efficiency of flocculant settling if tank depth is 3 m
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- 3/7/2021 Water Treatment I-Third class Second semester Q1) The data in the table below used to design a sedimentation tank with depth=4m and detention time= 2hr, the influent flow is 2000L for each minute. 0.01 Settling Velocity(cm/sec) Weight fraction Greater 0.004 0.02 0.03 0.04 0.05 0.063 0.085 0.12 98 95 8 6 4 3 1 0.5 than size % Determine the overall removal efficiency for this tank, s.g. of particle=1.2 , u=0.89x10-³N.s/m². Use Ax=0.1.Q2. A ring infiltrometer (inside area is 962 cm²) test was made on a soil with the results shown in the table below. Elapsed 10 20 30 60 90 150 time (Min) Wat.Vol 300 650 1190 1950 2500 3350 3900 4600 added since start c cubk cenembcr Determine the Horton's Infiltration equation.Q1 Find the efficiency of flocculant settling tank if tank depth is 3 m and surface loading rate is of 4 m³/m²//hour given the following data Time, Removal percent at depth: 1.5m min. 0.5m 1 m 2 m 2.5 m 20 61 30 71 58 40 81 68 63 56 57 50 90 69 67 63 60 87 80 68 70 86 80 75
- A drainage pipe became completely blocked during/ a storm by a plug of sand, 1.5 m long, followed by another plug of a mixture of clays, silts and sands, 0.5m long, as shown in the attached figure. When the storm was over, the water level above ground was 1 m. The coefficient of permeability of the sand is 2x that of the mixture of clays, silts and sands. a. Calculate the pore water pressure at the center of the sand plug in kPaA drainage pipe became completely blocked during/ a storm by a plug of sand, 1.5 m long, followed by another plug of a mixture of clays, silts and sands, 0.5m long, as shown in the attached figure. When the storm was over, the water level above ground was 1 m. The coefficient of permeability of the sand is 2x that of the mixture of clays, silts and sands. a. Calculate the pore water pressure at the center of the sand plug in kPa.Calculate the pore water pressure at the center of the mixture of clays, silts and sands in kPa. Find the average hydraulic conductivity in the sand. Find the average hydraulic conductivity in the mixture of clays, silts and sandsQuestion 5 A well pumping at 2180.4 m³/d has observation wells located 3, 12, 46, 91, and 122m away. After 0.14 day of pumping, the following drawdowns were observed: Distance (m) Drawdown (m) 4.60 3 12 2.87 46 1.34 91 0.52 122 0.08 data on semi-log scaie usiny ivATLAD, Determine transmissivity (T) in m?/d, hydraulic conductivity (K) storage coefficient (S) m/d, and the
- )A U-tube containing mercury (relative density 13.6) has its right-hand limb open to at mosphere and the left-hand limb connected to a pipe conveying water under pressur e, the difference in levels of mercury in the two limbs being 50 mm. If the mercury leve Tin the left limb is 100 mm below the centre line of the pipe, find the absolute pressur e in the pipeline in kPa. Also find the new difference in levels of the mercury in the U-t ube, if the pressure in the pipe falls by 0.5 kN/m2.MOITAKIMAKS MUTTGIM 1.) DETERMINE THE COEFFICIENT OF PERMEABILITY FROM THE FOLLOWING DATA (MM/S) LENGHT OF SAMPLE = 25cm ile browsit enitubon Monastale AREA OF CROSS SECTION OF THE SAMPLE = 30 cm² HEAD OF WATER = 40ст to rutemi DISCHARGE = 2.00 mL IN 110 seconds yan! apth inbom utne nit veroo atuato ed basebal 15 olsadneni give in to lua ant of oub nensum step mA'S a pronic, uns gesig te brsA DrahmedsoilMechanicsnoteschapter5.pdf EMENT%20LURI/Downloads/DrahmedsoilMechanicsnoteschapter5.pdf of 62 Q 3.50 m 5.27 The dam shown in Figure is located on the anisotropic soil. The coefficients of permeability in the x and z directions are 5*107 and 1.8*10 m/s, respectively. Determine the quantity of seepage under the dam. Ans.: Nr = 3.25, Na = 12, q = 1.1 10 m/sec/m 15.00 m 1.00 m 3.00 m 8.00 m 33.00 m 8.00 m Soil Mechanics (177) Civil Eng. Dept, - College of Eng Assistant Prof. Dr. Ahmed Al-Obaidi 12:05 AM 4/12/2021 144 8. U. H. J. MI
- 1. Percent passing on sieve 600um Weight Individual Cumulative Percent Sieve Retained Percent Percent Passing (g) 4.75mm 31.5 2.36mm 67.6 1.18mm 96.5 600um 111.1 300um 60.5 150um 115.6 75um 17.5 pan 31.52. An oil having a specific gravity of 0.80 has a kinematic viscosity of 2x10$ m²/s flows in a 100mm diameter pipe at a rate of 0.001m³/s. a. Compute the Reynolds number b. Determine the equivalent absolute viscosity c. Determine the centerline velocity2. Please design a Type II settling tank that receives a 1000 m3/day of a waste stream, after flocculation, that displays the following settling behavior. The initial concentration for this test is 500 mg/L. Time (min) 5 10 20 30 40 50 60 75 1 meters 481 418 331 270 225 193 154 133 2 meters 490 456 425 361 325 279 240 198 3 meters 495 483 463 413 369 333 290 259 Concentrations are in mg/L If the required removal rate is 50%, how large should the tank be?