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Activated Carbon Filter Manufacturer: Providing You with Knowledge and Information About Activated Carbon Filters
Release Date:
2022-05-27
Introduction to the role of activated carbon filters in water treatment systems: Activated carbon filters are a commonly used piece of water treatment equipment. As a pre-treatment step in desalination systems, they can adsorb residual chlorine that cannot be removed by the preceding filtration stage, thereby effectively extending the service life of downstream equipment, improving effluent water quality, and preventing contamination—particularly free-radical oxygen-induced poisoning of downstream reverse osmosis membranes and ion-exchange resins. In addition, these filters adsorb trace organic compounds and other contaminants that may have leaked from the previous stage, exhibiting significant removal efficiency for odors, colloids, colorants, heavy-metal ions, and other impurities in the water, while also reducing COD levels.
Introduction to the role of activated carbon filters in water treatment systems: Activated carbon filters are a commonly used piece of water treatment equipment. As a pre-treatment step in desalination systems, they can adsorb residual chlorine that cannot be removed by the preceding filtration stage, thereby effectively extending the service life of downstream equipment, improving effluent water quality, and preventing contamination—particularly free-radical oxygen-induced poisoning of downstream reverse osmosis membranes and ion-exchange resins. In addition, these filters adsorb trace organic compounds and other contaminants that may have leaked from the previous stage, exhibiting significant adsorption and removal performance for odors, colloids, colorants, heavy-metal ions, and other impurities in the water, while also helping to reduce COD levels.
Activated carbon filters can remove discolored and odorous impurities as well as heavy metals such as mercury, lead, cadmium, zinc, iron, manganese, and chromium from potable water. They also effectively eliminate high-molecular-weight compounds like arsenic, hydrides, sulfides, and residual chlorine, as well as radioactive substances such as strontium and radium. Furthermore, these filters can remove and inactivate bacteria, including Escherichia coli, which are known carcinogens. As a result, activated carbon filters are an ideal water purification solution for industries such as drinking water production, food processing, beverage manufacturing, pharmaceuticals, and chemicals. With their simple design and ease of operation and maintenance, they are well suited for enterprises and institutions in the food, beverage, and chemical sectors that have stringent water-quality requirements. They can also be deployed in hotels, military facilities, railway stations, and ports as water-supply equipment for both industrial and domestic use.
The filter media in an activated carbon filter adsorber may be packed with quartz sand to a bed depth of 0.15–0.4 meters. As a support layer, the quartz sand particles can range from 20 to 40 millimeters in size, while the filter layer, composed of granular activated carbon, can be packed to a height of 1.0–1.5 meters. The overall packing thickness is typically 1,000–2,000 millimeters.
Prior to loading the activated carbon filter, the solution stability of the quartz sand at the bottom of the filtration media shall be tested. After 24 hours of soaking, the following criteria must be met: the increase in total dissolved solids shall not exceed 20 mg/L; the increase in chemical oxygen demand shall not exceed 10 mg/L; and, after soaking in an alkaline medium, the increase in silica shall not exceed 10 mg/L.
After the quartz sand for the activated carbon filter is placed in the equipment, it should be thoroughly rinsed. The water flow should be directed from top to bottom, with the dirty water discharged from bottom to top, until the effluent becomes clear. Subsequently, the granular activated carbon media should be loaded and rinsed again, with the water flow directed from bottom to top and the dirty water discharged from top to bottom. The primary factors influencing the adsorption performance and service life of an activated carbon filter include the type and concentration of contaminants, the residence time of the air stream within the media, and the temperature and humidity of the air.
Keywords:
Activated carbon filter
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