PROCESS OF WTP

     1)Cascade Aerator
     2)Pri Chlorination Or Alum dosing     
     3)Flash mixing
     4)Clariflocculator
     5)Filtration
     6)Post chlorination (Disinfection) & Distribution

 Cascade Aerator- 
this is first process of water treatment plant in this process
we removes unwanted gases like H2S(HydrogenSluphide),
CH4 (Methane) and Co2 (Carbon dioxide) from the water
(and Increasing Oxygen concentration in water.

Pri Chlorination Or Alum dosing (Chemical Dosing )- 


Second process in the pre chlorination dosing. this process 
chlorine adding in water disinfect it. And kills Bacteria,
protozoans, virus  etc. chlorine is a highly toxic chemical
which kill germs. also we mix alum in water .Aluminum
Sulfate, Shortly known as Alum, when added to raw water
reacts with the bicarbonate alkalinity present in water and
forms a gelatinous precipitate. This flock attracts other fine
particles and suspended material in raw water, and settles
down at the bottom of the container.

 Note:- Sometimes we use lime instead of chlorine because lime also works like chlorine.

Flash mixing- 

In  flash mixing Alum and water mixture in this process by rotating motor & Gravity .

Clariflocculator (Coagulation & Flocculation)- 

Clariflocculator is a combination of flocculation and clarification in a single tank. It has two concentric tanks where inner tank serves as a flocculation basin and the outer tank serves as a clarifier. in this process the fine particle and suspended material accumulate and settled down in surface by alum  and heavy particle are settle down in sedimentation process.

Filtration- 

Next process is filtration in this process water flows through a filter designed to remove particles in the water. The filters are made of layers of sand and gravel, and in some cases, crushed anthracite. Filtration collects the suspended impurities in water and enhances the effectiveness of disinfection. The filters are routinely cleaned by back washing.

Post chlorination (Disinfection) & Distribution - 

After the water has been filtered, a disinfectant (for example, chlorine, chloramine) may be added in order to kill any remaining parasites, bacteria, and viruses, and to protect the water from germs when it is piped to homes and businesses...


If you want more information about WTP process, 
Please follow this below link.