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Determine the surface area of a primary settling tank sized to be handle a maximum hourly flow of 0.570 m3/s at an overflow rate of 60 m/day.If the effective tank depth is 3.0 m,what is the effective theoretical detention time?
Two new rides are being compared by a local amusement park in terms of their annual operating costs. The two rides are assumed to be able to generate the same level of revenue (and thus the focus on costs).
A thermal reservoir (T=308K) is brought in contact with the tank, transferring enough heat to the tank to raise the pressure inside to 4 bar. Calculate the entropy changes of the refrigerant and the thermal reservoir
5,000 gpd of primary sludge at 5% solids (50,000 mg/l) and 5,000 gpd of biological treatment sludge (10,000 mg/l) are blended, then thickened to 8% solids. What volume of supernatant is returned to the reactor
Determine the minimum distance from the diversion that a road sign should be located informing drivers of the temporary change on the highway. The letter height on the road sign is 5 inches.
What percentage removal should be expected for each of the following particle settling velocities in an ideal sedimentation tank: 0.1 mm/s, 0.2 mm/s, 1 mm/s.
It the mean annual runoff of a drainage basin of 10000 km^2 is 140 m^3/s, and the average annual precipitation is 105 cm, estimate the ET losses for the area in 1 year. What are your assumptions
A minimum contact time of 30 min is required to reduce the pathogen concentration from 100 pathogens/L to below 1 pathogen/L through a first-order decay process. You plan on treating water at a rate of 1,000 gal/min.
Water is pumped at a rate of 1.57 cfs from one large open tank into another through a 6 in diameter cast iron pipe 400 ft long. The water level in the second tank is 160 ft above the level of the first tank and the discharge end of the pipe is sub..
Determine the deflection of the right end of the pointer and the maximum deflection of the beam.
Determine the height, h, the water level will rise in the tank before remaining constant. Also, if initially the tank is empty, what amount of time will it take for the water level to rise to h? Be sure to justify all assumptions made.
Water, initially dry saturated vapour at 4 bar, lls a closed rigid con- tainer. The water is heated until its temperature is 400C. Determine the work done and the heat transfer.
Cities cover approximately 0.5% of the Earth's land area, which itself constitutes 29% of the total surface of the planet. What is the probability that the second explosion in part (b) occurs over a city? Assume an equally likely probability of im..
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