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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)?
tension
I want to tranfer the rotatory motion of my apache RTR 160 back wheel to a motor(of dynamo). kindly guide me with the design. i''m struck up in the gear wheel mechanism.
Figure aside shows a belt conveyors which consists of endless belt. It has a power driven pulley at one end which moves the belt or downward flow of materials. General
(a) List out the advantages of air refrigeration system besides of vapour refrigeration system . (b) A vapour Compression refrigerator uses R-40 and acts between temperature - 1
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design guideways
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Value engineering & Value analysis VA may be defined as looking at an existing product or a product already in production to see if changes in design or process can reduce prod
Classification of system of forces
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