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

SFD AND BMD, what is SFD and BMD? EXPLAIN

what is SFD and BMD? EXPLAIN

Evaluate the exit velocity, A perfect gas flows through a nozzle when it ex...

A perfect gas flows through a nozzle when it expends in a reversible adiabatic manner, the inlet conditions are 22 bar,, 500 o c, 38 m/s. At exit the pressure is 2 bar. Evaluate th

Elevator, These are differentiated from hoists by the fact that the opera...

These are differentiated from hoists by the fact that the operator rides with the load. There are many different types of drives for such elevators but in general electric

Calculate the shear flow in wall - flange areas, Calculate the shear flow i...

Calculate the shear flow in each wall of the fuselage section below. The flange areas are 1 sq in and the web thicknesses are 0.05 in. The material has modulus E = 10 mpsi and G =

Maximal conductances and reversal potentials, By introducing their model of...

By introducing their model of neural excitability in 1952, Alan Lloyd Hodgkin and Andrew Huxley not only shed light on the mechanism underlying a very important phenomenon in Physi

Automation material specifications, Q. Automation Material Specifications? ...

Q. Automation Material Specifications? Automation Material Specifications include the development and / or review of material specifications, and the review of data sheets, mat

Determine change in length of the bar, Determine change in length of the ba...

Determine change in length of the bar: A steel bar is subjected to loads as shown the given figure. Determine change in length of the bar ABCD of 18 cm diameter. E = 180

Iron carbon digram, Explain iron carbon diagram with all small details

Explain iron carbon diagram with all small details

Determine the excavation of soil, Determine the Excavation of soil Exc...

Determine the Excavation of soil Excavation of soil in open well foundations is done  by dredging with grab buckets or similar equipment. The volume of excavated soil always e

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