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Criteria for a Chemical to be Suitable as Water Disinfectant in Water Supplies

Environment and Health

Criteria for a Chemical to be Suitable as Water Disinfectant in Water Supplies
A chemical can be suitable for use as a disinfectant in water supplies if it satisfies the following criteria:

  1. Should be able to destroy the pathogenic organisms in the water,
  • within the contact time available and
  • This capability should not be unduly affected by the range of the physical and chemical properties of the water e.g. temperature, pH and mineral constituents
  1. Should not leave residues which
  • render the water toxic or
  • impart colour or
  • make it unpotable in any other way
  1. Availability should be easy and at a reasonable cost
  2. Should have the property of leaving residual concentration to tackle small possible recontamination
  3. Should be detectable by practical, rapid and simple techniques, even in small concentrations, to permit regulation of the efficiency of the disinfection
    Chlorine satisfies most of the above criteria hence is widely used

OT and OTA test: Orthotolidine (OT) test and Orthotolidine – Arsenite (OTA) test

Membrane processes in water purification: Membrane Processes in Treatment of Drinking Water

Super Chlorination and Break Point Chlorination: Super Chlorination and Break Point Chlorination (Disinfecting Polluted Water)

Slow sand filter: Slow Sand Filter (Biological Filter)

Rapid sand filter: RAPID Sand Filter (Mechanical Filter)

Purification of water at a large scale: Water Purification at a LARGE SCALE (for water supply)

Criteria for a Chemical to be Suitable as Water Disinfectant in Water Supplies: Criteria for a Chemical to be Suitable as Water Disinfectant in Water Supplies

Water Supplies Disinfection with Chlorination: Water Supplies Disinfection with Chlorination

Principles of Chlorination: 5 Principles of Chlorination

Methods of Chlorination in Water Supplies: Methods of Chlorination in Water Supplies

Horrock's Apparatus: Horrock’s Apparatus

Disinfection of well during emergency: Disinfection of Wells during an Emergency – The Double Pot Method

Double Pot method: Disinfection of Wells during an Emergency – The Double Pot Method

Disinfection of Wells: Disinfection of Wells

OT and OTA test: OT and OTA test

Domestic or Household Purification of Water: Domestic or Household Purification of Water