Three parallel flow sedimentation/flocculation basins are to be used to treat a flow rate of 5 MGD. What is he design volume, in cubic feet, of one of these tanks if the desired detention time is 45 minutes? If the ength of a tank is 80ft and the width is 18ft, what is the water velocity in ft/min? What would be the
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- 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 rectangular sedimentation tank has dimensional proportions of 10:1:3 (L:W:H). If sedimentation is done in batch, the tank can cater 1080 m^3 in one hour, while the detention time for a continuous settling is 15 minutes on the same tank. a) During batch sedimentation, how many batches is done in an hour? b) Solve the dimensions of the tank. c) If the critical settling velocity is 0.003m/s, how many percent of the solids will be settled down? d) If the influent has a solids concentration of 230 mg/L and the effluent is 90% of the influent, compute the solids concentrations both at the underflow and the overflow. e) Determine the filter area if the filter loading rate is 2.3 gal/d.ft. ANSWER D AND E I PROVIDED SOME INFORMATION THANK YOU!A rectangular sedimentation tank has dimensional proportions of 10:1:3 (L:W:H). If sedimentation is done in batch, the tank can cater 1080 m^3 in one hour, while the detention time for a continuous settling is 15 minutes on the same tank. a) During batch sedimentation, how many batches is done in an hour? b) Solve the dimensions of the tank. c) If the critical settling velocity is 0.003m/s, how many percent of the solids will be settled down? d) If the influent has a solids concentration of 230 mg/L and the effluent is 90% of the influent, compute the solids concentrations both at the underflow and the overflow. e) Determine the filter area if the filter loading rate is 2.3 gal/d.ft.
- 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 with a length twice the width and 3 m deep, receives a flow of 2400 m/day with a normal concentration of suspended solids of 120 mg/l Determine: 1. The surface over flow rate (SOR) when the detention time is 6 hours. 2 The water entering velocity to the basin (cm/min) 3. The efficiency of the basin when the total mass of sludge produced per day is 216 kg.Design a circular sedimentation tank to treat 2500 m3 of raw water per day. The retention period assumed to be 2.8 hours. The process is coagulated sedimentation, assume the flow depth=2.8 m.
- 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?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.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. a) Calculate the tank surface area in m2. b) Calculate the peak flow rate in m3/d. c) Calculate the total suspended solids concentration in the incoming flow to the basin (mg/L) d) Calculate the total weir length (m)
- Sedimentation is the process of allowing particles in suspension in water to settle out of the suspension under the effect of gravity. A water treatment plant has four clarifiers treating 1.5 MGD of water. Each clarifier is 4.88 m wide, 24.4 m long, and 4.57 m deep. Determine the following: (i) The detention time (ii) The overflow rate marks (iii) The horizontal velocity (iv) The weir loading rate assuming the weir length is 2.5 times the basin width.pesign a rectangular sedimentation tank to treat 120000 m3/day flows. ssume the SOR=30 m/day, L= 32 m, LW-4:1. D.T-3hr?The town of Parit Raja has an existing horizontal-flow sedimentation tank with an overflow rate of 18.5 m3 /d.m2 . It is required to remove particles that have settling velocities of 0.15 mm/s, 0.18 mm/s, and 0.5 mm/s. Determine the percentage of removal that should be expected for each particle in an ideal sedimentation tank.