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SBR Example: A POTW treats 4 MGD. The SBR is 0.25 MG. How many tanks do you need? Assume that the tank already has 25% of Its volume in sludge and that the fill time is 3 hours, the react time is 2 hours (the total aeration time is 4 hours), the settle time is 0.5 hours and the decant time is 0.5 hours. (note in class we did not assume the 25% was already full.)
Explain what happens to the following quantities when a Rankine cycle is modified to include a reheat
A horizontal curve was designed for a four-lane highway for adequate SSD. Lane widths are 12 feet, and the superelevation is 0.06 and was set assuming maximum fx. If the necessary sight distance required 52 feet of lateral clearance from the roadw..
The fluid pressure in the screen of a piezometer in a saline aquifer is 7.688 x 10^5 N/m^2. The fluid density is 1055 kg/m^3 and the temperature is 14 degrees C. The elevation of the piezometer screen is 45.9 m above sea level.
If a concrete beam with a f'c=4000psi experiences a drop in temperature of 30 Degrees F, What is the internal tensile stress. Will the concrete crack. What could i do to prevent cracking.
Calculate the support reactions in the beam and calculate the sheare force and binding moment - draw the binding moment and shear force digram.
A gravity thickener receives 33.000 Lpd of wastewater sludge and increases the solids content from 3.0% to 7.0% with 90% solids recovery. Calculate the volume of thickened sludge.
The size of the house is 28ftx40ftx10ft. For simplicity, assume the roof is flat, covered with 1-in plywood plus asbestos shingles and has 3 1/2 in of fiberglass insulation. There is a wood subfloor (25/32 in) in the attic and a ahrdwood floor (3/..
Design an algorithm that lists all possible rearrangements of the symbols in a string of five distinct characters. (in pseudocode)
Ball A is thrown vertically upward from the top of a 20-{\rm m}-high-building with an initial velocity of 3m/s . At the same instant another ball B is thrown upward from the ground with an initial velocity of 16m/s .
Hydrographic survey deals with the study of An ideal vertical curve to join two gradients is called?
If you deposit $1000 per month into an investment account that pays interest at a rate of 6% per year, compounded quarterly, how much will be in the account at the end of 5 years? There is no interperiod compounding.
Using method of joints, calculate the forces in members EC and EF. Note that the length of the member CD is 3.464 m, the length of member EC is 2m, and angle CDE is 30 degree ( this will cut down a bit of trigonometry effort).
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