Carbon Filter System – Key Process in Pre-Filter System

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.

Several different sizes of carbon filter tanks and a carbon filter process.

Structures

Filter Tank. Our FRP tanks (including universal FRP tanks and FRP tanks with upper loading and lower discharge port) are popular during multimedia filter system. Stainless steel tanks are available.
Media. This system uses activated carbon, which can remove odors and chlorine in the water.
Water distributors. Upper and bottom distributors with different types can suit almost all flows and tank sizes.
Multiport control valves. This device can reduce your pipeline placement and make the system stable and smart running. Manual and automatic valves options are provided.

Benefits

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

Chlorine.
Color
Odor
taste
Organics
Colloid
Pigment
Heavy metal ions

Water Quality

Reduce COD value.
Reduce SDI value. SDI < 5
Reduce TOC value. TOC < 2.0 ppm
Total residual chlorine < 0.1 ppm

Working Principle

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.

The filter process and backwash process of carbon filter system.

Applications

Sewage Treatment Plant. Activated carbon filter system can remove organic compounds, harmful chemicals, odors and other impurities in industrial wastewater.
Air Purification. Activated carbon filters can help to remove smokes, odors and other volatile pollutants in air and gas purification and will not result in outgassing.
Analytical chemistry. Purify organic molecules and chemicals by removing turbidity.
Metal finishing. Purify organic molecules and chemicals by removing turbidity.
Groundwater remediation. Purify organic molecules and chemicals by removing turbidity.
Pharmaceutical and chemical industry. activated carbon filters act as a suitable carrier for precious metals and other catalyst applications.
Drinking Water Treatment. Activated carbon filter offers better results than sand filters in removing worrisome compounds (chlorine, heavy metals, byproducts, and other volatile microorganisms) in municipal water.
Distilled Beverages Purification. Activated carbon filters can help to filter organic components, including tastes, odor and colors of beverage for better texture and fermentation in juices and fruit-based beverages.

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