Pyridine Wastewater Treatment Method

The treatment of pyridine wastewater is complex, with complex water quality and a large amount of heterocyclic non biodegradable substances. It has the characteristics of high COD concentration, high organic nitrogen content, and high toxicity. Conventional pyridine wastewater treatment technologies are difficult to treat, and pyridine wastewater treatment has become a difficult point in industrial wastewater treatment.

1. Pyridine wastewater treatment method:

In recent years, the physical methods used in industry to treat pyridine wastewater mainly include adsorption, distillation, and incineration. The advantages and disadvantages of each process are compared as follows:

By utilizing the special adsorption function of adsorbent materials, specific pollutants in wastewater can be adsorbed and recovered, thereby reducing the concentration of pollutants in wastewater.

Adsorption method is a very simple and direct wastewater treatment technology that can remove toxic pyridine and benzene from pyridine wastewater. The content of pyridine in the adsorbed water can reach the first level discharge standard of the "Wastewater Discharge Standards", improving the biodegradability of the wastewater.

Simultaneous adsorption method has strong adsorption capacity, easy regeneration, low operating cost, mature process technology, and has become an effective method for treating pyridine wastewater.

2. Introduction to Haipu customized pyridine wastewater treatment process:

Jiangsu Haipu Functional Materials Co., Ltd. is located in Suzhou Industrial Park. It is a national high-tech enterprise that uses special adsorbents and catalysts as its core technology, supporting the development of application processes, technical services, engineering implementation, etc., to solve related environmental problems for customers. The conventional process of treating wastewater by Haipu adsorption method is shown in the following figure.

Conventional process diagram for adsorption treatment of wastewater

When using Haipu's adsorption process to treat pyridine wastewater, the wastewater is pre filtered to remove suspended and particulate matter, and then enters the adsorption tower for adsorption. The special adsorption material filled in the adsorption tower can adsorb pyridine and benzene in the wastewater on the surface of the material, achieving the removal of toxic and difficult to grow substances.

After adsorption saturation, a specific desorption agent is used to desorb the adsorbent material, allowing it to regenerate. This process is continuously repeated, and the adsorbed water is used to remove pyridine and benzene wastewater, which can be directly treated in the biochemical system. The process flow of pyridine containing wastewater adsorption treatment is shown in the following figure.

Process flowchart

3. Introduction to Pyridine Wastewater Treatment Cases

This case study of pyridine wastewater treatment introduces a 350t/d pyridine containing wastewater treatment project of a chemical enterprise in Shandong. The company uses our adsorption process to treat the pyridine wastewater generated during its production process. The experiment proves that the pyridine content in the wastewater has decreased from 656mg/L to below 2mg/L, and the removal rate of pyridine in the wastewater is as high as 99% or more. The treated pyridine content is particularly low and can be directly sent to the biochemical system for further treatment. The wastewater after biochemical treatment can achieve water reuse and reduce the amount of water consumed in production. The "adsorption method+biochemistry" is used to treat pyridine wastewater, and the specific treatment data is shown in the following table:

Processing rendering, from left to right are raw water and adsorbed effluent, respectively

4. Advantages of Adsorption Method for Removing Pyridine Wastewater:

The use of adsorption method to treat pyridine wastewater can efficiently remove pyridine and benzene from the wastewater, ensuring that the pyridine and benzene content in the treated wastewater is below 2mg/L. Toxic and difficult to degrade substances in the wastewater are almost removed. Its advantages include:

(1) Efficiently remove pyridine and benzene from wastewater, while reducing COD and ammonia nitrogen content, with high removal efficiency. Strictly control the concentration of pyridine and benzene in the treated wastewater, with pyridine and benzene content below 2mg/L;

(2) Greatly reducing the cost of wastewater treatment for enterprises, the treatment cost of adsorption method is much lower than that of incineration treatment+1000 yuan/ton;

(3) Conduct experiments on waste acid sampling samples generated on-site by enterprises, based on technology and experiments to design adsorption processes with high compatibility between wastewater and processes;

(4) The equipment occupies less land, has a compact structure, requires less investment in civil engineering and equipment, uses desorption agents multiple times and gradually concentrates them, has a high utilization rate of chemicals, and has low operating costs;

(5) It can be implemented in module component form, flexibly adjusted according to production capacity, and easy to install;

(6) Advanced and mature technology, no secondary pollution, strong technical support, and rich engineering application experience.