A polymerization separation sewage treatment process based on carbon-based materials

Abstract

The application discloses a kind of polymerization separation sewage treatment processes based on carbon-based material, suitable for the purification and reuse of synthetic rubber industrial wastewater.The process includes steps such as adsorption enrichment polymerization, microfiltration membrane treatment, flocculation separation and biochemical treatment in sequence, and can efficiently remove COD, ammonia nitrogen, total phosphorus, total nitrogen and suspended impurities in wastewater.The experimental results show that the COD after treatment is reduced to 36 mg / L, the removal rate is 95.5%, the ammonia nitrogen removal rate is 99.4%, and the treatment efficiency of wastewater and the reuse value of water resources are significantly improved.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to a polymerization separation wastewater treatment process based on carbon-based materials, which is suitable for the efficient purification and reuse of rubber industry wastewater. Background Technology

[0002] With the rapid development of the national economy and the continuous growth of the population, rubber plays an increasingly important role in meeting various needs in our daily lives. Along with the high demand and rapid development of the rubber industry, it cannot be ignored that the rubber industry is a high-water-consuming sector. The production and preparation process of rubber generates a large amount of organic wastewater. Due to the complex composition of this wastewater, it is difficult to treat. How to effectively treat and dispose of this wastewater, while simultaneously achieving resource utilization, protecting the environment, reducing enterprise operating costs, and realizing sustainable development, has always been a challenging and pressing issue for the industry.

[0003] Rubber wastewater is prone to polymerization, making it difficult to treat using traditional methods. Even when conventional wastewater treatment methods achieve compliance with discharge standards, the presence of carbon-carbon double bond macromolecules in the wastewater leads to further polymerization during reuse. This can cause pipe blockages, increased heat exchanger thermal resistance, and even render the wastewater treatment equipment unusable. Therefore, the current state of rubber wastewater treatment is ineffective and fails to meet reuse standards.

[0004] Based on this, the present invention designs a carbon-based material polymerization and separation wastewater treatment process to solve the above problems. Summary of the Invention

[0005] In view of the shortcomings of existing technologies, the present invention provides a carbon-based material polymerization and separation wastewater treatment process.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A carbon-based material polymerization and separation wastewater treatment process includes the following steps:

[0008] 1. Wastewater from the synthetic rubber production workshop is discharged into a collection tank;

[0009] 2. The wastewater is transported to reaction tank 1.

[0010] 3. Add carbon-based materials to reaction tank 1 to carry out flocculation, adsorption and polymerization reaction;

[0011] IV. The sewage is separated by sedimentation in the sedimentation tank. The separated turbid liquid is transported to the wastewater tank, and the supernatant sewage is transported to the buffer tank.

[0012] 5. Add hydrogen peroxide, ferrous sulfate and dilute sulfuric acid to reaction tank 2 to obtain Fenton mixture, and transport it together with the supernatant wastewater in buffer tank to Fenton reactor;

[0013] 6. Add flocculant and neutralizing agent to the Fenton reactor and transport them to reaction tank 3 for flocculation and neutralization;

[0014] 7. The wastewater in reaction tank 3 is transported to the secondary sedimentation tank for secondary sedimentation. The turbid liquid separated in the secondary sedimentation tank is transported to the wastewater tank and transported together with the turbid liquid from step 3 to the glue collection port. The water quality of the supernatant is tested to see if it meets the standards. If it does, it enters the product water tank for reuse.

[0015] Furthermore, in step one, the pH in the collection tank is adjusted to 7.

[0016] Furthermore, in step three, the selected carbon-based material can be used until it fails.

[0017] Furthermore, in step five, the Fenton mixture refers to a system composed of hydrogen peroxide and ferrous ions, which has strong oxidizing properties, second only to fluorine.

[0018] Furthermore, in step five, the reaction time in the Fenton reactor is...

[0019] Furthermore, in step five, the reaction in the Fenton reactor is carried out at room temperature.

[0020] Furthermore, in step five, the pH value in the Fenton reactor is controlled at 2-4.

[0021] Furthermore, in step six, the flocculant added to the Fenton reactor is a high molecular weight polymer of polyacrylamide.

[0022] Furthermore, in step six, the flocculant added to the Fenton reactor can flocculate most of the solids and some macromolecular substances in the wastewater, and can also adjust the pH value of the wastewater, which is beneficial to the growth of microorganisms in subsequent treatment.

[0023] Furthermore, in step six, the neutralizing agent added to the Fenton reactor is...

[0024] Furthermore, in step seven, if the water quality of the supernatant fails the test, it is transferred to a buffer tank for further processing.

[0025] Beneficial effects

[0026] This invention can effectively treat wastewater generated during rubber production. It has significant effects on the treatment of COD, ammonia nitrogen, total phosphorus, total nitrogen and sludge impurities in wastewater. Specifically, the COD content is reduced to 36 mg / L with a removal rate of 95.5%, and the ammonia nitrogen removal rate is 99.4%. Attached Figure Description

[0027] Figure 1 This is a flow chart of a carbon-based material polymerization and separation wastewater treatment process according to the present invention.

Claims

1. A polymerization separation wastewater treatment process based on carbon-based materials, characterized in that, Includes the following steps: (1) Discharge the wastewater from the synthetic rubber production workshop into the collection tank; (2) The wastewater is transported to the first reaction tank; (3) Add carbon-based materials to the first reaction tank to carry out flocculation, adsorption and polymerization reaction; (4) The wastewater after the reaction is sent to the sedimentation tank for initial sedimentation and separation. The separated turbid liquid is sent to the wastewater tank and the supernatant is sent to the buffer tank. (5) Add hydrogen peroxide, ferrous sulfate and dilute sulfuric acid to the second reaction tank to form Fenton mixture, and then mix it with the supernatant in the buffer tank and send it into the Fenton reactor. (6) Add flocculant and neutralizer to the Fenton reactor, and send the mixture into the third reaction tank for flocculation and neutralization treatment; (7) The treatment liquid in the third reaction tank is transported to the secondary sedimentation tank for secondary sedimentation. The separated turbid liquid is sent to the wastewater tank. The supernatant is reused in the product water tank after passing the water quality test. If it fails the test, it is returned to the buffer tank for further treatment.

2. The process according to claim 1, characterized in that: In step (1), the pH value of the wastewater in the collection tank is adjusted to maintain it in the range of 6-8.

3. The process according to claim 1, characterized in that: The carbon-based material used in step (3) can be used continuously until its adsorption capacity fails and it is replaced.

4. The process according to claim 1, characterized in that: The Fenton mixture mentioned in step (5) is a strong oxidizing system composed of hydrogen peroxide and ferrous ions.

5. The process according to claim 1, characterized in that: The Fenton reaction is carried out at room temperature, and the pH value of the reaction is controlled between 2 and 4.

6. The process according to claim 1, characterized in that: The flocculant used in step (6) is a polyacrylamide polymer material.

7. The process according to claim 1, characterized in that: The neutralizing agent is an alkaline substance that can adjust the pH.

8. The process according to claim 1, characterized in that: In step (7), if the supernatant fails the test, it is returned to the buffer tank for repeated treatment until the water quality meets the standards.

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