Conventional Water Treatment

The term is used widely to cover a variety of treatment techniques, which have been used with success over the longer time scale to service a range of industrial and municipal requirements. The particular techniques used will vary according to the nature of the water source.

Most projects involve combining two or more treatment techniques to produce an economical means of achieving the desired result with each treatment step facilitating and/or adding to the next. A conventional treatment route for a 'flashy' surface water source would be Coagulation > Floculation > Clarification > Rapid Gravity Filtration > Disinfection to produce a potable water supply.

Non-standard contaminants might require additional treatment steps. For example

  • GAC filtration for removal of pesticides.
  • pH Correction / Remineralisation for 'thin' or low pH water supplies.
  • Fine filtration (>2 microns) for protection against Cryptosporidium Oocysts.

Generally ACWA use the term 'conventional' to refer to any and all 'Non-membrane' treatment techniques. ACWA offer all these treatment types but for convenience we have grouped them together for discussion as below.

  • Particle filtration
  • GAC
  • Chemical
  • Ion Exchange