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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)?
Clausius inequality - thermodynamics: Whenever closed system undergoes cyclic process, cyclic integral is less than zero (that is negative) for an irreversible cyclic process
how to make ? what are the components needed ?
Dear Sir I would to know what is the min. time required for carbon steel tube A214 @ zero C to 50 C
what is dry ness fraction?
Resistance welding electrodes and holders Requisites For Electrodes : The resistance welding electrodes are meant for the following functions: Conducting electricity
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INTRODUCTION: Previously, you studied about the growth of service industry, automobile industry, two-wheeler industry and the growth of Hero Honda Motors Ltd. Now you will study d
a) What is Interference and show the relation for the minimum number of teeth required for a wheel. b) Show the relations for Maximum length of path of contact and Maximum lengt
A tank has two identical orifices in one of its vertical sides. The upper orifice is 3m below the water surface and lower one is 5m below the water surface. If the value of Cv for
Type of Lubrication Systems The complete lubrication of a vehicle can be divided into two systems. (a) Engine lubrication system. (b) Chassis lubrication system.
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