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

Shear and moment diagrams, Shear and Moment Diagrams Determine the anal...

Shear and Moment Diagrams Determine the analytical solution for the maximum stress of the beam shown; compare with stress results from Solid Works. Draw shear and moment diagra

Mircometer, How is a micrometer used?

How is a micrometer used?

Thermodynamics, show that work is a path function and not a point funtion ?...

show that work is a path function and not a point funtion ?

Plate clutch pressure height, Plate clutch pressure height: Check plate cl...

Plate clutch pressure height: Check plate clutch pressure leg height by placing the plate clutch pressure on the surface plate. Plate clutch pressure should not tilt on the surfac

Product Design and Development, I need a work to be done in the field of te...

I need a work to be done in the field of technical function generation for a product development process and about 3000-3500 words on any theoretical topic related to product devel

Explain the back rake angle, Explain the Back Rake Angle It measured th...

Explain the Back Rake Angle It measured the downwards slope of the top surface of the tool from the nose to the rear along the longitudinal axis. Its purpose is to guide the di

Determine the maximum torque - shaft, Determine the maximum torque - shaft:...

Determine the maximum torque - shaft: Determine the maximum torque that can be safely transmitted by a shaft of 400 mm diameter, if (a) the maximum allowable shear stress i

Fault detection and isolation for lateral flight of an uav, Introduction   ...

Introduction   Fault tolerance is very important for aircraft flight control.  The majority of the faults occur in the sensors and actuators onboard the aircraft.  Once a fault

Boiler, what is boiler ? what is hard & soft water? how can we convert raw ...

what is boiler ? what is hard & soft water? how can we convert raw water into soft water?

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