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Consider again the proposed water treatment plant for a city of 100,000 people where the maximum daily water usage rate is 99 X 106 L/d. Determine (a) the number of kilograms of chlorine needed per day and (b) the capacity of the contact tank. You may assume that the chlorine demand is 1.0 mg/L and that the desired chlorine residual is 0.2 mg/L. Furthermore, you may assume that the minimum contact time should be 30 minutes. (The contact time in water treatment plants is usually provided by a large storage chamber called a clear well or storage reservoir. The primary function of the clear well is to isolate the plant from the hourly fluctuation of municipal water demand, but it also serves the purpose of allowing sufficient time so that the concentration of free available chlorine will stabilize at the proper value before being pumped to users.)
Compare the relative contributions of a treated water supply and the collection, treatment and disposal of human wastes towards the control of epidemic diseases in developing countries. If there are insufficient resources for both systems, should one..
Some skin divers go as deep as 50m. What is the gage pressure at this depth in fresh water, and what is the ratio of the absolute pressure at this depth to normal atmospheric pressure? assume T=20 degrees celcius
Find the maximum deflection of a wooden bearer which has three supports; one at each edge (2) and one in the middle (2m from each other). Bearer holds a UDL over its whole length (4m) of 600 N/m.
What superelevation rate would you recommend for a roadway with a design speed of 100 km/hr and a radius of curvature of 500 m? Assume f = 0.11.
Based on volume of a sphere V=4/3(pi)r^3, create a table of volume vs. radius allowing radius to vary from 2.0 to 10.0 cm in 1 cm increments. Graph the data from the table on log-log paper using radius as the independent variable.
At the end of a 0.6-m diameter pipe, the pressure is 270 KN/m2. The pipe is connected to a 0.3-m diameter nozzle. If the flow rate is 1.1 CMS, determine the total force in the connection
What is the concentration of tracer in the reactor 1 h after tracer addition is terminated? The reactor had an initial concentration of tracer of 1.0 mg/L when tracer addition commenced.
Develop algorithms for the explicit solution of the Kinematic Equations when applied to a problem of runoff from a plane surface subject to a steady rate of rainfall excess.
What value of ? minimizes the error of this prediction? In other words, what is your best guess of the student’s total (exam 1+ exam 2) score?
If variable Test(i,j) is selected so the first column represents the student number (1,2,..., 32), 2nd column represents the score of the first homework, 3rd column represents the score of the 2nd homework, etc. If there is a total of 6 homework for ..
why the prediction are less than the observed result of connection in tension experiment?
A closed box with horizontal base 6m x 6m and height of 2m is half-filled with water and is accelerated Ax=4.9 m/sec^2 and Ay=-2.4 m/sec. find the pressure at the forward and rear corners along the bottom.
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