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

Illustrate brinell hardness tests, Q. Illustrate Brinell hardness tests? ...

Q. Illustrate Brinell hardness tests? Brinell hardness tests of the deposited weld, and heat affected zone shall be required for procedure qualifications of every welding proce

Welding transformer, Welding transformer The resistance welding transfo...

Welding transformer The resistance welding transformers step down the line tune of 2 to 20 V. The primary is connected to the line supply and is made from edge bent copper stri

Show geographic constraints of the plant, Q. Show Geographic constraints of...

Q. Show Geographic constraints of the plant? The layout of process units will be influenced by the geographic constraints of the site. Spacing is required between plant facilit

What is the objective of hydrostatic sensor paver machine, What is the obje...

What is the objective of hydrostatic sensor paver machine To eliminate the problem in screw conveyer extension of hydrostatic sensor paver machine as per screed width" The p

Introduction service and maintenance procedures , INTRODUCTIO : In Motorc...

INTRODUCTIO : In Motorcycle Servicing, we studied about servicing of a motorcycle. Here, you will study about the detailed procedures for motorcycle service and maintenance. The s

Balancing, A shaft carries three pulleys A,B and C. the pulleys B and C bei...

A shaft carries three pulleys A,B and C. the pulleys B and C being 1.2m and 2.1m from A. the pulleys are out of balance to the extent of 0.03, 0.05 and 0.04kg.m respectively and ar

Equilibrium conditions - non concurrent force system, Equilibrium condition...

Equilibrium conditions: What are equilibrium conditions for non concurrent force system? Sol.: For the Equilibrium of non concurrent forces there are three conditions:

Gyroscope, what is principle of gyroscope

what is principle of gyroscope

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