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

Module assembly site preparation, Q. Module Assembly Site Preparation? ...

Q. Module Assembly Site Preparation? To set a module on the piles installed on project site, the following preparations shall be made: The Designer shall provide design elev

Plant level - safety organization, Plant level - Safety Organization ...

Plant level - Safety Organization This level works at plant level and would directly report to general manager safety. There must be four plant safety managers as recognized

#power plant, Components of power plant &it''s functions

Components of power plant &it''s functions

Flux feeding & recovery system, FLUX FEEDING & RECOVERY SYSTEM The flux i...

FLUX FEEDING & RECOVERY SYSTEM The flux is fed by gravity from the flux delivery hopper mounted on the welding head through a tube into the welding zone. Flux feeding is normally

Explain match plate pattern, Match plate pattern These are extensions o...

Match plate pattern These are extensions of the previous type. Here the cope and drag patterns along with the gating and the risering are mounted on a single matching metal or

Cycle of operation of four-stroke spark ignition engine, With neat diagram ...

With neat diagram illustrate the cycle of operation of four-stroke spark ignition engine. In what respects four-stroke cycle CI engine differ from that of SI engine ?

What is the full form of step, What is STEP The STEP (Standard for Exte...

What is STEP The STEP (Standard for External Representation of Product Data) project is supported by the ISO workgroup TC 184/SC4. it is also sometimes called Standard for Exch

Functions of the piston , Functions of the Piston To transmit forc...

Functions of the Piston To transmit force of explosion to the crankshaft. To form a seal so that high pressure gases from the combustion chamber do not escape into th

Currency bull spread and bear spread, Currency Bull Spread and Bear Spread:...

Currency Bull Spread and Bear Spread: A currency bull spread is constructed by buying a call option for a particular underlying currency and simultaneously writing a call opti

Isentropic flow through the nozzle, Isentropic flow through the nozzle: ...

Isentropic flow through the nozzle: In an isentropic flow through the nozzle, air flows at rate of 600Kg/hr. At inlet to the nozzle, the pressure is 2Mpa and temperature is 1

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