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A water treatment plant treats a continuous flow rate of 50,000 m^3/day and plans to build a 10,000 m^3 tank to house an additional treatment process. The reaction occurring in the tank will remove nitrate according to first order decay with a rate of 0.25 per hour (12 hrs/day). The influent concentration of nitrate is 50 g/m^3.a) What will be the residence time of the tank?b) What will be the steady-state effluent concentration of an ideal CSTR?c) What will be the steady-state effluent concentration of two equally-sized (5,000 m^3 each), ideal CSTR's in series?d) What will be the steady-state effluent concentration for an ideal PFR? Assume dimensions of length = 500m, cross sectional area of flow = 20 m^3
A powerplant is burning coal on a cold, clear winter morning at 8am with a wind speed of 2.6m/s measure at 30m and an inversion layer with its base height of 697m. The effective stack height is 30m.
How to determine maximum positive and maximum negative factored design moments at a certain point
If the aircraft flies at 9000 m standard altitude, make a plot of drag (in N) versus speed (from stall to 240 m/s) and determine the optimum emise velocity (minimum drag per unit speed).
A consolidated-drained triaxial test on a normally consolidated clay yielded a friction angle of 28°. If the all-round confining pressure during the test was 140 kN/m2, what was the major principal stress at failure.
Water flows through the pipe contraction shown. for the given 0.2 m difference in the meter level, determine the flowrate as a function of the diameter of the small pipe, D.
A particle is traveling along a circular curve having a radius of 13 m. If it has an initial speed of 21m/s and then begins to decrease its speed at the rate of at = (-0.25s)m/s2
Write a script newquot.m that uses the Newton quotient, [f (x + h) - f (x)]/h, to estimate the first derivative of f (x) = x3 at x = 1, using successively smaller values of h: 1, 10-1, 10-2, and so forth. Use a function M-file for f (x).
If the detention storage on the paved section is increasing at the rate of 60 m3/hr, what is the runoff rate into the inlet grate?
Given the data , design a section of sanitary sewer to carry these flows at minimum velocity of 2.5 fps. Assume that the minimum depth of the sewer below the street must be 8.5 ft and that an n value of 0.013 is applicable.
Write a MATLAB code that calculates the weight (forces due to gravity) in lbf on each planet of our solar system and earth's moon for probes/rovers which have a mass between 100 lbm and 300 lbm. Use increments of 20 lbm.
The magnetic north azimuth of a line is 128 degrees 27' while the magnetic declination is 3 degrees 30'E. What is the astronomic azimuth of the line (in decimal degrees)?
The average P concentration in the runoff if the overall (agricultural and residential areas) runoff coefficient = 0.4, 40% of P is removed from the agricultural area by rainfall, and 90% of P is removed from the residential area by rainfall.
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