Coagulants are used for treatment of all kinds of water
Coagulation is the oldest known water treatment method
In industry, coagulants are frequently used for water treatment
In drinking water production, coagulants remove particles, humic substances and colour
Coagulants produce healthy and enjoyable drinking water
Coagulants are used for treatment of all kinds of water

In addition to their role as inorganic coagulants, aluminium and iron salts are used to:

  • Accelerate the setting time of concrete (aluminium salts)
  • Add vital nutrients to animal feed compounds (iron salts)
  • Create pigments used in the paint and cosmetics industries (iron salts)
  • Effectively treat anaemia in human beings (iron salts)
  • Fill fire extinguishers (aluminium salts)
  • Fix colours on textiles (aluminium salts)
  • Manufacture cosmetics and anti-perspirants (polyaluminum chlorides)
  • Produce zeolites used as commercial adsorbents (aluminium salts)

Applications

Other Applications
In addition to their role as inorganic coagulants, aluminium and iron salts are used in many other applications.
Industrial Uses
For industry, coagulants provide a method of reusing water in a cost-effective way that does not comprise the industrial process.
Drinking Water
In order to protect our health, all drinking water must be cleared of pathogens and impurities before it is used.
Paper Industry
Inorganic coagulants are used in two critical parts of the paper production process: sizing and retention.
Waste Water
To ensure the water does no harm to people or the environment when it is released, waste water must be treated to reduce the level of contaminants to acceptable levels.

FAQs

How do inorganic coagulants work?

Coagulants have a positive electrical charge. By contrast, particles which are dissolved or suspended in water typically have a negative charge. The positive charge of the inorganic coagulant neutralises the negative charge of the particle and the two bind together (coagulate) in larger particles in a process known as flocculation.

These larger particles (known as floc) are heavy and quickly settle to the bottom of the water in a process called sedimentation. Lighter flocs can be removed from the water using filters. Different coagulants target different types of particles in the water.

 

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