Explain chlorine residuals, Civil Engineering

Assignment Help:

Explain Chlorine Residuals

Free Chlorine Residuals: Cl2, HOCl, OCl-  

Combined Chlorine Residuals: Chloramines (mono, di and tri chloramines)

The disinfecting ability of chloramines is much lower than that of free chlorine.

Satisfactory results can be obtained if a free chlorine residual of 0.2 to 0.5 mg/L can be maintained in the distribution system. Also if approved by health authorities  combined chlorine residuals in the range of 1 to 2 mg/L should maintained at distant points in the distribution system.    

 Trihalomethanes (the following) which are formed as a result of chlorination are harmful and this must be avoided.

CHCl3 trichloromethane (chloroform)

CHBrCl2  bromodichloromethane

CHBr2Cl dibromochloromethane

CHBr3   tribromomethane (bromoform)


Related Discussions:- Explain chlorine residuals

Example of magnetic dip, Example : Line AB was drawn with a magnetic ...

Example : Line AB was drawn with a magnetic bearing of 136° 45′ while the magnetic declination was 2° 30′ east In an old map. If magnetic declination is 3° 30′ west to what m

Maintenance of terminal building, Maintenance of Terminal Building: A...

Maintenance of Terminal Building: All accessories such as lighting, water, sanitation, telephone and public address system should be maintained in a good condition. Disposal

Explain the term - strength cement, Explain the term - strength cement ...

Explain the term - strength cement It should be appreciated that the tensioning arrangement shall have to be kept in place until tendons are cut. This shall depend on how quick

Explain resultant force on a given area of an inclined plane, Resultant For...

Resultant Force on a Given Area of an Inclined Plane The resultant force is calculated from the average pressure:    R = (AVERAGE P)(A)

Define lateral load - actions in pot bearings, Define Lateral Load - Action...

Define Lateral Load - Actions in POT Bearings? Lateral load is transferred from the piston to the POT by contact between the rim of the piston and the wall of the POT. The cont

Leveling, cooke''s reversable level

cooke''s reversable level

Simply supported steel frame help, I need some help sizing a rectangular pl...

I need some help sizing a rectangular plate that will distribute my load to the simply supported beams below.

Calculate the square foot of contact area for the formwork, A concrete crew...

A concrete crew will use the available steel form panels measuring 2'-6" wide x 4'-0" high to construct a 40'-6" long by 3'-2" high by 1'-6" wide concrete knee wall. The square

Shear strength of concrete., why do we use effective depth ''d'' in calcula...

why do we use effective depth ''d'' in calculating the shear capacity of uncracked Concrete beam. If it is uncracked, why cant we use the full depth ''D''.

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