shown below:
Q: A bed of uniform sand having particle size 0.66 mm diameter and specific gravity of 2.65, porosity…
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Q: Q-1: Estimate the consolidation settlement due to the lowering of the water table from the location…
A: GIVEN DATA:-⇒γd= 17 KN/m3⇒γsat(sand)= 19 KN/ m3⇒γsat(clay)= 18.6 KN/ m3⇒LL= 40%⇒eo= 0.95
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- 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= 0.4The hydraulic conductivity of a sand at a void ratio of 0.62 is0.03 cm/sec. Estimate its hydraulic conductivity at a void ratioof 0.48.Value of hydraulic conductivity of a sand is 0.010 cm/sec at a porosity of 0.45. Determine the hydraulic conductivity of sand at a porosity of 0.50?
- At 0.45 porosity the hydraulic conductivity of the sand is 0.010 cm/sec. What is the hydraulic conductivity at n = 0.50. a) 0.090 cm/sec b) 0.017 cm/sec c) 0.10 cm/sec d) 0.055 cm/sec make it fastA 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.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.
- The value of hydraulic conductivity of the sand is 0.010 cm/sec for porosity of 0.4. Determine the hydraulic conductivity at porosity of 0.55?Silt-containing wastewater flowing at a rate of 24.2x103 m3/day was fed to a sedimentation tank with dimensions L= 39 m, W= 8m, H=3m The SG of the particles is 2.68. What would be the smallest particle size (in µm) that can be removed from this operation? Assume flow is within Stokes region and that the particles are spherical. The density and viscosity of water is 1000 kg/m3 and 0.001 kg/m-s, respectively.A silt particle with a density of 2500 kg/m3 and terminal settling velocity (vs) of 1.9 m/hr is entering a rectangular sedimentation basin which has a depth (H) of 4 m. The entire flow rate of 21000 m3/day has to flow through the basin. The temperature of operation is 20C and the density of water at this temperature is 998 kg/m3 and the viscosity is 0.001 kg m-1 s-1. Note: Volume of a rectangular basin = L x W x H.1) What is the size of the particle?2) What will be the volume of the rectangular sedimentation basin needed to remove the particle from the water, assuming 100% removal?
- A column analysis of a flocculating suspension is run in the apparatus shown below. Theinitial solids concentration is 320 mg/L. The resulting matrix is shown below. What willbe the overall removal efficiency of a settling basin which is 2.5 m deep with a detentiontime of 2 hr?For a constant head laboratory permeability test on a fine sand, the following are given:Length of specimen = 250 mmDia. of specimen = 62.5 mmHead difference = 450 mmWater collected in 2 min. = 484 cu.mmDetermine the discharge velocity in mm/sec.A pumping test was made in a fine sand extending to a depth of 50 ft where a bed ofclay is encountered .The normal ground water level was at the ground surface.Observation wells were established at distances of 10 ft and 20 ft from the pumping well.A steady state was reached at a rate of pumping equal to 1.2 gpm .The drawdown atthe outer well was 0.5 ft and at the inner well 1.5 ft .What was the hydraulic conductivityof the sand in ft/sec