Drinking Water treatmentOver view

Sources of drinking Water
Sweet water low TDS
Salty Water high TDS

Sweet Water:
* Main Sources:

—Surface water i.e. lakes, rivers,
—Well water
—Rain water
Typically not exceeding 500 in TDS

Salty Water
*Main Sources:

—Sea, lakes, well water
Typical TDS 2000-35,000

Typical Treatment Domestic Sweet/salty Water

—Filtration
—Disinfection

Filtration

—For domestic sweet water             salty water
—Sand filter                                              same
—Cartridge filtration                              same
—UF filter                                                 same
—Softening                                               same
—NA                                                            RO

Disinfection

* Controlled chemical dosing of chlorine

—Chlorine is most common and strong oxidizing disinfectant
> Advantages of chlorine : leaving chlorine free trace
>Disadvantages:  it is chemical hence harmful
—Tight monitoring
—odor

* Ozone is gas and strongest oxidant

—Highly effective when used properly
>Advantages: effective, and safe to use
>Disadvantages: needs proper control, leaves no trace

*UV is strong disinfectant using UV light

>Advantages: effective, and safe to use
>Disadvantages:Leaves no trace