A zero-discharge treatment process for cephem pharmaceutical wastewater

Abstract

This invention relates to the field of pharmaceutical wastewater treatment technology and discloses a zero-discharge treatment process for cephalosporin pharmaceutical wastewater, comprising the following steps: S1: pretreatment of high-concentration, high-salt wastewater generated from cephalosporin pharmaceutical production; S2: ultra-high temperature oxidation treatment of the pretreated wastewater to oxidize recalcitrant organic pollutants in the wastewater through chemical reactions; S3: salt recovery and resource utilization of the oxidized mixture. The zero-discharge treatment process for cephalosporin pharmaceutical wastewater proposed in this invention combines ultra-high temperature oxidation and ambient temperature oxidation, which can efficiently degrade complex carbon-, nitrogen-, and phosphorus-containing organic matter in cephalosporin wastewater, adapt to the fluctuations in the composition of different batches of wastewater, and the brine obtained after treatment can be used in cephalosporin pharmaceutical processes and other industrial production activities after special treatment, achieving the goals of maximizing resource utilization and environmental protection.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical wastewater treatment technology, and in particular to a zero-discharge treatment process for cephalosporin pharmaceutical wastewater. Background Technology

[0002] Cephalosporin antibiotics are a class of broad-spectrum β-lactam antibiotics widely used to treat a variety of infections caused by Gram-positive and Gram-negative bacteria. They exert their antibacterial effects by inhibiting bacterial cell wall synthesis. Cephalosporin antibiotics are classified into several generations based on their chemical structure and antibacterial spectrum.

[0003] Existing technologies face numerous challenges and shortcomings in treating cephalosporin pharmaceutical wastewater, specifically in the following aspects:

[0004] 1. High salt content hinders biochemical treatment: Cephalosporin wastewater contains extremely high levels of salt such as sodium chloride and sodium sulfate, which seriously affects the activity and living environment of microorganisms, making traditional biochemical treatment processes almost ineffective. High salinity not only inhibits the metabolic activities of microorganisms, but may also corrode treatment equipment, increasing maintenance costs.

[0005] 2. Complex organic composition and large fluctuations: The organic composition of this type of wastewater is extremely complex and fluctuates greatly. In addition to carbon-containing organic matter, it also contains a large number of nitrogen- and phosphorus-containing compounds. This diversity makes it difficult to deal with a single treatment method. Multiple technical means are required to achieve the ideal treatment effect. In addition, the wastewater composition varies significantly between different production batches, which further increases the difficulty of treatment.

[0006] 3. High difficulty in degrading organic matter: Cephalosporin drugs and their synthetic intermediates and by-products are difficult-to-degrade organic matter. Conventional oxidation technologies such as ozone oxidation and Fenton's reagent have low removal efficiency and are difficult to completely decompose these substances. This not only affects the treatment effect, but may also lead to residual antibiotics and other harmful substances in the environment, increasing ecological risks.

[0007] 4. Lack of unified standards and poor process adaptability: Since cephalosporin wastewater is not a final product, its discharge standards are unclear. Different companies develop different treatment plans based on their own circumstances. Moreover, changes in production processes can lead to drastically different wastewater pollutant compositions, and the quality of wastewater from the same product produced by different companies can vary significantly. This uncertainty poses a great challenge to wastewater treatment, requiring treatment processes to be highly flexible and adaptable.

[0008] 5. Evaporation has limited effect on volume reduction and is difficult to operate: Although evaporation is a commonly used method for concentration and volume reduction, for high-concentration organic matter and high-salinity cephalosporin wastewater, evaporation equipment is prone to clogging and unstable operation. In addition, the hazardous waste generated during the evaporation process has complex components and high treatment costs, which limits its widespread application.

[0009] 6. High energy consumption and operating costs: Currently, most cephalosporin wastewater treatment relies on outsourced hazardous waste treatment or incineration. Although these two methods can effectively reduce pollutants, they consume a lot of energy and have huge operating costs. In particular, for small and medium-sized enterprises, the high treatment costs have become a heavy burden, affecting the sustainable development of enterprises.

[0010] In conclusion, existing treatment technologies are inadequate for handling cephalosporin pharmaceutical wastewater, and there is an urgent need to develop more efficient, economical, and environmentally friendly new technologies and processes to meet increasingly stringent environmental requirements and maximize resource utilization. Summary of the Invention

[0011] The purpose of this invention is to address the shortcomings of existing technologies by proposing a zero-discharge treatment process for cephalosporin pharmaceutical wastewater.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] A zero-discharge treatment process for cephalosporin pharmaceutical wastewater includes the following steps:

[0014] S1: Pretreatment of high-concentration, high-salt wastewater generated from cephalosporin pharmaceutical manufacturing;

[0015] S2: The pretreated wastewater is subjected to ultra-high-speed oxidation treatment to oxidize the organic pollutants in the wastewater that are difficult to degrade through chemical reaction;

[0016] S3: Salt recovery and resource utilization of the mixture after oxidation treatment.

[0017] As a preferred embodiment of the present invention, the pretreatment includes: a filtration stage: using a filter to remove large particulate solid suspended matter to prevent clogging of subsequent equipment; pH adjustment: adjusting the acidity or alkalinity of the wastewater according to the requirements of subsequent treatment to ensure a suitable chemical reaction environment; and water homogenization: stirring the wastewater with a stirrer to reduce the impact of water quality fluctuations on subsequent treatment units.

[0018] As a preferred embodiment of the present invention, in step S2, the ultra-high temperature oxidation treatment includes: ultra-high temperature oxidation treatment: the wastewater is introduced into an ultra-high temperature oxidation reactor to perform deep oxidation treatment on the wastewater, decomposing complex and difficult-to-degrade organic compounds; and room temperature oxidation treatment: the wastewater after ultra-high temperature oxidation treatment is introduced into a room temperature oxidation reactor, and ozone is introduced to effectively degrade the remaining difficult-to-degrade organic matter by utilizing the strong oxidizing properties of ozone, thereby improving the quality of the effluent.

[0019] As a preferred embodiment of the present invention, in the superheated oxidation treatment, the internal temperature of the reactor is set to 150-280℃, the pressure is set to 3-8MPa, and the residence time is set to 30-100min.

[0020] As a preferred embodiment of the present invention, a heat recovery system is provided between the ultra-high temperature oxidation treatment and the normal temperature oxidation treatment to recover and utilize the heat energy in the fluid after the ultra-high temperature oxidation treatment.

[0021] As a preferred embodiment of the present invention, membrane coupling technology is incorporated into the room temperature oxidation treatment to improve the utilization rate of hydroxyl radicals through membrane coupling.

[0022] As a preferred technical solution of the present invention, in step S1, salt recovery and resource utilization includes: high-purity salt: processing and refining the oxidized liquid to obtain high-purity salt, and applying the high-purity salt to the preparation process of cephalosporin drugs; brine: adjusting the concentration and component ratio parameters of the brine according to the needs of cephalosporin drug production to meet the requirements of the production process; by-product salt: classifying and quality testing the extracted salt to distinguish between high-purity salt and by-product salt, and applying the by-product salt to the industrial production field.

[0023] As a preferred technical solution of the present invention, a preheating treatment stage is set before step S2. In the preheating treatment stage, wastewater is introduced into a preheater to raise the temperature, and after preheating, it is introduced into the superheated oxidation treatment stage.

[0024] As a preferred embodiment of the present invention, in the preheating stage, the heat source of the preheater is the heat energy in the fluid after the superheated oxidation treatment.

[0025] The present invention has the following beneficial effects:

[0026] 1. Highly efficient removal of high salinity, overcoming the limitations of biochemical treatment: It adopts deep oxidation under high temperature and high pressure as well as room temperature oxidation treatment, which can effectively decompose complex and difficult-to-degrade organic compounds, unaffected by high salinity, and solves the problem that traditional biochemical treatment cannot deal with high salinity wastewater.

[0027] 2. To cope with complex and variable organic composition: By combining superheated oxidation and room temperature oxidation, and utilizing a variety of strong oxidation methods, it can efficiently degrade complex carbon-, nitrogen-, and phosphorus-containing organic matter in cephalosporin wastewater, and adapt to the fluctuation of wastewater composition in different batches;

[0028] 3. Membrane coupling technology: Incorporating membrane coupling technology into room temperature oxidation improves the efficiency of the oxidation reaction, further removes small molecule organic matter and dissolved salts, and ensures that the effluent water quality is stable and meets the standards.

[0029] 4. Reduce energy consumption and operating costs: A heat recovery system is set up between the superheated oxidation and normal temperature oxidation to recover and utilize the waste heat from high-temperature carbon dioxide and other fluids, which not only reduces the energy consumption of the entire plant, but also improves resource utilization.

[0030] 5. Improve reaction efficiency: The oxygen is preheated by a double-layer tube heater and the wastewater is preheated by a preheater. This reduces the initial heating energy required by the reactor itself, further reducing the overall energy consumption and extending the service life of the equipment. At the same time, the heat used for preheating comes from the overheating treatment stage, which realizes the effective utilization of waste heat and reduces the cost of wastewater treatment.

[0031] 6. Significant environmental benefits: The wastewater from cephalosporin pharmaceuticals is treated to obtain brine. After special treatment, a portion of the brine, either high-purity salt or brine under specific conditions, can be used in the production of cephalosporin pharmaceuticals, while another portion of the by-product salt can be used in other industrial production, thus achieving the goals of maximizing resource utilization and protecting the environment. Attached Figure Description

[0032] Figure 1 This is a flowchart of a zero-discharge treatment process for cephalosporin pharmaceutical wastewater proposed in this invention;

[0033] Figure 2 This is a schematic diagram of the overtemperature oxidation section and the room temperature oxidation section. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Reference Figure 1 and Figure 2 A zero-discharge treatment process for cephalosporin pharmaceutical wastewater includes the following steps:

[0036] S1: Pretreatment of high-concentration, high-salt wastewater generated from cephalosporin pharmaceutical manufacturing;

[0037] S2: The pretreated wastewater is subjected to ultra-high-speed oxidation treatment to oxidize the organic pollutants in the wastewater that are difficult to degrade through chemical reaction;

[0038] S3: Salt recovery and resource utilization of the mixture obtained after oxidation treatment.

[0039] The preprocessing includes:

[0040] Filtration stage: Use filters to remove large particulate solids to prevent clogging of subsequent equipment;

[0041] pH adjustment: Adjust the acidity or alkalinity of the wastewater according to the requirements of subsequent treatment to ensure a suitable chemical reaction environment;

[0042] Water quality homogenization: Wastewater is agitated using a mixer to stabilize its quality and reduce the impact of fluctuations on subsequent treatment units. This helps maintain stable system operation and avoids affecting treatment efficiency due to sudden changes in water quality.

[0043] Pretreatment agent addition: Demulsifier addition. If the wastewater contains emulsified oil or other substances that are difficult to separate, an appropriate amount of demulsifier can be added to break the emulsion state and facilitate subsequent separation. Flocculation and sedimentation: Adding flocculants promotes the aggregation of fine particles into larger particles, which are easier to settle or filter. Commonly used flocculants include polyaluminum chloride (PAC) and polyacrylamide (PAM).

[0044] Extraordinary oxidation treatment includes:

[0045] Superheated oxidation treatment: Wastewater is fed into a superheated oxidation reactor for deep oxidation treatment, decomposing complex and difficult-to-degrade organic compounds. The organic matter in the wastewater undergoes a vigorous oxidation reaction with oxygen under high temperature and pressure conditions, achieving effective wastewater treatment. During the superheated oxidation stage, the internal temperature of the reactor is set at 150-280℃. Considering the complexity and recalcitrant nature of cephalosporin wastewater, a higher temperature promotes more thorough decomposition of organic matter. The pressure is set at 3-8 MPa, ensuring sufficient safety while maintaining efficient oxidation reaction conditions. The residence time is set at 30-100 min. The air supply is determined based on the theoretical oxygen demand (ThOD) of the organic matter in the wastewater, ensuring sufficient oxygen to support complete oxidation while avoiding excessive oxygen supply and resource waste.

[0046] Furthermore, after the superheated oxidation treatment, the cephalosporin pharmaceutical wastewater is separated into carbon dioxide and other fluids at a high temperature. The high-temperature carbon dioxide is directly introduced into other equipment in the factory that requires heating for heat energy utilization. A heat recovery system is set up between the superheated oxidation and normal temperature oxidation stages to recover and utilize the heat energy in other fluids under superheated conditions. This design achieves effective reuse of waste heat and reduces the energy consumption of the entire factory. Furthermore, the heat recovery system includes a heat exchanger and a control system. The control system includes components such as temperature sensors, flow meters, and automatic regulating valves to monitor and control the entire heat recovery process, ensuring safe and efficient operation.

[0047] Furthermore, a preheater is installed before the superheated oxidation treatment stage to preheat the wastewater before it enters the superheated oxidation stage. The heat source for the preheater comes from the waste heat of the superheated stage. Specifically, high-temperature gas recovery: high-temperature carbon dioxide gas discharged from the superheated oxidation reactor is transported through pipelines to one side of the preheater to heat the wastewater inside the preheater; wastewater waste heat recovery: heat is extracted from the wastewater after superheated oxidation through a heat exchanger and transferred to the wastewater about to enter the superheated oxidation stage. This fully utilizes the heat energy generated in the superheated oxidation stage, achieving high resource utilization. This design can improve the reaction rate: preheating ensures that the wastewater is already at a high temperature when it enters the reactor, which helps to accelerate the oxidation and decomposition of organic matter and shorten the reaction time; reduce energy consumption: since the wastewater has already reached a high temperature in the preheating stage, the initial heating energy required by the reactor itself is reduced, thus reducing overall energy consumption; improve reaction conditions: preheating helps ensure that the wastewater enters the reactor at a relatively constant temperature, avoiding the adverse effects of temperature fluctuations and maintaining the stability of reaction conditions; protect equipment: prevent temperature shocks, reduce the impact of internal thermal stress on the equipment, and extend the service life of the equipment.

[0048] Furthermore, in the superheated oxidation stage, a heater is installed between the oxygen supply pipe and the superheated oxidation reactor. Specifically, this heater is a double-tube heater, which consists of an inner tube, an outer tube, and an insulation layer. The inner tube is used to supply oxygen to be preheated. One end of the inner tube is connected to the oxygen supply source, and the other end is directly connected to the superheated oxidation reactor. The outer tube wraps around the inner tube, and a medium carrying the heat generated in the superheated oxidation stage is passed between the outer and inner tubes. The insulation layer is wrapped around the outside of the outer tube. Commonly used insulation materials include rock wool and aluminum silicate fiber to reduce heat loss. The double-tube heater adopts a spiral structure to extend its heating time for oxygen and improve overall energy efficiency. Furthermore, a counter-current arrangement is adopted, that is, oxygen flows in from one end, while the heat exchange medium flows in from the other end, with the two flowing in opposite directions to ensure sufficient heat transfer. In this design, preheating ensures that oxygen enters the reactor at a higher temperature, which helps accelerate the oxidative decomposition of organic matter and shortens the reaction time. Secondly, the higher initial temperature can promote the generation of more free radicals, thereby more thoroughly oxidizing recalcitrant organic matter and ensuring the uniformity and thoroughness of the reaction.

[0049] Ambient temperature oxidation treatment: Wastewater treated by ultra-high temperature oxidation is passed into an ambient temperature oxidation reactor, and ozone is introduced. The strong oxidizing properties of ozone can effectively degrade the remaining recalcitrant organic matter, improving the quality of the effluent. This includes the following steps:

[0050] Pretreatment and conditioning: Before introducing the wastewater after superheated oxidation into the ambient temperature oxidation stage, it usually needs to undergo certain pretreatment and conditioning, specifically: pH adjustment, depending on the requirements of the subsequent oxidation reaction, the pH of the wastewater may need to be adjusted to a suitable range to optimize the ozone oxidation effect. Generally, a neutral or slightly alkaline environment is more favorable; temperature control, to ensure that the wastewater temperature is moderate and avoid excessively high or low temperatures affecting the solubility of ozone and reaction efficiency.

[0051] Ozone generators produce ozone: Ozone generators convert air or oxygen into ozone gas. Specifically, ozone generators use methods such as corona discharge and ultraviolet irradiation to generate high concentrations of ozone gas, and the generated ozone is then sent into the reaction system.

[0052] Ozone introduction and mixing: Ozone gas is introduced into the reaction vessel containing wastewater and ensured to be fully mixed. Specifically, a gas-liquid contact tower or other type of gas-liquid mixing device is used to ensure that the ozone gas and wastewater are in full contact. Commonly used devices include aeration tanks, packed towers, and Venturi tubes. Furthermore, microporous aeration heads are used to evenly disperse the ozone gas into the wastewater, increasing the surface area of ​​the bubbles and promoting the dissolution and reaction of ozone.

[0053] Oxidation reaction: Under normal temperature conditions, ozone reacts with organic pollutants in wastewater to produce carbon dioxide, water and other harmless substances. Ozone has a strong oxidizing ability and can rapidly decompose a variety of organic compounds in a short time. Compared with other chemical oxidants, the main byproduct of ozone reaction is oxygen, which is environmentally friendly. This design can thoroughly remove residual organic pollutants in wastewater after overheating treatment.

[0054] Exhaust gas treatment: Unreacted ozone and other volatile gases need to be treated before being emitted. Specifically, exhaust gas destruction devices, such as ultraviolet lamps and heated catalytic beds, are installed to decompose unreacted ozone into oxygen. During the treatment process using heated catalytic beds, the heat energy used to heat the catalyst is the waste heat generated in the superheated oxidation stage. Furthermore, the oxygen decomposed from the ozone produced in this stage is passed into the superheated oxidation stage, which can improve energy utilization and reduce wastewater treatment costs.

[0055] Furthermore, carbon dioxide is generated in both the superheated oxidation stage and the ambient temperature oxidation stage. Carbon capture technology is used to separate the carbon dioxide from the waste gas stream. The captured carbon dioxide can be used for industrial applications such as food-grade carbon dioxide, carbonated beverage filling, and enhanced oil recovery in oil extraction, thereby improving the environmental friendliness of wastewater treatment and maximizing resource utilization.

[0056] Furthermore, membrane coupling technology is incorporated into ambient temperature oxidation treatment. Specifically, membrane modules are installed and integrated into the ambient temperature oxidation treatment system. These membrane modules include nanofiltration or reverse osmosis membranes for removing small molecule organic matter and dissolved salts, which are particularly suitable for high-concentration and high-salt wastewater. They also include ceramic or composite membranes, which have higher chemical stability and corrosion resistance, making them suitable for strong oxidizing environments. Subsequently, highly oxidizing hydroxyl radicals are generated on the membrane surface through specific methods to enhance the oxidation effect. Specific methods include: photocatalytic membranes, which use membranes coated with photocatalysts such as TiO2 to generate hydroxyl radicals under ultraviolet light irradiation; electrochemical membranes, which generate hydroxyl radicals by electrolyzing water on the membrane surface through the application of an electric field; and persulfate activation, which adds persulfate and activates it on the membrane surface to generate hydroxyl radicals. Through these measures, a highly efficient oxidation reaction zone is formed on the membrane surface, significantly improving the degradation capacity of organic pollutants. Finally, the wastewater after oxidation treatment is separated by nanofiltration or reverse osmosis membranes to separate purified water from concentrate. The purified water that permeates through the membrane is disinfected, such as by chlorination or ultraviolet irradiation, to ensure water quality safety and further remove any trace suspended solids or particles, so that the water quality meets the standards for reuse or discharge. The concentrate is then recycled.

[0057] Resource recycling: This involves special treatment of the oxidized liquid to achieve salt recovery and resource utilization, specifically including:

[0058] 1. The preparation of high-purity salt includes:

[0059] Evaporation crystallization: Using a multi-effect evaporator or multi-stage flash evaporation technology, the water in the concentrate is gradually evaporated, leaving solid salts. Specifically, the multi-effect evaporator uses multiple evaporation chambers connected in series, with the pressure in each chamber gradually decreasing, so that the steam can be used step by step, improving energy efficiency; Mechanical vapor recompression system: Using a compressor to compress and heat the secondary steam generated by evaporation and then use it to heat the original liquid again, significantly reducing the need for external heat sources.

[0060] Ion exchange and purification: Ion exchange resins are used to remove specific ions, such as heavy metal ions or other harmful substances, to improve the purity of salts. Specifically, a suitable ion exchange resin is selected according to the target ion to ensure efficient removal of impurities. The resin is regenerated regularly to restore its exchange capacity and collect the adsorbed impurities.

[0061] Solid-liquid separation: Solid-liquid separation is achieved by centrifuging or filter press to obtain dry solid salt. Centrifugation is suitable for crystalline salts with larger particles and has high separation efficiency, while filter press is suitable for fine crystals or viscous liquids and can provide better separation results.

[0062] Refining process: Specifically includes: recrystallization, which further purifies the salt product by dissolving and cooling crystallization to remove trace impurities; washing, which cleans the crystal surface with pure water or solvent to remove attached impurities. Through further refining processes, high-purity salt products can be prepared, which are suitable for pharmaceutical or other high-requirement fields.

[0063] 2. Preparation of saline solution under specific conditions includes:

[0064] Composition Adjustment: Based on the needs of cephalosporin drug production, adjust parameters such as the concentration and component ratio of the saline solution to ensure compliance with the production process requirements. Specifically, dilution and concentration techniques are used, and the saline solution concentration is adjusted by adding pure water or continuing to evaporate and concentrate. Secondly, the components are adjusted by adding necessary additives, such as buffers and stabilizers, to ensure the chemical stability of the saline solution.

[0065] Quality control: Strictly monitor the quality indicators of the brine to ensure that it meets pharmaceutical standards. Specifically, online monitoring: Install automated water quality monitoring equipment to detect key parameters such as pH value, conductivity, and total organic carbon (TOC) in real time; Laboratory analysis: Regularly take samples and send them to the laboratory for detailed chemical analysis to verify the quality of the brine.

[0066] The high-purity salt or saline solution prepared through the above steps can be used in the preparation of cephalosporin drugs, thus improving resource utilization.

[0067] 3. Application of by-product salt

[0068] Classification and Testing: The extracted salts are classified and tested for quality to distinguish between high-purity salts and by-product salts. Specific monitoring methods include: physical testing, which assesses the physical properties of the salts through particle size analysis, density measurement, and other means; and chemical testing, which analyzes the chemical composition of the salts using instruments such as ICP-OES and XRF to ensure safety and applicability.

[0069] The extracted by-product salts can be applied to industrial production, for example:

[0070] Chemical industry: As a basic raw material for the production of chemicals such as chlor-alkali and sodium sulfate;

[0071] In the printing and dyeing industry: as a dyeing auxiliary agent, it helps fix the dye and improve the dyeing effect;

[0072] In the glass manufacturing industry: it is used as a clarifying agent or stabilizer to improve the quality of glass products.

[0073] Through the above resource recycling process, not only can high-purity salt and brine under specific conditions be extracted from cephalosporin pharmaceutical wastewater for the preparation of cephalosporin drugs, but by-product salt can also be rationally utilized to achieve the goals of maximizing resource utilization and environmental protection.

[0074] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A zero discharge treatment process for cephem pharmaceutical wastewater, characterized by, Includes the following steps: S1: Pretreatment of high-concentration, high-salt wastewater generated from cephalosporin pharmaceutical manufacturing; S2: The pretreated wastewater is subjected to ultra-high-speed oxidation treatment to oxidize the organic pollutants in the wastewater that are difficult to degrade through chemical reaction; S3: Salt recovery and resource utilization of the mixture after oxidation treatment; In step S2, the ultra-high-temperature oxidation treatment includes: Superheated oxidation treatment: Wastewater is fed into a superheated oxidation reactor for deep oxidation treatment, decomposing complex and difficult-to-degrade organic compounds. Ambient temperature oxidation treatment: Wastewater that has undergone ultra-high temperature oxidation treatment is passed into an ambient temperature oxidation reactor and ozone is introduced. The strong oxidizing properties of ozone are used to effectively degrade the remaining recalcitrant organic matter and improve the quality of the effluent. In the superheated oxidation process, the internal temperature of the reactor is set to 150-280℃, the pressure is set to 3-8MPa, and the residence time is set to 30-100min. A heat recovery system is set up between the ultra-high temperature oxidation treatment and the normal temperature oxidation treatment to recover and utilize the heat energy in the fluid after the ultra-high temperature oxidation treatment. In the ambient temperature oxidation process, the oxygen produced after treating the unreacted ozone is introduced into the superheated oxidation reactor to realize resource utilization. In step S3, salt recovery and resource utilization includes: High-purity salt: High-purity salt is obtained by processing and refining the oxidized liquid, and this high-purity salt is applied in the preparation process of cephalosporin drugs; Saline solution: Adjust the concentration and component ratio parameters of the saline solution according to the needs of cephalosporin drug production to meet the requirements of the production process; By-product salt: The extracted salt is classified and quality tested to distinguish between high-purity salt and by-product salt, and then applied to industrial production.

2. The zero-discharge treatment process for cephalosporin pharmaceutical wastewater according to claim 1, characterized in that, The preprocessing includes: Filtration stage: Use filters to remove large particulate solids to prevent clogging of subsequent equipment; pH adjustment: Adjust the acidity or alkalinity of the wastewater according to the requirements of subsequent treatment to ensure a suitable chemical reaction environment; Water quality homogenization: Wastewater is agitated by a mixer to reduce the impact of water quality fluctuations on subsequent treatment units.

3. The zero-discharge treatment process for cephalosporin pharmaceutical wastewater according to claim 1, characterized in that, Membrane coupling technology is incorporated into the ambient temperature oxidation process to improve the utilization rate of hydroxyl radicals through membrane coupling.

4. The zero-discharge treatment process for cephalosporin pharmaceutical wastewater according to claim 1, characterized in that, A preheating treatment stage is set before step S2. In the preheating treatment stage, wastewater is passed into a preheater to raise its temperature. After preheating, it is then passed into the superheated oxidation treatment stage.

5. The zero-discharge treatment process for cephalosporin pharmaceutical wastewater according to claim 4, characterized in that, In the preheating stage, the heat source of the preheater is the heat energy in the fluid after the superheated oxidation treatment.

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