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

Ansys program, i want to analysis and test using fluent ansys

i want to analysis and test using fluent ansys

#thermodynamics., #A spherical aluminum vessel has an inside diameter of 30...

#A spherical aluminum vessel has an inside diameter of 30 cm and contains water at 80 ?C, with a quality of 1%. The vessel is then heated until the water inside is saturated vapor.

Define the isolated and combined footings, Isolated and Combined Footings ...

Isolated and Combined Footings Individual columns are generally supported on isolated footings. A typical isolated footing is shown in Figure. This arrangement is suitable when

What is floating foundation, What is floating foundation? Floating Foun...

What is floating foundation? Floating Foundation: Raft or mat is also recommended when the soil mass contains compressible layers or the soil stratum is variable. In such ca

Evaluate power transmitted by shaft, Evaluate power transmitted by shaft: ...

Evaluate power transmitted by shaft: How do you evaluate power transmitted by shaft (P)? Sol.: Consider force 'F' Newton's acting tangentially on shaft of radius ' R '.

Program evaluation and review techniques, Program Evaluation and Review Tec...

Program Evaluation and Review Techniques: The Rola and Cola Corporation is a professional II nursing home aspiring to become I nursing home. It desires to provide the ultimate

What is called materials which can store electrical energy, Materials which...

Materials which can store electrical energy are called (A) magnetic materials.  (B) semi conductors. (C) dielectric materials.  (D) super conductors. Ans: Mater

Copper alloys, Copper Alloys Some alloys of copper are employed in ind...

Copper Alloys Some alloys of copper are employed in industry for varying causes. Copper forms alloys along with zinc or the brasses, tin or the bronzes, along with tin and pho

Using bode plot calculate phase margin, Using Bode plot calculate (a) Phase...

Using Bode plot calculate (a) Phase margin (b) Gain margin (c) Stability of closed loop system. The open transfer function of the system is

Applications of Numerical Methods in Mechanical Engineering, Various applic...

Various applications of numerical methods in the field of m=numerical engineering.

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