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

Find the stresses by finite method, The stepped bar in Fig Q6 is stretched ...

The stepped bar in Fig Q6 is stretched along the vertical axis and the maximum upward displacement is found to be 0.008 m. The bar has cross-sectional areas of A 1 and A 2 ov

Introduction to entrepreneurship development , INTRODUCTION: In the previo...

INTRODUCTION: In the previous unit, you studied about the motorcycle and its various parts and systems. In this unit, we shall learn the various aspects of Entrepreneurship Develo

Determine the critical load, Determine the critical load (W crit ) to ...

Determine the critical load (W crit ) to cause elastic instability of the rigidly jointed frame shown in Figure Q2. The frame members have constant bending stif

Natural polymers, Natural Polymers Rubber is individual natural polyme...

Natural Polymers Rubber is individual natural polymer and was illustrated earlier. Specific trees exude thick liquid that solidified in brittle material termed as rosin. Shell

Types of cooling system , Types of Cooling System: Two types of cooling sy...

Types of Cooling System: Two types of cooling system are used in two wheelers. (a) Natural air-cooling. (b) Forced air-cooling.

Potential energy and kinetic energy- thermodynamics, Potential energy (PE) ...

Potential energy (PE) The energy possessed by body or system by virtue of its position above the datum level. The work done is because of its falling on earth's surface. Po

Describe electron beam welding, Discuss any three of the following:- (i)...

Discuss any three of the following:- (i) Electron Beam Welding (ii) Friction Welding (iii) Thermit Welding (iv) Gas Welding Give their advantages, Limitations, and a

Assignemnt , A heating section consists of a 10 in diameter duct which hous...

A heating section consists of a 10 in diameter duct which houses a 8 kW electric resistance heater. Air enters the heating section at 14.7 psia 40oF, and 35 percent relative humidi

Theory of mechanics , analyze a six bar linkage to get the position, veloci...

analyze a six bar linkage to get the position, velocity and acceleration

Necessity of tyres , Necessity of Tyres To supports the motorcycle...

Necessity of Tyres To supports the motorcycle load. To provide cushion against shocks. To allow smooth handling of motorcycle. To transmit driving and braking

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