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

Dead centre -engine terminology , Dead Centre The position of the wor...

Dead Centre The position of the working piston and the moving parts which are mechanically connected to it, at the moment when the direction of the piston motion is reserved

Suspension system, Suspension System, Wheels and Tyres:  There are numerou...

Suspension System, Wheels and Tyres:  There are numerous types of suspensions for connecting the wheels to frame body. The suspension plays the vital role in handling and driving

Identification of pressure welds, Q. Identification of Pressure Welds? ...

Q. Identification of Pressure Welds? Pressure welds shall be identified as follows: a. Generally each weld shall be stamped adjacent to the weld with the welder's identity c

Determine force exerted by the jet, (a) Describe the terms "Fluid jet" & "V...

(a) Describe the terms "Fluid jet" & "Vane" in Fluid Machine. (b) What is impulse - momentum principal in analysis and design of turbo machines. What are the assumptions made

Air velocity calculations in aircraft fans, how to calculate Air velocity ,...

how to calculate Air velocity , pressure and power done by aircraft fans

Design and construction of waste heat boilers, Shop assembled, steam drum, ...

Shop assembled, steam drum, risers, downcomers, and all other related equipment on the steam side shall be designed, fabricated and hydrostatically tested to all requirements of AS

Illustrate the babcock and wilcox boiler, How the boiler are classified? Sk...

How the boiler are classified? Sketch and define the babcock & Wilcox boiler and also Compare the water tube boiler and fire tube?

Create a pay - off table, Bhasker operates a retail shop and sells the high...

Bhasker operates a retail shop and sells the high priced "Hot Food" thermoware. Each unit I priced at Rs.250. Experience has shown that the weekly demand schedule for items is as f

Explain coating repairs, Q. Explain Coating Repairs? Any coatings found...

Q. Explain Coating Repairs? Any coatings found to be damaged or that do not pass the inspection stage shall be recoated or repaired at the expense of the Applicator. The entire

General tools of tool and equipment , GENERAL TOOLS: General tools include...

GENERAL TOOLS: General tools include spanners, screw drivers, files, pliers, vices, punches, mallets, chisels, grinders, drilling machine, oil and grease guns, etc.

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