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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)?
1.0 INTRODUCTION Welding is a material joining process used in making welds and a weld is a localised coalescence of metals or non metals produced either by heating the mate
When you arrive at Duke's Dude Ranch, you are greeted by the large wooden sign shown. The left end of the sign is held in place by a bolt and the right end is tied to a rope that
Wave Retarders in Tandem Write the Jones matrices for the following retarders: (a) A π/2 wave retarder with the fast axis along the x direction. (b) A π wave retarder with
relative motion measuring instrument
BASIC PHYSICS
SHIELDED METAL ARC WELDING (SMAW) It also known as Manual Metal Arc Welding (MMAW). The heat required for welding is generated by the electric arc formed between metallic elect
For the beam shown in Figure compute the deflection at the element nodes. The modulus of elasticity is psi and the cross section is as shown in the figure. Also compute the maximum
what is the two purposes of surveying
I am trying to find out how a hunting scope is manufactured with proper steps and what machines are used to make a scope?
for a 210 MW unit how we calculate power output at each stage if the turbine has 25 reaction stages
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