Phenolic resin wastewater treatment technology

1. business background:

As one of the three major synthetic thermosetting resins, phenolic resin has a history of more than 100 years and has been widely used as molding compounds, adhesives, coatings, foam plastics, inks, etc. The concentration of organic pollutants such as phenol, aldehyde, and alcohol in phenolic resin wastewater is very high, making it relatively difficult to treat.

2. Introduction to common phenolic resin wastewater treatment processes:

• Extraction method: Use special extraction agents to recover phenols in wastewater.
• Oxidation method: Commonly used oxidation methods include reagent oxidation, ozone oxidation, micro-electrolytic oxidation, strong electrolytic oxidation, photocatalytic oxidation, wet oxidation, ultrasonic/H 2 _O 2 _method , ClO ₂ oxidation method, etc.
• Adsorption method: Reduce the COD of phenolic wastewater through adsorption method
• Biochemical method: Utilize phenol and aldehyde as nutrients for microorganisms, and remove phenol and aldehyde from wastewater through the metabolic decomposition of the organism itself.

3. Introduction to our company’s phenolic resin wastewater treatment process:

Through a combination of technologies, our company first recovers phenols in the water, then removes formaldehyde from the water, and then undergoes biochemical treatment to reduce the phenols and aldehydes in the wastewater to the national emission standards.

4. Our company’s phenolic resin wastewater treatment indicators :

According to the latest standard requirements of the “Synthetic Resin Industrial Pollutant Emission Standard GB31572-2015”: the first-level emission standard for phenol content cannot exceed 0.3mg/l. The third-level emission standard cannot exceed 0.5mg/l; the first-level emission standard for formaldehyde content is the highest. It cannot exceed 1mg/l. The third-level emission standard cannot exceed 2mg/l.

5. Process flow block diagram:
6. Typical projects:

Suzhou *** Chemical Co., Ltd. specializes in the production of phenolic resin. The effluent phenol content is 7% and the formaldehyde content is 2%. After phenol recovery, the phenol content in the wastewater is reduced to less than 100 mg/l, and then the formaldehyde is cracked by the compound formaldehyde removal process. After oxidation pretreatment to improve the biodegradability of the wastewater, it enters the biochemical system. The phenol content in the biochemical effluent is 0.3mg/l, and the aldehyde content is reduced to 0.5mg/l.