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Note:

  1. Iron: The amount of ozone requied is 0.44mg Ozone/mg Fe
  2. Manganese: The amount of ozone requied is 0.88mg Ozone/mg Mn
  3. Hydrogen Sulphide: The amount of ozone requied is 3mg Ozone/mg H2S, but in practice, the excess ozone is used (4mg Ozone/mg H2S).
  4. COD: The amount of ozone requied is 2.5mg Ozone/mg COD
  5. Disinfection: Typically 1mg/L for 1 minute Ct is sufficient to disinfect water.