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You plan to use a tank of total volume V= 10 m3 to remove a contaminant at concentration Cin = 1 g/m3 from a waste stream with a flow rate of Q = 1 m3/h. The reaction is first order with a rate constant k1 = 0.5 h-1. Being a good process engineering, you run a tracer study and find that the tank can be represented as a CSTR in contact with a well-mixed but relatively stagnant region. The volume of the stagnant region is Vs = 2 m3 and the exchange flow between the two regions is q= 0.2m3/h.
a. Using symbols, draw the control volumes and develop the transient (unsteady-state) mass balance for both compartments.
b. Assuming steady-state, calculate the effluent concentration from the reactor.
c. Compare (b) to the case where the entire tank is considered to be well mixed. What do you conclude?
To float a 160 pound man using helium balloons (assume 0.52 cubic feet per inflated balloon). How many balloons would it take? Assume density of air is 1.29 kg/cubic meter and the density of helium is 0.179 kg/cubic meter.
What is the risk of constructing a harbor which will be unprotected from wave attack during its construction.
A fluid flowing in a pipe 30cm in diameter has a uniform velocity of 4m/s. The pressure at the center of the pipe is 40KPa, and the elevation of the pipe's centerline above an assumed datum is 4.5m. Compute the total energy per unit weight of the ..
a prismatic bar AB of length L, cross section A, modulus of elasticity E, and weight W hangs vertical under its own weight. if the bar is a riser pipe hanging from a drill rig at sea, what is the total elongation of the pipe
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Explain CBR method of pavement design with one example.
A concentrated downward force of 2000 lb. is located 6' from the left support, and a uniformly distributed load of 200 lbs./lin. ft. begins 6' to the right end of the member. What force must be applied at each connection to maintain equilibrium?
What are the public safety implications of a flaw in a computer chip that is going to used to control a variety of instruments
a beryllium copper wire having diameter of 1-50 mm and length of 40mm is used as a small torsion bar in an instrument. determine what angle of twist would result in the wire when it is stressed to 250 mpa.
a tape is calibrated and found to measure 100.04ft between the 0- and 100-ft marks. what measurements should be laid out to establish a horizontal distance of 682.25ft?
To what maximum angle, measured from vertical, does the rod (with the attached ball of clay) rotate?
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