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A biodegradable wastewater is to be treated in a CMFR. The BOD5 reaction(removal) rate coefficient is 0.15/day. The CMFT has a 4000 gallon volume. What wastewater flowrate can be treated in this CMFR in order to remove 98% of the BOD5? What Volume of CMFR would be required to remove 92% of the BOD5 at the calculated flowrate?
using the stress transformation quations only,given a stress state where sigma x=6500 psi,sigma y= 17,300 psi and tau xy=2900 psi, determine the principal stresses,the principal angle and the maximum shear stress.
A firm's stockholders expect a 15% rate of return, and there is a $12M in common stock and retained earnings. The firm has $5M in loans at an average rate of 7%. The firm has raised $8M by selling bonds at an average rate of 6%
A circular plate is loaded with a total load of 60 kips distributed uniformly over the surface at a pressure of 100 psi. Calculate the vertical stress at every combination of the following: (a) Depth: 12 and 50 (b) Radial distance from the center ..
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.
explain in your words the procedure of the Gauss-Newton method used to control some parameter (z) to meet some expected performance (y) using controllable parameters (A,B)
What is the maximum column load in kips that could be placed on a 4-ft square temporary footing on a sand for which the standard resistance is about N=15 and the water table is at the surface? A factor of safety of 2 is to be maintained against be..
A 1600 ft long sag verical curve (equal tangent) has a pvc at station 1200+00 and elevation o 1500 ft. the initial grade is -3.5% and the final grade is 6.5%. determine the elevation and stationing of the low point, pvi and pvt.
water flows from a lake into a steep natural channel. the water surface elevation of the lake is 97.0 with respect to the datum. the channel properties are given below. determine the flow rate in the channel
A concrete mix with a 3 inch slump, w/c ratio of 0.50, and sand with a fineness modulus of 2.4 contains 1.700 lb/yd^3 of coarse aggregate. Compute the required weight of coarse aggregate per cubic yard.
An 18in. diameter sewer is placed on a grade of 1.5ft/1000ft. What are the discharge and the flow veloctiy when the pipe is full
using darcy's law compute the quantity of flow, seepage velocity and contaminant loading of the river. ground water is flowing through unconfined uniform 3m thick sand aquifer and discharging to river.
A hospital waste containing 0.7µCi/L of 32P is to be disposed of. How long must the radioisotope be held to meet the allowable discharge activity
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