A Brief Discussion on the Four Major VOC Adsorbent Waste Gas Treatment Technologies

After SO2, NOX, and Freon, volatile gas VOC emissions have become a focus of global environmental concern. Currently, the most common VOC adsorbent is used to treat and eliminate VOC waste gas. There are four major technologies for treating VOC waste gas, as follows:

1. Thermal destruction method is a method of directly burning VOC exhaust gas to reduce its concentration and make it no longer hazardous. Direct flame combustion has a higher efficiency in treating organic waste gases. Catalytic combustion accelerates the chemical reaction rate under the action of the catalytic layer. This method is less commonly used than direct combustion and is the preferred choice for handling high concentrations and low flow rates.

2. Adsorption method is mainly suitable for low concentration and high content organic waste gas. The adsorption method for treating VOC waste gas has a low consumption capacity, but the purification efficiency is very high, and it can effectively purify harmful gases. This treatment method is worth promoting vigorously. But there are also some drawbacks, which are that it can easily lead to worker poisoning, so this method mainly relies on adsorbents. Use activated carbon more often because it has strong adsorption properties.

3. In terms of basic principles, biological treatment is used to treat VOC waste gas, which is a harmless treatment method. A complete processing procedure includes three steps: 1) Contact with water to dissolve it; 2) Dissolve in liquid film and then be absorbed by microorganisms attached to biofilm; 3) The VOC waste gas absorbed by microorganisms is ultimately degraded and converted into harmless substances during physiological metabolism.

4. Oxidation method is the most suitable way to treat VOC waste gas, which can accelerate the reaction rate by heating and using catalysts. The method of catalytic oxidation can use both precious metal catalysts and non precious metal catalysts.