Activated carbon filter system is an popular and widely used system during water pre-filter system. It adopts activated carbons as filter material and FRP tanks (also available in stainless steel or carbon steel tanks) as the vessel. In the system, it can help to absorb residual chlorine, organics and suspended impurities and it can provide good conditions for subsequent Reverse Osmosis purification.
Besides, the carbon filter can effectively ensure the service life of post-stage equipment, improve effluent water quality, prevent pollution, especially prevent free residual chlorine poisoning pollution in reverse osmosis membrane, ion exchange resin.
Activated carbon, different from normal charcoal, is produced through activation process. It produces the high absorptive pores. This system takes advantage of the amazingly vast surface area possessed by activated carbon to eliminate the color, odor, taste in the water to improve the water quality.
Besides, it can eliminate the chlorine from water. Activated carbon filter is the basic and popular system during water treatment, the filter media is inexpensive and high efficiency to reduce project cost and improve water quality.
Treated Elements
Water Quality
Carbon filter system adopts granular activated carbons to further remove residual chlorine, organics, suspended impurities and provide good water quality in the following reverse osmosis purification treatment.
Filter. The granular activated carbon has high carbon content, large molecular weight, large specific surface area for effective physical absorption of impurities in water. When the water flow through the pore of activated carbon, most of suspended particles, organics, etc are absorbed into the pore under the VDW (Van Der Waals' force).
At the same time, absorbed chlorine (hypochlorous acid) reacts on the surface of activated carbon and is reduced into chloride ions, thus the chlorine is effectively removed. After treated, the total residual chlorine < 0.1 ppm, which satisfy the RO (reverse osmosis) purification water quality requirements.
Backwash. While the filter operation, the intercepts in the pores and on the surface gradually increase, the pressure difference before and after the filter increases, until it fails. Under normal circumstances, the activated carbons can be backwash by the reverse water, so that most of the impurities are taken away and the absorption and filtration function restore.
When the activated carbon reaches the saturated absorption capacity and completely fails, the activated carbon should be regenerated or replaced to meet the engineering requirements.