Waste water refers to all effluents and sewage coming from various sources like industries, houses, agricultural activities etc.

On the basis of its origin waste water are mainly classified into two categories:



Domestic sewage includes all used up and spent water from houses, residences. It mainly carries water from kitchen, toilets and laundries.

Industrial Sewage is generated from water released from different commercial and manufacturing units such as textiles, printing, F&B, and production to name a few.

Waste water from all these sources contain suspended solids, hazardous substances, etc. which may cause serious threat to the environment. Thus treatment of this water is very necessary before discharging it into fresh water bodies.

In water treatment pollutants which causes harm to the environment are removed. These pollutants impose serious threat to the aquatic life and may also cause many water borne diseases.

The main objective of waste water treatment is thus removal of all impurities, toxic components from water so that it can be returned safely to the environment.

Coagulation and flocculation are the two most important processes carried in waste water treatment program.


Impurities are mainly present as colloidal suspensions in waste water. But the suspended solids settle out very slowly because they carry like electrical charges on the surface which cause repulsion.Thus coagulants carrying opposite charges are added to water which neutralize this surface charge and destabilize the repulsive forces among the colloids.

Both inorganic and organic coagulants are used in waste water treatment. An appropriate blend of both coagulants are very efficient in sludge generation.

Coagulant chemicals catered by Chemtex are:

• Polyamine,

• Poly DADMAC,

• Poly DCDA

• Ferric Chloride,

• Poly Aluminium Chloride.

This range of chemicals are very efficient in causing charge neutralization of water particles and help in easy settling of solid particles.


Flocculation is a very important process for waste water treatment. It is a physical process in which the coagulated particles are clumped together forming flocs. The flocculating agents are mainly polymeric compounds which form linkage among the flocs. The polymer chain gets adsorbed on the surface of the particles and the small flocs bind together forming bigger clumps or agglomerates.

Different types of poly electrolytes are used as flocculating agents.

The products which CHEMTEX cater under Polyelectrolyte Flocculant are Non-ionic Polyelectrolyte, Secondary Flocculation with polyelectrolyte, Dewatering Polyelectrolyte, Deoiling Polyelectrolyte.

These polymers have precise pH value and are water soluble which make them suitable for different industrial application.