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New primary settling tanks must be designed for a wastewater treatment facility that has an average design flow rate of 0.20 m3/s and a peak hourly design flow of 0.60 m3/s. The influent contains 200 mg/L of BOD5 and 250 mg/L of TSS. Three primary clarifiers operating in parallel is the layout chosen. If the clarifiers have an efficiency of 60% for removing influent total suspended solids and if the solids underflow (TSS removed) has a concentration of 3.0% (by weight) of TSS, what is the daily volume of primary solids produced (m3/d)?
A backsight reading of 2.56 was obtained with rod at A and a foresight reading of 7.45 was obtained with the rod at the trial point B. If B is located 37.00 feet from the center line of a planned 50-foot wide road, is the catch point located uphi..
A lake has a volume of 750,000 m3 (dimensions 15 m deep, 100 m wide, and 500 m long) and behaves as two completly mixed cells. Cell 1 makes up 40% of the lake ( dimensions 15 m deep, 100 m wide, and 200 m long) cell 2 makes up 60% of the lake (dimens..
How many hours should it take an articulated wheel loader equipped with a 4 yd bucket to load 3000 cu yd of gravel from a stockpike into rail cars if the average haul distance is 300 ft one way
Water is flowing from a higher to a lower reservoir through a 24-inch pipe that has a Darcy friction factor of 0.02. The local loss coefficients for the bends, entrances, and exits sum to 3.5.
An adiabatic argon unit compresses argon at 200 kPa and 27C to 2.18 MPa. If the Argon leaves this compressor at 513C. What is the isentropic efficiency of the compressor
A fireman is standing on a hoist and sprays water at a fire. the fire is 35 ft in the x direction and 20ft downward in the y direction. the water flows at 65 ft/s. determine two possible angles theta at which this can be done. assume the angle below ..
The sports car has a mass of 2.3 Mg and accelerates. at 6m=s2, starting from rest. If the drag resistance on the car. due to the wind is F D = (10v) N, where v is the velocity in m/s,
A soil specimen is 38 mm in diameter and 76 mm long and in its natural condition weighs 168.0 g. When dried completely in an oven the specimen weighs 130.5 g. The value of Gs is 2.73.
Assume the settling tank behaves like an ideal sedimentation tank, what percentage of removal should be expected for particles with a settling velocity of 0.002 m/sec
Assuming an average head loss of 15% in the pipeline, and 80% conversion efficiency for the turbine/generator, how many gallons of water need to flow from the upper tank to the pond to supply the daily energy requirement for the cabin?
A fluid in an aquifer is 23.6m above a reference datum; the fluid pressure is 4390 N/m2. The fluid density is 0.999E3 kg/m3. What is the total energy per unit mass What is the total energy per unit weight
Two factories are manufacturing and supplying a single type of good to four warehouses. The factories can produce a1, and a2 units of the good each month, and the warehouses need b1, b2, b3, and b4 units each month
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