Activated carbon is charcoal that has been treated with oxygen to open up millions of tiny pores between the carbon atoms. The treated or activated carbon has a massive surface area (2000 - 3000 square metres per gram of activated carbon) making it highly effective at adsorbing tastes and odours, as well as chlorine and organic colour from water.
An activated carbon filter is a filter housing (either a cartridge filter housing or a granular activated carbon media filter is used for activated carbon filtration) containing granular activated carbon or an activated carbon block cartridge.
Low flow applications - activated carbon cartridge filters: water flows from the outside of the activated carbon cartridge to the inside of the activated carbon cartridge, through a collector tube, and out to process or the point-of-use. When the activated carbon becomes exhausted, or blocked with suspended matter, the cartridge has to be replaced.
High flow applications - At CWC we use our conventional multimedia sand filter design, replacing a portion of the multimedia filter repack with granular activated carbon. This allows the filter to act as both a sand filter and an activated carbon filter, removing suspended particles, taste and odour, chlorine and organic colour. When the activated carbon becomes blocked with suspended matter, the filter can be backwashed in the same way as a conventional sand filter. When the activated carbon in the filter becomes exhausted, it is usually replaced, although some of the systems we manufacture are fitted with steam sterilization components, to regenerate the activated carbon bed.
For more information on low flow applications using activated carbon cartridge filters, see our cartridge filter section. The following information is applicable only to backwashable granular activated carbon filters.
|Model||Flow Rates||Inlet/Outlet Ports|
|Service Flow Rates||Backwash|
|Minimum flow (m³/hr)||Maximum flow (m³/hr)||Flow (m³/hr)|
Operating pressure: 200 - 600 kPa
Power supply (automatic units): 220 VAC 50Hz
Temperature range (water temp): 5-35°C
Activated carbon filters are capable of 40-micron effluent water quality under normal operating conditions, although they should not be used as a sole source of filtration.
In order to accurately size an activated carbon filter for your residential, commercial or industrial application, we will need to know the following:
Your local approved CWC distributor can help you calculate your filtered water needs, and can arrange for a professional water analysis to be taken. For more information about granular activated carbon filters and how the CWC filtration process can help you in your home or business, contact CWC today.