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Ozone With Activated Carbon for Drinking Water Treatment

Municipal Water Supply

  1. Rasheed Ahmad

Published Online: 15 JUL 2005

DOI: 10.1002/047147844X.mw391

Water Encyclopedia

Water Encyclopedia

How to Cite

Ahmad, R. 2005. Ozone With Activated Carbon for Drinking Water Treatment. Water Encyclopedia. 1:357.

Author Information

  1. Khafra Engineering Consultants, Atlanta, Georgia

Publication History

  1. Published Online: 15 JUL 2005


Ozone is a very strong oxidant and powerful disinfectant that has been used for water treatment in many countries. In addition to its strong oxidation and disinfection properties, ozone has other beneficial effects. Ozone aids in coagulation and flocculation, acts effectively in taste and odor removal, does not produce halogenated disinfection by-products (DBPs) except in bromide-rich water, extends filter runs due to lower rates of head loss, and helps in removing natural organic matter in conventional treatment or in activated carbon adsorption processes. However, the use of ozone has limitations. It does not produce a persistent disinfectant residual. Ozone is relatively costly, and it produces suspected carcinogens like bromates in bromide-rich water.


  • ozone;
  • activated carbon;
  • granular activated carbon (GAC);
  • biological filtration;
  • disinfection by-products (DBPs);
  • filter-adsorbers;
  • postfilters;
  • preozonation;
  • natural organic matter (NOM)