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WATER TREATMENT GUIDE

COPYRIGHTę Vertex Hydropore 2010

Water source has a major influence upon the choice of filtration, purification and disinfection technology required. Technologies suitable for one water source may be inefficient when used on another. For example most disinfection processes are ineffective upon water with high turbidity.

Below is a summary of technologies often considered for various water sources.

Disclaimer: This information is provided as a guide only and may not be applicable to your specific application. You should always obtain advice from a water treatment specialist for each individual case.  This information must not be construed as a performance guarantee.

 

Rain water harvesting in enclosed tanks:


Coarse filtration         self cleaning screens or bag filter or cartridge filter
Fine filtration              self cleaning ultrafilter or 1 micron cyst rated cartridge
Tannin reduction        anion resin
Organic reduction      activated carbon filtration

Disinfection                chlorine, ozone or ultraviolet irradiation (potable water requirement only)



River water or dam water:

Coarse filtration          backwashing multimedia filtration
Fine filtration               self cleaning ultrafilter
Chemical reduction    reverse osmosis @ 10 to 15 Bar
Disinfection                 chlorine, ozone or ultraviolet irradiation (potable water requirement only)



Town water:

Coarse filtration           
backwashing multimedia filtration plus bag filter or cartridge filter
Dechlorination             activated carbon, sodium metabisulphite
Fine filtration                1 micron cartridge filter
Chemical reduction     reverse osmosis @ 10 to 15 Bar; plus deionisation (electrodeionisation) for high purity applications
Disinfection              
   chlorine, ozone, ultraviolet irradiation (potable water requirement only) 


Spring water:

Coarse filtration          
self cleaning screens or bag filter or cartridge filter
Fine filtration               self cleaning ultrafilter or 0.2 micron rated cartridge
Disinfection                 ozone or ultraviolet irradiation (potable water requirement only)                                


Bore water:

Oxidation                       air, chlorine, chlorine dioxide - only when iron is present
Coarse filtration            backwashing multimedia filtration plus bag filter or cartridge filter
Fine filtration                 1 micron cartridge filter
Mineral salt reduction   reverse osmosis @ 15 to 25 Bar
pH adjustment               sodium hydroxide injection or calcite filter
Disinfection                   chlorine, ozone or ultraviolet irradiation (potable water requirement only)
 

Sea water:

Disinfection                   chlorine
Coarse filtration            backwashing multimedia filtration plus bag filter or cartridge filter
Dechlorination               activated carbon, sodium metabisulphite
Fine filtration                 1 micron cartridge filter or self cleaning ultrafilter
Mineral salt reduction   reverse osmosis @ 60 Bar
pH adjustment               sodium hydroxide injection or calcite filter
Disinfection                   chlorine, ozone or ultraviolet irradiation (potable water requirement only)


Process water:

Coarse filtration            backwashing multimedia filtration

Fine filtration                 self cleaning ultrafilter
Chemical reduction      reverse osmosis
Disinfection                   chlorine, ozone or ultraviolet irradiation (Class A recycled water requirement only)


Grey water and black water:

Pretreatment                 membrane bioreactor (MBR) or ultrafiltration

Disinfection                   ultraviolet
Chemical reduction      reverse osmosis @ 10 to 15 Bar
Disinfection                   chlorine, ozone or ultraviolet irradiation (Class A recycled water requirement only)

 

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