Coagulation-flocculation-sedimentation, Mechanical Engineering

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)?

Posted Date: 3/2/2013 6:20:52 AM | Location : United States







Related Discussions:- Coagulation-flocculation-sedimentation, Assignment Help, Ask Question on Coagulation-flocculation-sedimentation, Get Answer, Expert's Help, Coagulation-flocculation-sedimentation Discussions

Write discussion on Coagulation-flocculation-sedimentation
Your posts are moderated
Related Questions
Briefly Explain transient response for various input signals - unit step input - unit parabolic function - unit ramp function - impulse function

Performance criterion of a steam power plant: Sol. :   The design of power plant can be determined largely by the consideration of capital cost and operating cost; the forme

Determine change in length of the bar: A steel bar is subjected to loads as shown the given figure. Determine change in length of the bar ABCD of 18 cm diameter. E = 180

Difference between path function and point function

Q. What do you mean by Filler metals? Use filler metal that is similar in chemistry, corrosion resistance, and mechanical properties of the base metal being welded. Filler m


A triangle ABC with vertices A (30,20), B(90,20), C(30,80) is to be scaled by a factor of 0.5 about a point X(50,40). Calculate :- (i) The composite transformation matrix; and


Explain Side Cutting Edge Angle It is angle between the side cutting edge and the longitudinal axis of the tool. It avoids formation of build up edge, controls the direction of

A cantilever beam of 1800 mm length is subjected to point loads of 3.5 kN, 4.3 kN, 1.2 kN and 2.8 kN at distances of 400 m, 400 m, 400 m 300 m and 300 m, respectively from the fixe