With the rapid development of industrialization, a large amount of wastewater contains animal and vegetable oils, which has a serious impact on the environment and ecosystem. Therefore, the effective removal of animal and vegetable oils from wastewater has become an important environmental protection task.
1.Chemical oxidation.
Chemical oxidation is a method of oxidizing and decomposing organic components in animal and vegetable oils into harmless substances by adding oxidants. Commonly used oxidants include ozone, hydrogen peroxide, etc. The advantage of chemical oxidation is that it has high treatment efficiency and is suitable for treating a large amount of wastewater containing animal and vegetable oils. However, this method requires the use of a large number of chemical reagents, which is prone to secondary contamination.
2.Physical adsorption method.
Physical adsorption method is a method that uses the adsorption effect of adsorbents to adsorb animal and vegetable oils in wastewater on the surface of adsorbents, so as to achieve separation. Commonly used adsorbents include activated carbon, bentonite, etc. The advantage of the physical adsorption method is that it does not require the use of chemical reagents and does not produce secondary pollution. However, this method requires the use of a large number of adsorbents, and the regeneration and regeneration of adsorbents is difficult.
3.Biological treatment.
Biological treatment is a method that uses the metabolism of microorganisms to decompose animal and vegetable oils in wastewater into harmless substances. The advantage of the biological treatment method is that the treatment efficiency is high and there is no secondary pollution. However, this method requires a long treatment time and requires high conditions such as pH value and temperature of wastewater.