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A hypothetical water treatment train consisting of coagulation/flocculation unit, filtration unit and chlorination system is used to treat surface water characterized by bacterial concentration of 800,000 CFU/L. If the log removal for each system is given below, what is the final concentration of CFU/L after the water goes through the treatment train?
Treatment Train Unit Log Removal for the unit
Coagulation/Flocculation 2.1
Filtration 1.3
Chlorination 2.5
A pump is to be used to draw seawater from the bay at an elevation of 0 to a reservoir at a desalination plant that has a water surface elevation of 255 feet. A 12-inch diameter DIP pipe (CHW = 120) which is 625 feet long connects the two bodies ..
a 6 inch soil cement base and an 8 inch crushed stone subbase, which truck will cause more pavement damage?(assume drainage coefficients are 1.0)
A discharge of 2,200 ft^3/sec flows in a trapezoidal channel at a normal depth of 8.0 ft. The channel has a slope of 0.01, a 12-ft bottom width, and side slopes of 1:1 (H:V). Determine the manning coefficient of channel roughness
a mass of 2kilogram is projected with a speed of 3m/s.if a plane inclined 20 degrees with the horizontal.after travelling travelling 0.8meters, the mass comes to rest. determine the coefficient of friction and also the speed as the black returns t..
a circular steel tube of length L=1.2m is loaded in torsion. If the inner radius of the tube is 45 mm and the measured angle of twist between the ends is 0.4 degrees, what is the shear strain at the inner surface
The velocity distribution for water (20 C) near a wall is given by u=a(y/b)^1/6 where a=10m/s, b=2mm, and y is the distance from the wall in mm. Determine the shear stress in the water at y=1mm. [viscosity of water at 20 C = 1.81 x 10^-5]
a tension member with cross-sectional area 3 in2 resists a load of 10 kips. How do you Calculate the normal and shear stress on planes making a 0, 20, 45, and 60 angle with the transverse section.
the weigt w causes atension of 100 lb ic cable cd. if d=2ft, what is the moment about the z axis due to the force eserted by he cable cd at point c.
As an agronomist you have been approached by a large pepper farmer who wishes to determine an appropriate"yield goal" fot this season. He provides you with yield data for ten year period which indicates that his production has been slowly decreasi..
calculate departures and latitudes, misclosures in departures and latitude, and traverse relative precision. Balance the departures and latitude using the compass rule, and calculate coordinates of points B, C, and D.
Compare the stoichiometric air/fule ratios (AFR) for complete combustion of Benzene (C6 H6), Octane (C8 H8), and Ethanol (C2 H5 OH) in air (O2 + 3.76 N2). The only products should be CO2, H2O and N2.
shaped nozzle such that the velocity along the center line of the flow increased from 1.5 m / s to 15 m / s at a distance of 37.5 m. specify the amount of convective acceleration at the beginning and end of the range.
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