How to deal with electroplating waste gas equipment?
- Liquid absorption method
Use the characteristics of chemical reaction between certain substances in odor and liquid medicine to remove certain odor components.
Scope of application: Applicable to the treatment of large-volume and high-medium concentration odor.
Advantages: It can treat certain odor components in a targeted manner, and the process is relatively mature.
Disadvantages: The purification efficiency is not high, the absorbent is consumed, and it is easy to form secondary pollution;
- Adsorption method
Use the adsorption function of the adsorbent to transfer the odorous substances from the gas phase to the solid phase.
Scope of application: Applicable to the treatment of low-concentration and high-purification requirements of odorous gases.
Advantages: The purification efficiency is very high, and multi-component odorous gases can be treated.
Disadvantages: Adsorbents are expensive, regeneration is difficult, and the odorous gas to be treated must have a lower temperature and dust content;
Three, washing activated sludge deodorization method
The odorous substances and the mixed liquid containing suspended mud are fully contacted to remove them from the odor in the absorber, and the washing liquid is then sent to the reactor to degrade the dissolved odorous substances through the metabolic activities of suspended microorganisms.
Scope of application: It has a large scope of application and can treat atmospheric odor.
Advantages: At the same time, the operating conditions are easy to control and the floor space is small.
Disadvantages: The equipment cost is high, the operation is complicated and nutrients need to be added;
Four, aeration activated sludge deodorization method
The odorous substances are dispersed in the mixed liquid containing activated sludge in the form of aeration, and the odorous substances are degraded by suspended microorganisms. The scope of application is wide.
Scope of application: Currently, Japan has used it for odor treatment in feces treatment sites and sewage treatment plants.
Advantages: After the activated sludge is domesticated, the removal rate of malodorous components that do not exceed the limit load can reach more than 99.5%.
Disadvantages: Due to the limitation of aeration intensity, the application of this method is still limited.