Drinking Water Purification

It is common practice in drinking water purification to use activated carbon in combination with other treatment processes, such as flocculation, oxidation, filtration, etc. Used in this way, activated carbon can serve a variety of functions:

Adsorption of solute organic matter
The removal of solute organic substances is accomplished primarily through adsorption processes. If the water to be treated contains biodegradable substances, the purification effect can be enhanced by settling micro-organisms on the activated carbon. Organic components in water may come from a number of different sources. Even ground and surface water may occasionally contain such organic substances as humous matter in concentrations high enough to affect taste. Surface water, particularly river water, still contains - even after bank filtration - numerous organic compounds, of which only a fraction are normally identifiable.
It has been determined that groundwater is polluted to an increasing extent by chlorinated hydrocarbons and organic compounds originating from pesticides, herbicides and insecticides used in intensive agriculture.
This man-made water pollution, in particular, not only affects the odour and taste of water but may also have long-term toxic or carcinogenic effects in human beings when consumed over a period of years.

The use of activated carbon makes it possible to remove even the smallest traces of such harmful substances very efficiently from water. Special, highly active, abrasion-resistant and easily regenerable activated carbons have been developed for water purification applications.


Dechlorination, Deozonation
Oxidising agents such as chlorine, hypochlorine, chlorine dioxide, hydrogen peroxide and ozone are frequently used for disinfection and organic substance removal in water purification systems. In most cases, excess oxidants must then be removed from the water. This can be accomplished effectively through catalytic decomposition of the oxidants on the surfaces of granular activated carbon.

The smaller the activated carbon particle, the greater the dechlorination capacity. 


Recommended AC qualities:

Granular
Hydraffin 30N
Hydraffin XC30
Hydraffin CC8x30



Powdered
Hydraffin P800
Hydraffin MB4 

Further technical documents and samples are available on request.