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2. Assume that the river has been selected as the source of raw water for the 2.0mgd demand.
a. Surface water has low alkalinity, high turbidity. The distribution system is cast iron pipe. What's the concern with using alum (Al2(SO4)3) as the coagulant. What other chemical could be used?
b. A slow sand filter will follow the coagulation-flocculation-sedimentation. The organic content in the raw water supports a biofilm on the filter surface. How might this reduce the disinfectant dosage? What text Figure shows this?
c. The 4' thick filters run q=500 gpd/ft2. Find the total area of filter surface required to treat the 2.0 mgd. Also compute the hydraulic residence time in the filter.
d. The filtered water still has traces of ammonia and dissolved organics. Calcium hypochlorite Ca(OCl)2 is used for disinfection. What's the advantage, what's the potential problem with using the hypochlorite rather than using ultraviolet (UV)?
This lab sheet is designed to guide students through the experimentation they will need to conduct in order to complete the continual assessment element of their NG3H235 studies.Th
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expression for elongation of bar of conical section under the action of axial force p whenit tapers from d1 to d2 over a length
After trial if oil seal found still leaking: Dismantle engine and check crank shaft for run out which should not be more than 0.10 mm.
Define the nature of shear force and bending moment under load variation. Sol.: The nature of SF and BM variation under two-load region is given in the table below
steam coming out of the whistle of a pressure cooker is ?
Transverse Electric Field Consider a charged particle (e.g. an electron) moving along X-axis with constant velocity v , i . At x = 0 , it enters into a region where a unif
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Determine the work done per minute by a punch tool making 20 working strokes min when a 30 mm diameter hole is punched in 5 mm thick plate with ultimate shear strength of 450 MPa i
consider the following LPP max z=9x1+8x2+5x3 subject to 2x1+3x2+x3 5x1+4x2+3x3 x1,x2,x3>_0 (a)solve using simlex method (b)hence using the sesitivity analysis,find the new optima
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