A water treatment plant is processing water at a flow rate of 1.5 m/s using three parallel treatm...
The flocculation process in one treatment train at a surface water treatment plant is to be designed to treat a flow rate of 12 ML/d with a hydraulic detention time of 30 minutes. The flocculation basin should be divided into 4 equally sized stages with successively lower velocity gradients in each stage (that is, tapered flocculation). The velocity gradients in stages 1, 2, 3, and 4 should be 80, 65, 50, and 35 s−1, respectively. The water temperature is 15°C....
Please help with this environmental engineering problem A new water treatment facility will be built to supply water to the town of Freemont. The town's population is currently 14,000 and the per capita water use is 100 gal per day. The new facility will be designed to account for increases in both per capita water use and population growth, and projections for water use will be determined for fifty years in the future. The population of the town of Freemont...
A drinking water treatment plant is designed with three sedimentation basins in parallel. Each basin is designed with an overflow rate of 1,200 gpd/ft2 (gallons per day per square foot). (“In parallel” means that the flow is split evenly between the basins as shown below.) A. If the plant flow is 20 mgd (million gallons per day), find the plan area of each basin in square feet. B. Calculate the dimensions of the basins (length and width in feet) if...
ENV Water Supply Flocculation tanks need to be sized to match three sedimentation basins 3.5 m deep and 6.0 m wide. The sedimentation basins each handle a flow of 5000 m/d, as will the flocculation tanks. The floc tanks will have two mixing sections with an overall average velocity gradient (G) of 35/s. The average velocity gradient-time (Gt) value has been set at 80,000. The paddles will be the wooden paddle-wheel type and will turn on a horizontal axis perpendicular...
If the settling velocity of a particle is 0.30 cm/s and the overflow rate of a horizontal flow clarifier is 0.25 cm/s. 4. a. What percent of the particles are retained in the clarifier? b. If the flow rate is doubled, what percent removal of particles would be expected:? c. If a 1.0-m'/s flow water treatment plant uses 10 sedimentation basins with an overflow rate of 15 mld m2. what should be the surface area (m2) of each tank?
Ex. 4 A water treatment plant with a maximum daily flow of 3 m/s (1.5 times the average flow) is treating a surface water. The water is coagulated with alum and the alum floc was measured to have a settling velocity of 2.2 m/h at 10 °C. Design a horizontal-flow rectangular sedimentation system based on the maximum day flowrate. Include the number of basins, dimensions and criteria checks.
1. The design flow for a water treatment plant (WTP) is 1 MGD (3.8x103 m'/d). The rapid mixing tank will have a mechanical mixer and the average alum dosage will be 30 mg/L theoretical mean hydraulic detention time of the tank will be 1 minute. Determine the following: a) the quantity of alum needed on a daily basis in kg/d, b) the dimensions of the tank in meters for a tank with equal length, width, and dept c) the power...
4. (20 pts) A rapid mixing basin is designed to process 3.0 MGD of water. The basins will be square, and the depth is assumed to be 1.times of the width. Use a detention time of 30 s and velocity gradient of 750 s'. Two basins will be constructed each having a capacity to process exactly half the entire water flow. Determine: (a) Dimensions of the basin (L, W and H) (b) Power input (hp) (c) Rotational speed (rpm) of...
primary clarifier is to be designed for a municipal wastewater treatment plant with a flow of 4160 m/d and peak flow during the day of 3.10 times the average hourly flow. Pertinent data are: peak overflow rate 73.3 m/d.-m2, maximum peak weir loading 373 m3/d-m, and minimum tank depth 2.13 m. Determine: A. The clarifier diameter B. The side water deptlh C. The peak weir loading. Is it acceptable? D. The percent suspended solids removal on the basis of the...
1. A cross- flow, horizontal shaft, paddle-wheel flocculation basin is to be designed for a flow of 20.000 m ld a mean velocity gradient of 33.33 s (at 10 C), and a detention time of 45 min. The GT value should be from 50,000 to 100,000. Tapered flocculation is to be provided, and three compartments of equal depth in series are to be used, as shown in Figure 1. The G values determined from laboratory tests for the three compartments...