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

SA-2, Problem with structure analysis-2

Problem with structure analysis-2

Determine the diameter of the footing, A circular footing is resting on a s...

A circular footing is resting on a stiff saturated clay with qu = 250 kN/m 2 . The depth of foundation is 2 m. Verify the diameter of the footing if the column load is 600 kN. S

Determine the shearing resistance of sand, In a drained triaxial compressio...

In a drained triaxial compression test, a saturated specimen of cohesionless sand fails at a deviator stress of 450 kN/m 2 when the cell pressure was 135 kN/m 2 . Search the ef

Transit sheds and warehouses, Transit Sheds and Warehouses: These are ...

Transit Sheds and Warehouses: These are sheds constructed as steel frames or RCC frames with a steel truss, with galvanised iron or asbestos cement sheets. Transit sheds may b

Concrete, if the slump of concrete drops how to rectify

if the slump of concrete drops how to rectify

Insulating washer between steel bolts and aluminium plates, Q. Insulating w...

Q. Insulating washer between steel bolts and aluminium plates? Corrosion of aluminium can be activated by putting it in contact with another metal in the presence of water. Thi

Surveying, Explain about reciprocal ranging

Explain about reciprocal ranging

Granite tiles for construction material, Q. Granite Tiles for construction ...

Q. Granite Tiles for construction material? At every important station for public urinals granite may be used as wall cladding drain and foot rest material. The water sinks at

Calculate the degree of saturation of the soil, A clay sample, having its n...

A clay sample, having its natural moisture content, weighs 0.333 N. The specific gravity of solids of this soil is 2.70. After oven-drying, the soil sample weighs 0.2025 N. The vol

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