Wastech is the leading importers and stockists of Activated Carbon
Activated carbon is usually formed from coal or coconut shells that are converted to charcoal and then processed to create a very porous material with a huge surface area that can be used for adsorption or reaction. As a result, it is a very effective media for removing a wide range of contaminants from portable and industrial water supplies as well as industrial and municipal waste water. In large applications, once exhausted, the carbon can be reprocessed and reused.
Activated carbon is used in a large range of applications in both powder (PAC) and granular (GAC) forms.
PAC is ideal on large surface water treatment plants as it requires no fixed cost and can simply be added to flocculent tanks at a prescribed rate. The activated carbon is then removed as part of the flocculation process or can be filtered mechanically. The treated water is then suitable for supply. It is often more cost-effective to use powdered activated carbon to remove seasonal taste, odour and toxins, created by biological action in surface water sources than a more permanent process.
Unlike PAC applications GAC is usually held in a fixed filter bed and operated until the carbon bed is exhausted. The carbon is then removed from the vessel and reactivated, usually by heat treatment off-site.
Activated carbon is typically used to remove contaminants from water such as:
- Aromatic compounds such as phenol
- absorbable organic halogens
- Non-biodegradable organic compounds
- Colour compounds and dyestuffs
- Chlorinated/halogenated organic compounds
- Toxic compounds
- Compounds that will inhibit biological treatments
- Oil removal in process condensate
- Halogens, especially chlorine that will oxidises down stream processes
- Organics that will foul ion exchange resins or RO