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A well water with a total hardness of 10.76 ppm is to be used for a pharmaceutical industry, which requires finished water hardness to be 3 ppm. An ion exchange resin is selected requiring 0.3 pounds of salt per kilo-grain of hardness removed to regenerate. What is the salt usage for each regeneration if the system regenerated every 10 days? What size resin tanks (diameter, height) would be required for a duplex system with no redundancy?
Assumptions:
Limit water loading rate to 8 gpm/sf
Resin capacity is 20,000 grains per cubic foot of resin
Grains per gallon: 17.1 = 1 mg/L
Water production is 1.0 mgd
Resin void is 50%
The section of the plywood in the 3rd quadrant is sawed off and the resulting piece is then glued squarely over the 4th quadrant portion of the plywood with glue of negligible weight.What are the x- and y-coordinates of the resulting center of gra..
A dense sand has an effective friction angle of 43 and c'=0. A dry, 2.8-inch diameter sample is tested in drained triaxial shear with a confining pressure of 2500 psf. What axial load, P (in pounds), will be required to fail the sample?
Calculate average figures for tonnes/round and powder factors in kg/tonne and Determine the drill metres required to achieve a production rate from grade control blasting.
The brush is immersed in the first volume and agitated until equilibrium is established, removed and the exercise is repeated with the second volume. Assume that the solvent remaining in the brush after it is removed from the first batch is insign..
Devise a appropriate management system that you as a commercial manager for the contractor would recommend to the project team for use on a construction or building contract.
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Critical review the decision making of a failed major construction/property project within the UK in the last ten years.
In the construction management, there is a lot of procurement route that are necessary and suitable for the construction industry.
Discuss the different agencies, institutes, centers, different environmental companies that are active in UAE.
The horizontal motion of plunger and shaft is arrested by resistance of the attached disk which moves through the oil bath. If the velocity of plunger is v.
Three days later, Abu sees his solicitors and executed the transfer of his said bungalow to Abdul Samad at the said value. Two month later, Abdul Samad expelled Abu from the religious group. Abu now wants to set aside the sale of his bungalow.
For the data given below, derive the 2-hr unit hydrograph for a watershed having a drainagearea of 216 km^2, assuming a constant baseflow of 20 m^3/s.
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