Views: 0 Author: Site Editor Publish Time: 2023-02-21 Origin: Site
Activated carbon regeneration is the process of removing the adsorbed material from the micro-pores of activated carbon by physical or chemical means without destroying its original structure, and restoring its adsorption properties. The following is an introduction to the regeneration methods of activated carbon.
Here is the content list：
l Traditional regeneration methods
l Emerging regeneration methods
1. Thermal regeneration method
Thermal regeneration is the most mature method for regenerating activated carbon. The regeneration process of activated carbon after treatment of organic wastewater is generally divided into three stages: drying, high-temperature carbonization, and activation, according to different temperatures when heated to a temperature of organic material.
The thermal regeneration method has a high regeneration efficiency, a short time, and a wide range of applications, but the carbon loss during the regeneration process is large, up to 5% to 10%. At the same time, the mechanical strength of the regenerated activated carbon decreases, the adsorption efficiency is also reduced, and the adsorption performance is lost after repeated regeneration.
2. Biological regeneration method
The use of microbial metabolism to oxidize and degrade the pollutants adsorbed on activated carbon is known as the biological regeneration method. The biological method has relatively low investment and operating costs, but the regeneration time is long and water quality and temperature have a significant impact on the regeneration effect. At the same time, microorganisms are highly selective in the treatment of pollutants.
3. Wet oxidation regeneration method
The wet oxidation regeneration method refers to high temperature and high-pressure conditions, the use of oxygen or air as an oxidant, will be in the liquid phase of the organic matter adsorption oxidation decomposition into small molecules of treatment method wet oxidation regeneration method is a relatively simple operation, the impact on the adsorption capacity is small, the carbon loss rate is low, usually suitable for processing high toxicity, biodegradable organic matter.
1. Microwave radiation regeneration method
The microwave radiation regeneration method is the principle of the thermal regeneration method and gradually developed the activated carbon regeneration method. Most of the adsorbents adsorbed by activated carbon are strongly polar substances, which have a stronger ability to absorb microwaves than activated carbon, and can therefore be regenerated by thermal desorption. The advantages are short heating time, high regeneration efficiency, and low energy consumption because the heating process is selective.
2. Supercritical fluid regeneration method
The advantages of supercritical fluids are high density, high solubility, high mass transfer rate, good diffusion performance, and low surface tension. The absorbed organics are very soluble in SCF solvents. By changing the temperature and pressure, the organic matter can be effectively separated from SCF to achieve the purpose of regeneration of activated carbon.
3. Electrochemical regeneration method
The electrochemical regeneration method is a new type of activated carbon regeneration method and has been very actively researched in recent years. Activated carbon under the action of electric field polarization, the anode in the end, the cathode at the other end, the formation of a micro electrolytic cell, and the reduction and oxidation reaction respectively. This method is simple to operate, highly efficient, has low energy consumption, and treats a relatively wide range of objects.
The above are the methods of regeneration of activated carbon. With the development of technology, I believe that in the future we can find more methods to make up for the shortcomings of traditional methods. If you need high-quality activated carbon, you can consider our cost-effective products.
