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In columnar activated carbon industry, iodine adsorption value or carbon tetrachloride adsorption value (CTC) is usually used to calibrate the adsorption value of activated carbon. The higher the adsorption value, the stronger the adsorption capacity of activated carbon. In the production process, the only way to improve the adsorption performance of columnar activated carbon is to control the production process, so as to increase the pore structure of activated carbon per unit volume as much as possible. Therefore, the density of activated carbon with higher adsorption becomes smaller and smaller due to its large number of pores, which is why the better the adsorption of activated carbon is, the lighter the handle is (the premise is that the same raw material is used for production, and no water has been soaked or other substances have been adsorbed).

In the application of column activated carbon, it is better to use the actual column activated carbon, operation conditions and specific treatment materials to evaluate and test the adsorption capacity. The adsorption capacity of columnar activated carbon, that is, the amount of adsorbate adsorbed by a unit of columnar activated carbon, is also known as the activity of columnar activated carbon in industry

Static activity the amount of adsorption that is usually referred to as the equilibrium adsorption of an adsorbent.

Dynamic activity refers to the fluid mixture passing through the column activated carbon bed, in which the adsorbate is adsorbed. After some time of operation, some adsorbate appears in the fluid flowing out of the column activated carbon bed, which indicates that the column activated carbon bed loses the adsorption capacity. At this time, the amount of adsorbed adsorbate on the column activated carbon is called the activity of the columnar activated carbon. It is the data needed to design a large number of, regular and important adsorption systems. The standard practical method for determining the adsorption capacity of columnar activated carbon by liquid isotherm method can be used to determine the sorption capacity of original, reactivated and powdered activated carbon.

Some organic compounds in wastewater are difficult to be oxidized and decomposed by microorganism or general oxidation method, such as phenol, benzene, petroleum and its products, insecticides, detergents, synthetic dyes, amines and many synthetic organic compounds. After biochemical treatment, it is difficult to meet the discharge standards in water bodies with high discharge requirements, which also seriously affects the reuse of wastewater. Therefore, it needs to be further developed handle.

Due to its high adsorption capacity of organic matter, column activated carbon has been widely used in advanced wastewater treatment

1. Compact equipment and convenient management.

2. Granular carbon can be recycled and reused. The adsorbed organic matter is burned off in the regeneration process, and no sludge is produced.

3. It has a wide range of applications and is effective for most organic substances in wastewater, including those difficult to be degraded by microorganisms.

4. It has strong adaptability to the change of water quantity and organic matter load, and can obtain stable treatment effect.

5. High degree of treatment, the BOD and TOC can be reduced by 99% and 1-3mg / L respectively after the advanced treatment with column activated carbon.

6. Useful substances can be recovered, such as treating phenol wastewater with column activated carbon and recovering saturated column activated carbon with alkali to recover sodium phenolate.