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An electrodialysis stack is to be used to partially demineralize 100,000gal/day of advanced treated wastewater so that it can be used for reuse by an industry. the membranes are 30 x 30in., and the salt concentration is 4500mg/L. the cations and anions are 0.0742mg/l. the pertinent data are as follows: stack resistance = 4.5 ohms, current efficiency = 90%, ratio of maximum current density to normality = 400 ( with current density as ma/cm2), power cost 2.5cents/kw-hr, brine density = 67lb/ft3, and brine = 12% salt.
determine: number of membranes, the product water and brine flows, gal/day
Select the beam dimensions and reinforcement for a balanced section if the beam sustains a moment as a result of dead load of 60 kip-ft and a moment as a result of live load of 90 kip-ft
Given that that there is no budget to built any type of artificial protection enclosure or retention wall but you still have some allowance for using earthmoving equipment, which of the techniques discussed in class would appropriate in case slope pr..
a paved parking lot section has a uniform slope over a length of 100 m in the flow direction from the point of a
Calculate the X, Y and Z coordinates of point B for radial readings taken to B from occupied station A, if the backsight azimuth at A is 25°32'48", the elevation of A = 610.098 m, and hi = 1.45 m
A hawser is wrapped two full times around a bollard. by exerting an 80 pound force on the free end of the hawser a dockworker can resist a force of 5000 on the other end of the hawser.
Find the magnitude of the velocity and acceleration for the point having the coordinates (3,4). Specify units in terms of L and T.
the outer diameter of this sleeve is 20 mm, and its inner diameter is 10 mm. if the yield stress for the steel is (sy)st = 640 MPa, and for the bronze (sy)br = 520 MPa determine the magnitude of the largest elastic load P
The homogeneous gate shown consists of one quarter of a circular cylinder and is used to maintain a water depth of 4m. That is, when the water depth exceeds 4m, the gate opens slightly and lets the water flow under it.
Find the heat transfer (in KJ/Kmol)from a steady-flow combustor if the products are at 1000 K and (a) complete combustion occurs; (b) 95% of the carbon is converted to CO2 and 5% to CO.
A particle moves along the positive x-axis with an acceleration in meters per second squared which increases linearly with x expressed in millimeters, as shown on the graph for an interval of its motion.
What is the mathematical expression for Centripetal Acceleration? Please describe the terms in your expression and give a brief summary of what Centripetal acceleration is.
Given that an aircraft flying at FL350 encounters a tailwindof 35 knots and the instrument in the cockpit shows anindicated airspeed of 310 knots. What is the standard atmosphere atthis altitude?
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