What is the function of the activated carbon canister?

Many people may not know what an activated carbon canister is. In fact, it is just a small canister filled with activated carbon, so it is called an activated carbon canister. These activated carbons are made by burning high-quality wood chips. As we all know, charcoal has the function of absorbing water and adsorbing, which makes the activated carbon canister have the following many uses.

The function of activated carbon canister:

The adsorption principle of activated carbon canister is: a layer of balanced surface particle concentration is formed on the surface, and organic impurities are adsorbed on the activated carbon particles, using a high initial adsorption effect. However, as time goes by, the adsorption capacity of activated carbon will decrease to varying degrees, and the adsorption effect will also decrease. If the water in the towerless water supply tank is turbid and has a high organic content, the activated carbon filter will quickly lose its function. Therefore, activated carbon should be cleaned or replaced regularly.

The size of activated carbon particles in activated carbon canisters also affects the adsorption capacity. Generally speaking, the smaller the activated carbon particles, the larger the filtration area. Therefore, powdered activated carbon has the largest total area and the best adsorption effect, but powdered activated carbon can easily flow into the aquarium with water, making it difficult to control and rarely used. Granular activated carbon is not easy to flow due to its granular shape, and impurities such as organic matter in the water are not easy to be blocked in the activated carbon filter layer. It has strong adsorption capacity and is easy to carry and replace.

Function: In the water quality pretreatment system, the activated carbon tank can absorb the residual chlorine that cannot be removed in the previous stage filtration to prevent the subsequent reverse osmosis membrane from being oxidized and degraded. At the same time, it also absorbs small molecular organic matter and other pollutants leaked from the previous stage, and has a more obvious adsorption and removal effect on odor, colloids and pigments, heavy metal ions, COD, etc. in water. The SDI value of RO influent can be further reduced to ensure SDI < 5 and TOC < 2.0 ppm.

The activated carbon canister does its job by working through a bed of carbon. The activated carbon granule bed of the carbon bed has so many micropores and huge specific surface area and strong physical adsorption capacity. The water passes through the activated carbon effectively to adsorb the organic pollutants in the water. The crystals on the surface of activated carbon can also absorb some oxygen, and organic pollutants from the water layer are adsorbed by the activated carbon.