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

Design the curtain to touch the seabed, Question For fixing of silt cur...

Question For fixing of silt curtains, what is the reason that it does not desirable to design the curtain to touch the seabed ? Answer Silt finished are resistant ve

Working from whole to part in survey, a clear illustration about working to...

a clear illustration about working to part principle and some examples

Define special considerations for underwater inspection, Define Special con...

Define Special considerations for underwater inspection? Once a diver enters the water, there environment changes completely. Visibility decreases and is often reduced to near

Varigon theorem, Ask questio #Minimum 100 words accepted# what is varigon ...

Ask questio #Minimum 100 words accepted# what is varigon theorem and what are their application ? its examples

Calculate the initial height of the stockpile, On a 5-acre level terrain bu...

On a 5-acre level terrain building site, an earthwork contractor has instructed her crew to strip and grub the topsoil of a 60,000-ft 2 proposed building pad to a minus 2-ft sub-g

Verify the intensity of vertical stress at a point, Verify the intensity of...

Verify the intensity of vertical stress at a point A line load of 100 kN/metre run extends to a long distance. Verify the intensity of vertical stress at a point, 2 m below the

Stress analysis, • The previous load analysis represents a first and necess...

• The previous load analysis represents a first and necessary step in the analysis of the given structure but it does not tell us whether the given load can be safely supported (i.

Explain in brief about the term - anchorage, Explain brief about the term -...

Explain brief about the term - Anchorage A device used to anchor tendons at the end of a concrete member is called as an anchorage in the case of post-tensioned concrete. In th

Advance structure engg, need help for assignment that requires strand 7 and...

need help for assignment that requires strand 7 and autocad

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