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A pickle producing plant produces and discharges a waste brine solution with a salinity of 13,000 mg/L NaCl at a rate of 0.14 MGD into a stream. Before the discharge enters the stream, the flow rate of the stream is 1.2 MGD and the salinity is 20 mg/L. Assume that you can model this as a CSTR.
a. what is the concentration of the mixture of the stream and the discharge directly below the discharge point ( answer: 1376 ppm)
b. Directly below the discharge point is a prime fishing spot and the fish are intolerant to salt concentrations above 200 mg/L. how much salt should be removed per day from the plant effluent stream in order to maintain a concentration of salt < 200 mg/L in the stream mixture?
Determine the value of Po, as a funciton of H, for these two investment alternatives to be equivalent at an interest rate of i=15% per year.
The 3.5mg engine is suspended from a 500 kg spreader beam and hoisted by a crane which gives it an acceleration of 4m/s^2 when it has a velocity of 2m/s. determine the force in chains AC and AD during the lift.
A tub of a washing machine is rotating at 50 rad/s when the power is turned off. If it takes 15s for the tub to come to rest, determine (a) the constant angular deceleration, and (b) the total number of revolutions the tub makes.
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what is the probability that less than 0.5 inches of precipitation will occur in any January? What is the probability that more than 2.5 inches wil
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Two hemispheric shells are perfectly sealed together, and the internal pressure is reduced to 43 % of atmospheric pressure. The inner radius is 10.5 cm, and the outer radius is 10.75 cm. The seal is located halfway between the inner and outer radi..
The air density is 0.00206 slugs/cuft. The car has frontal area of 19.8 sqft, a drag coefficient of 0.28, a wheel radius of 12.6 inches, a drive axle slippage of 3%, and a drivetrain efficiency of 88%.
Analyze the frame by moment distribution. Determine all reactions and draw the shear and moment diagrams, locating points of inflection and labeling max and min shear and moment values.
An eighteen inch diameter sandstone column is subjected to an axial compressive force of 2x10^6 lb / ft. Find the factor of safety based on the ultimate compressive force. For the ultimate compressive stress of sandstone=85Mpa.
The local engineer concludes that, since the oil must have been destroyed by the soil microorganisms at a rate of 20 mg/kg each year, in one more year the site will be free of all contamination. a. Is this a good assumption
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