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

Punches -tool and equipment , Punches Figure: Punches A bar wh...

Punches Figure: Punches A bar which carries a sharp point at one end and used to make a permanent mark on a part is called punch. The point is hard and tempered so tha

Evaluate force and moment - mechanics, Evaluate force and moment: Wha...

Evaluate force and moment: What force and moment is transmitted to supporting wall at A   A force of 15 KN is transmitted to wall along with anticlockwise mome

Assumptions made in deriving torsional formulas, Assumptions made in derivi...

Assumptions made in deriving torsional formulas: What are assumptions made in deriving torsional formulas?                                           Sol.: The torsion

Illustrate moisture content test, Q. Illustrate Moisture content test ? ...

Q. Illustrate Moisture content test ? Moisture content test: Moisture is an important constituent of moulding sand. Its content in the moulding sand can be estimated as given b

Classification of arc welding power sources, CLASSIFICATION OF ARC WELDING ...

CLASSIFICATION OF ARC WELDING POWER SOURCES As we have know, different  welding processes require different operating conditions & the power sources are also necessarily differen

#title.scale, actual division 2km is shown as 1 cm in a map.construct a cle...

actual division 2km is shown as 1 cm in a map.construct a clean scale to measure km which can travel a distance upto 30 km.Show measurement of 18 km in the scale

Objectives of motorcycle servicing , Objectives After studyingmotercyc...

Objectives After studyingmotercycle servicing, you should be able to appreciate the importance of regular servicing and maintenance of a motorcycle and also to recommen

Welding processes, Q. Show the Welding processes The following welding ...

Q. Show the Welding processes The following welding processes are permitted: Shielded Metal-Arc Welding (SMAW) - Do not use SMAW for the root pass of single side groove we

Perform a beam analysis, You need to sketch shear force and bending moment ...

You need to sketch shear force and bending moment diagrams and estimate maximum bending and shear stresses acting on the beam using your knowledge in beam analysis.  Please note

Three forces act on particle - mechanics, Three forces act on particle: ...

Three forces act on particle: Thr ee forces act on particle ' O ' as shown in the figure given below. Determine the value of ' P ' such that resultant of these three forces

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