Carbon filtering
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The document discusses two types of carbon filters used in water filtration: carbon block filters and granular activated carbon filters. Both use activated carbon to adsorb contaminants via chemical adsorption and catalyst reduction. Carbon block filters are more efficient at contaminant removal due to the solid carbon block structure allowing longer water contact, while granular activated carbon filters can process higher water flow rates. Activated carbon filters are effective at removing chlorine, organics, and odor/taste from water sources.
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Carbon filtering
- 2. Uses a bed of activated carbon By chemical adsorption and catalyst reduction 2 types of carbon filters use in filtration industry : carbon block filter : granular activated filter
- 3. To adsorb chlorine, organics, tri-halo methane (THM), taste, odor and color charcoal that has been treated with oxygen Highly porous material Provide larger surface area
- 4. Adsorption process and catalyst reduction Contaminants attract and adsorb onto carbon surface Effeciency of adsorption influenced by the carbon characteristics and contaminants characteristics
- 5. Carbon block filter Granular activated filter Solid block of carbon Loose granular of carbon Allow water contact with carbon for longer period Less contact of water with granular activated carbon particle High efficiency Low efficiency Treated with silver (when saturated with contaminants) Treated with silver Low flowrate of water Allow higher flowrate of water
- 8. Efficient removal of chlorine, colour, organic matter and odour High surface area High efficiency of adsorption Easy to operate
- 9. Drinking water treatment River water treatment Ground water treatment Waste water treament plant