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

calculate the maximum power , The transmission output shaft for a heavy go...

The transmission output shaft for a heavy goods vehicle can withstand a safe working shear stress of 54MPa. Its outside diameter is 54mm and its internal diameter is 48mm. Calculat

Explain the function of the foundation, Explain the function of the foundat...

Explain the function of the foundation The function of the foundation is to ensure that the loads on the super structure are transmitted to the soil below the foundation withou

Determine the crippling load and safe load, A hollow mild steel tube 6 m lo...

A hollow mild steel tube 6 m long 4 cm internal diameter and 6 mm thick is used as a strut with both ends hinged. Determine the crippling load and safe load taking factor of safety

What is a quari static process, Illustrate the terms : (i) State (ii)...

Illustrate the terms : (i) State (ii) Process and (iii) Cycle What is a quari static process ? Illustrate with an example. What are point function and path function.

Dynamic magnifier-forced vibration-synchronous whirl, Dynamic Magnifier: ...

Dynamic Magnifier: This is function of frequency ratio. Forced Vibration: While the system is continuously excited by an external force or internally produced force, the v

Methods of analysis of trusses, Methods of analysis of trusses: What ...

Methods of analysis of trusses: What are the methods of analysis of trusses? What is found when the analysis of a system is done? Sol.:  The forces in the members of

CRANK SHAFT, TO FIND THE MAGNITUDE OF CRANK SHAFT

TO FIND THE MAGNITUDE OF CRANK SHAFT

Hydrometer-electrical instruments , Hydrometer: Hydrometer (Figure) is use...

Hydrometer: Hydrometer (Figure) is used to measure the specific gravity of battery fluid (electrolyte). Figure: Hydrometer

Determine contact reactions and force, Determine contact reactions and forc...

Determine contact reactions and force: Figure given below shows a sphere resting in smooth V shaped groove and subjected to a spring force. The spring is compressed to

Capp, explain capacity planning system

explain capacity planning system

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