Coagulation-flocculation-sedimentation, Mechanical Engineering

Assignment Help:

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)?


Related Discussions:- Coagulation-flocculation-sedimentation

Find the distance of weight ‘x’ from support, Find the distance of weight ‘...

Find the distance of weight ‘x’ from support: The t wo weights C = 2000N and D = 1000N are located on horizontal beam AB as shown in the figure given below. Find the d

Find the out value of force - cantilever truss, A cantilever truss is loade...

A cantilever truss is loaded and supported as shown in the figure given below. Find the out value of P , which would produce an axial force of magnitude 3KN in member AC .

Write the types and functions of column, Write the types and functions of c...

Write the types and functions of column. a) Explain surveying. Brie?y describe about the chain and accessories

Synthesize a mechanism to prepare a function, Synthesize a mechanism to pre...

Synthesize a mechanism to prepare a function y = log x for 1≤ x ≤ 2 where three precision points are needed, for these precision points Calculate φ 2 , φ 3 and ψ 2 , ψ 3 ; if Δφ

What is the eutectoid composition, Question 1 What is the eutectoid com...

Question 1 What is the eutectoid composition in the phase diagram? Question 2 For an alloy of 40%C/60%D at 400°C, indicate the phase/s that are present. It is not neces

How can we use of shrinkage allowance, Q. How can we use of Shrinkage allow...

Q. How can we use of Shrinkage allowance? Since metal shrinks on solidification and contracts further on cooling to room temperature, linear dimensions of the pattern is increa

Gyroscope, what is principle of gyroscope

what is principle of gyroscope

Ordinate dimensions-autocad, Ordinate Dimensions Ordinate dimensions ar...

Ordinate Dimensions Ordinate dimensions are not really a dimensions at all in that they did not indicate a measurement aur dimensions. Rather they annotate known co-ordinate po

Materials, ">http://www.expertsmind.com/questions/the-percentage-elongation...

">http://www.expertsmind.com/questions/the-percentage-elongation-of-the-metal-stress-30138407.aspx

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd