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

Define what is nose radius, Define What is Nose Radius? The nose radius...

Define What is Nose Radius? The nose radius is provided to increase finish and strength of the cutting tip of the tool. Small radii will produce smooth finish and are used on t

Nature of shear force and bending moment - load variation, Define the natur...

Define the nature of shear force and bending moment under load variation. Sol.: The nature of SF and BM variation under two-load region is given in the table below

Lifting machines, Lifting machines: Basic definitions of the lifting m...

Lifting machines: Basic definitions of the lifting machines and some lifting machines have been described. For each of these machines, derivation of the formulae for mechanica

Compound pendulum, Initial difference in radii at the junction of a compoun...

Initial difference in radii at the junction of a compound cylinder

A Composite from Multidirectional Laminates, A Composite from Multidirectio...

A Composite from Multidirectional Laminates                                              Figure: A Composite from Multidirectional Laminates Glass fibres usually u

Calculate machining time and material removal rate, Calculate Machining Tim...

Calculate Machining Time and Material Removal Rate A hole of 40 mm diameter and 50 mm depth is to be drilled in a mild steel component. The cutting speed can be taken as 65 m/

Rankine cycle with respect to p-v, Rankine cycle with respect to P-V, T dia...

Rankine cycle with respect to P-V, T diagrams: The steam having high pressure is expanded to a low pressure within a reciprocating engine or a turbine. If expansion is idea

Heat exchangers - air-conditioning guidelines, Q. Heat Exchangers - air-con...

Q. Heat Exchangers - air-conditioning guidelines? Location, size and capacity clearly indicated. Control valves indicated. Space for tube removal, keep space clear of pipes, va

Communication protocols applicable in holonic manufacturing , Communication...

Communication Protocols Applicable in Holonic Manufacturing System Communication amongst agents plays an essential role in the Holonic manufacturing system. Exchange of informa

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