Production wastewater treatment system and method

Abstract

The invention discloses a production wastewater treatment system and method, and belongs to the technical field of wastewater treatment. The system comprises a pretreatment section, a multi-stage adsorption section, an electrochemical reduction section, a biodegradation section and an oxidation section, in the pretreatment section, suspended matters are removed through a gravity settling tank and a filter, heavy metal ions are removed through activated carbon, ion exchange resin and a magnetic nano material in the multi-stage adsorption section, the electrochemical reduction section is used for promoting reduction of organic matters, the biodegradation section is used for degrading nitrogen and phosphorus, and residual organic matters are removed through ozone in the oxidation section. Each working section is provided with a detection device, and the control device adjusts operation parameters according to real-time monitoring data to ensure the treatment effect. Through automatic control and multi-stage treatment, the wastewater treatment efficiency is improved, the operation cost is reduced, and the device is suitable for treatment of various production wastewater.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and more particularly, to a production wastewater treatment system and method. Background Art

[0002] Industrial wastewater treatment is one of the current hot issues in the field of environmental protection. With the rapid development of the manufacturing and chemical industries, the amount of wastewater generated during production is constantly increasing. This wastewater often contains high concentrations of organic matter, heavy metals, nutrients, and other harmful substances. If this wastewater is discharged directly without effective treatment, it will cause serious pollution to rivers, lakes and other water bodies, affecting the balance of ecosystems and even threatening human health. Therefore, the development of efficient and economical industrial wastewater treatment technologies is particularly important. Although existing wastewater treatment technologies can solve some problems to a certain extent, they still have many shortcomings when treating high-concentration, difficult-to-degrade pollutants.

[0003] Traditional methods for treating industrial wastewater mainly include physical, chemical and biological methods. Although physical methods such as sedimentation and filtration can effectively remove suspended matter and large particulate pollutants in wastewater, they have limited effects on the removal of dissolved organic matter and heavy metal ions, especially under conditions of high pollution loads, the treatment efficiency drops significantly. Although chemical methods such as coagulation and precipitation can remove some soluble pollutants, they require the use of a large amount of chemical reagents, which increases the treatment cost and is prone to secondary pollution, such as sludge treatment and disposal problems. Biological methods can effectively degrade low-concentration organic matter and nutrients, but they are not effective in treating high-concentration and difficult-to-degrade pollutants, and the treatment time is long, the operation is complicated, and it is highly dependent on environmental conditions. The single application of these methods often cannot meet the current high standards for industrial wastewater treatment.

[0004] Although existing industrial wastewater treatment systems have adopted a multi-stage approach, attempting to improve treatment effectiveness by integrating multiple technical approaches, numerous problems remain in practical application. First, insufficient coordination and optimization between the various stages of a multi-stage treatment system result in low overall treatment efficiency. For example, inefficient solid-liquid separation in the pretreatment stage imposes a higher processing load on the subsequent adsorption and electrochemical reduction stages, impacting the stability and treatment effectiveness of the entire system. Second, there are limitations in the selection and use of adsorbent materials. While commonly used activated carbon and ion exchange resins offer excellent adsorption performance, they easily saturate when treating highly contaminated wastewater, requiring frequent replacement or regeneration, increasing operating and maintenance costs. Furthermore, imprecise control of current intensity and electrolysis time in the electrochemical reduction stage results in low reduction efficiency and the generation of large amounts of sludge, increasing the burden of subsequent treatment. Furthermore, the configuration of bio-carriers and biofilms in the biodegradation stage is not always optimal. Improper adjustment of aeration volume and biofilm thickness can lead to suboptimal degradation results and even biofilm aging and shedding. These issues restrict the performance and application scope of existing industrial wastewater treatment systems, urgently requiring innovation and improvement. Summary of the Invention

[0005] In order to overcome the technical problems existing in the above prior art, the present invention provides a production wastewater treatment system and method.

[0006] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0007] A production wastewater treatment system, comprising a pretreatment section, a multi-stage adsorption section, an electrochemical reduction section, a biodegradation section, and an oxidation section arranged in sequence, wherein:

[0008] The pretreatment section includes a gravity sedimentation tank, a filter and a first detection device. The pretreatment section is used to remove suspended matter in the production wastewater. The first detection device is used to detect the concentration of suspended matter in real time.

[0009] The multi-stage adsorption section includes a primary adsorption section, a secondary adsorption section, a tertiary adsorption section, and a second detection device. The multi-stage adsorption section is used to remove heavy metal ions; wherein the primary adsorption section is filled with activated carbon, the secondary adsorption section is filled with ion exchange resin, and the tertiary adsorption section is filled with magnetic nanomaterials; the second detection device is used to detect the concentration of heavy metal ions entering and leaving each stage of the adsorption section in real time;

[0010] The electrochemical reduction section includes an electrolytic cell, a first aeration device, and a third detection device. The electrolytic cell is used to promote the reduction reaction of organic matter. The first aeration device is used to provide oxygen. The third detection device is used to detect the concentration of organic matter in real time.

[0011] The biodegradation section includes a bioreactor and a fourth detection device. The bioreactor includes a biofilm and a second aeration device. The bioreactor is used to degrade nitrogen and phosphorus. The fourth detection device is used to detect nitrogen and phosphorus concentrations in real time.

[0012] The oxidation section includes an ozone oxidation tower and a fifth detection device, and the oxidation section is used to remove residual organic matter; the ozone oxidation tower includes an ozone generator, and the ozone generator is used to convert oxygen into ozone; the fifth detection device is used to detect the concentration of residual organic matter in real time;

[0013] The production wastewater treatment system further includes a control device configured to receive detection data from the first detection device, the second detection device, the third detection device, the fourth detection device, and the fifth detection device.

[0014] Furthermore, a sedimentation agent feeding mechanism is provided on one side of the gravity sedimentation tank, and the sedimentation agent feeding mechanism is used to feed the sedimentation agent into the gravity sedimentation tank; a stirring mechanism is provided in the gravity sedimentation tank, and the stirring mechanism is used to uniformly mix the production wastewater and the sedimentation agent;

[0015] The control device calculates the solid-liquid separation efficiency E based on the suspended matter concentration detected by the first detection device. The calculation formula of the solid-liquid separation efficiency E is as follows:

[0016]

[0017] Among them, C in Indicates the concentration of suspended solids in production wastewater before pretreatment, C out Indicates the suspended matter concentration in the production wastewater after pretreatment; when the solid-liquid separation efficiency E is lower than the first preset threshold, increase the sedimentation agent feeding amount of the sedimentation agent feeding mechanism and / or extend the stirring time of the stirring mechanism.

[0018] Furthermore, the sedimentation agent includes polyaluminium chloride and polyacrylamide, which are used to accelerate the sedimentation process of the suspended matter.

[0019] Furthermore, the control device calculates the adsorption capacity Q based on the heavy metal ion concentration detected by the second detection device. The calculation formula of the adsorption capacity Q is as follows:

[0020]

[0021] Wherein, C1 represents the heavy metal ion concentration of the production wastewater entering the multi-stage adsorption section, C2 represents the heavy metal ion concentration of the production wastewater flowing out of the multi-stage adsorption section, V represents the flow rate of the production wastewater, and M represents the total mass of the adsorption material in the multi-stage adsorption section; the adsorption material includes activated carbon, ion exchange resin and magnetic nanomaterial;

[0022] When the calculated adsorption capacity Q is lower than a second preset threshold, the filling amount of the adsorption material is increased.

[0023] Furthermore, the control device calculates the electrochemical reduction efficiency η based on the organic matter concentration detected by the third detection device. The calculation formula of the electrochemical reduction efficiency η is as follows:

[0024]

[0025] Among them, C 进 represents the organic matter concentration of the production wastewater entering the electrochemical reduction section, C 出 represents the organic matter concentration of the production wastewater flowing out of the electrochemical reduction section, F represents the flow rate of the production wastewater, J represents the current intensity passing through the anode and cathode in the electrolytic cell, and T represents the electrolysis time;

[0026] When the calculated electrochemical reduction efficiency η is lower than a third preset threshold, the current intensity and electrolysis time of the electrolytic cell are adjusted.

[0027] Furthermore, the control device calculates the biodegradation rate r based on the nitrogen and phosphorus concentrations detected by the fourth detection device. The calculation formula of the biodegradation rate r is as follows:

[0028] r=kC

[0029] Where r represents the biodegradation rate, k represents the degradation constant, and C represents the nitrogen and phosphorus concentrations in the production wastewater;

[0030] When the calculated biodegradation rate r is lower than a fourth preset threshold, the aeration volume of the second aeration device is increased and / or the thickness of the biofilm is increased.

[0031] Furthermore, the control device calculates the oxidation efficiency ξ based on the concentration of the residual organic matter detected by the fifth detection device. The calculation formula of the oxidation efficiency ξ is as follows:

[0032]

[0033] Among them, C 入水 represents the concentration of residual organic matter in the production wastewater entering the oxidation section, C 排水represents the concentration of residual organic matter in the production wastewater discharged from the oxidation section, R represents the flow rate of the production wastewater, P represents the power of the ozone generator, and S represents the oxidation treatment time;

[0034] When the calculated oxidation efficiency ξ is lower than a fifth preset threshold, the power of the ozone generator is increased and / or the oxidation treatment time is extended.

[0035] Furthermore, the ozone oxidation tower also includes a third aeration device, which is used to generate bubbles in the ozone oxidation tower to disperse ozone gas into the production wastewater.

[0036] Furthermore, the control device includes:

[0037] a data acquisition module, the data acquisition module being used to acquire detection data of the first detection device, the second detection device, the third detection device, the fourth detection device, and the fifth detection device in real time;

[0038] A data processing module, which is used to analyze and process the collected detection data and generate control instructions;

[0039] An execution module is used to adjust the operating parameters of each work section according to the control instruction.

[0040] A method for treating production wastewater, wherein the method divides the treatment of production wastewater into a pretreatment stage, a multi-stage adsorption stage, an electrochemical reduction stage, a biodegradation stage, and a post-treatment stage, and specifically comprises the following steps:

[0041] In the pretreatment stage, suspended solids in the production wastewater are removed through a gravity sedimentation tank and a filter, and the concentration of the suspended solids is detected in real time using a first detection device; a sedimentation agent delivery mechanism is provided on one side of the gravity sedimentation tank, and the sedimentation agent delivery mechanism is used to deliver the sedimentation agent to the gravity sedimentation tank; a stirring mechanism is provided in the gravity sedimentation tank, and the stirring mechanism is used to uniformly mix the production wastewater and the sedimentation agent;

[0042] In the multi-stage adsorption stage, heavy metal ions are removed through a primary adsorption section, a secondary adsorption section, and a tertiary adsorption section; wherein the primary adsorption section is filled with activated carbon, the secondary adsorption section is filled with ion exchange resin, and the tertiary adsorption section is filled with magnetic nanomaterials; a second detection device is used to detect in real time the concentration of heavy metal ions entering and leaving each adsorption section;

[0043] In the electrochemical reduction stage, the reduction reaction of organic matter is promoted by the electrolytic cell and the first aeration device, and the concentration of organic matter is detected in real time by the third detection device;

[0044] In the biodegradation stage, nitrogen and phosphorus are degraded by the biofilm and the second aeration device, and the nitrogen and phosphorus concentrations are detected in real time using the fourth detection device;

[0045] In the post-processing stage, the concentration of residual organic matter is further reduced by an ozone generator, and the concentration of residual organic matter is detected in real time by a fifth detection device;

[0046] receiving, by means of a control device, the suspended solids concentration, heavy metal ion concentration, organic matter concentration, nitrogen and phosphorus concentration, and residual organic matter concentration detected by the first detection device, the second detection device, the third detection device, the fourth detection device, and the fifth detection device, respectively;

[0047] The control device calculates a solid-liquid separation efficiency E based on the received suspended matter concentration, and when the solid-liquid separation efficiency E is lower than a first preset threshold, increases the amount of sedimentation agent delivered by the sedimentation agent delivery mechanism and / or extends the stirring time of the stirring mechanism;

[0048] The control device calculates an adsorption capacity Q based on the received heavy metal ion concentration, and when the calculated adsorption capacity Q is lower than a second preset threshold, increases a filling amount of at least one of activated carbon, ion exchange resin, and magnetic nanomaterial;

[0049] The control device calculates an electrochemical reduction efficiency η based on the received organic matter concentration, and when the calculated electrochemical reduction efficiency η is lower than a third preset threshold, adjusts the current intensity and electrolysis time of the electrolytic cell;

[0050] The control device calculates a biodegradation rate r based on the received nitrogen and phosphorus concentrations, and when the calculated biodegradation rate r is lower than a fourth preset threshold, increases the aeration volume of the second aeration device and / or increases the thickness of the biofilm;

[0051] The control device calculates the oxidation efficiency ξ based on the received concentration of the residual organic matter, and when the calculated oxidation efficiency ξ is lower than a fifth preset threshold, increases the power of the ozone generator and / or extends the oxidation treatment time.

[0052] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0053] The present invention provides a production wastewater treatment system and method. By integrating pretreatment, multi-stage adsorption, electrochemical reduction, biodegradation, and oxidation processes, the overall efficiency and reliability of wastewater treatment are significantly improved. Specifically, the pretreatment process utilizes a gravity settling tank and filter, combined with a sedimentation agent and stirring mechanism, to effectively remove suspended matter, ensuring the stable operation of subsequent processes. The solid-liquid separation efficiency is adjusted through real-time detection and control devices. The multi-stage adsorption process is filled with activated carbon, ion exchange resin, and magnetic nanomaterials to remove heavy metal ions step by step, ensuring that the adsorption capacity is always in an efficient state, preventing material saturation, and improving the treatment effect. The electrochemical reduction process significantly improves the reduction efficiency of organic matter and reduces secondary pollution by optimizing the current intensity and electrolysis time. The biodegradation process utilizes biofilms and aeration equipment to precisely control the aeration volume and biofilm thickness, effectively degrading nitrogen and phosphorus and increasing the biodegradation rate. The oxidation process utilizes an ozone oxidation tower. By adjusting the ozone generator power and oxidation treatment time, residual organic matter is completely removed, ensuring that the effluent quality meets standards. Furthermore, the control device collects and processes test data from each process section in real time, adaptively adjusting operating parameters to make the entire system more intelligent and efficient. These innovative designs and optimization measures not only significantly improve wastewater treatment efficiency, but also reduce treatment costs and ease the complexity of operation and maintenance, resulting in significant environmental and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0055] Figure 1 is a system block diagram of the production wastewater treatment system of the present invention;

[0056] Figure 2 This is a flow chart of the production wastewater treatment method of the present invention;

[0057] Explanation of the markings in the figure: 1. Pretreatment section; 2. Multi-stage adsorption section; 3. Electrochemical reduction section; 4. Biodegradation section; 5. Oxidation section. DETAILED DESCRIPTION

[0058] In order to better understand the purpose, structure and function of the present invention, the technical solution of the present invention is further described in detail below with reference to the accompanying drawings and specific preferred embodiments.

[0059] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the components and therefore cannot be understood as limiting the present invention. The specific dimensions used in the embodiments are only for illustrating the technical solutions and do not limit the scope of protection of the present invention. It is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0060] Unless otherwise expressly specified or limited, terms such as "installed," "installed," "connected," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0061] Example 1:

[0062] like Figure 1 As shown, the present invention provides a technical solution:

[0063] A production wastewater treatment system, comprising a pretreatment section 1, a multi-stage adsorption section 2, an electrochemical reduction section 3, a biodegradation section 4, and an oxidation section 5 arranged in sequence, wherein:

[0064] The pretreatment section 1 includes a gravity sedimentation tank, a filter and a first detection device. The pretreatment section is used to remove suspended matter in the production wastewater. The first detection device is used to detect the concentration of suspended matter in real time.

[0065] The multi-stage adsorption section 2 includes a primary adsorption section, a secondary adsorption section, a tertiary adsorption section, and a second detection device. The multi-stage adsorption section is used to remove heavy metal ions; wherein the primary adsorption section is filled with activated carbon, the secondary adsorption section is filled with ion exchange resin, and the tertiary adsorption section is filled with magnetic nanomaterials; the second detection device is used to detect the concentration of heavy metal ions entering and leaving each stage of the adsorption section in real time;

[0066] The electrochemical reduction section 3 includes an electrolytic cell, a first aeration device, and a third detection device. The electrolytic cell is used to promote the reduction reaction of organic matter. The first aeration device is used to provide oxygen. The third detection device is used to detect the concentration of organic matter in real time.

[0067] The biodegradation section 4 includes a bioreactor and a fourth detection device. The bioreactor includes a biofilm and a second aeration device. The bioreactor is used to degrade nitrogen and phosphorus. The fourth detection device is used to detect nitrogen and phosphorus concentrations in real time.

[0068] The oxidation section 5 includes an ozone oxidation tower and a fifth detection device. The oxidation section is used to remove residual organic matter. The ozone oxidation tower includes an ozone generator, which is used to convert oxygen into ozone. The fifth detection device is used to detect the concentration of residual organic matter in real time.

[0069] The production wastewater treatment system further includes a control device configured to receive detection data from the first detection device, the second detection device, the third detection device, the fourth detection device, and the fifth detection device.

[0070] The present application provides a system for comprehensive treatment of production wastewater, which sequentially arranges pretreatment, multi-stage adsorption, electrochemical reduction, biodegradation and oxidation sections to form a complete treatment process. This multi-stage treatment scheme can effectively remove a variety of pollutants in wastewater and improve overall treatment efficiency. In the pretreatment stage, suspended solids are removed by gravity sedimentation tanks and filters to provide clean inlet water for subsequent treatment sections; in the multi-stage adsorption stage, heavy metal ions are removed by activated carbon, ion exchange resins and magnetic nanomaterials to ensure that heavy metals in wastewater are treated; in the electrochemical reduction stage, electrolytic cells and aeration equipment are used to promote the reduction reaction of organic matter and further remove organic pollutants; in the biodegradation stage, nitrogen and phosphorus are degraded by biofilms and aeration equipment to improve the nitrogen and phosphorus removal rate; in the oxidation stage, ozone generators are used to generate ozone to remove residual organic matter and ensure that the effluent quality meets the standards. Each section is equipped with detection equipment that can monitor the concentration of pollutants in real time. The first detection device in the pretreatment section monitors suspended solids concentration in real time. The second detection device in the multi-stage adsorption section monitors the concentration of heavy metal ions entering and leaving each stage in real time. The third detection device in the electrochemical reduction section monitors organic matter concentration in real time. The fourth detection device in the biodegradation section monitors nitrogen and phosphorus concentrations in real time. The fifth detection device in the oxidation section monitors residual organic matter concentration in real time. This real-time monitoring data can help adjust the operating parameters of each section to ensure consistent and reliable treatment results.

[0071] Example 2:

[0072] On the basis of Example 1, a sedimentation agent feeding mechanism is provided on one side of the gravity sedimentation tank, and the sedimentation agent feeding mechanism is used to feed the sedimentation agent into the gravity sedimentation tank; a stirring mechanism is provided in the gravity sedimentation tank, and the stirring mechanism is used to uniformly mix the production wastewater and the sedimentation agent;

[0073] The control device calculates the solid-liquid separation efficiency E based on the suspended matter concentration detected by the first detection device. The calculation formula of the solid-liquid separation efficiency E is as follows:

[0074]

[0075] Among them, C in Indicates the concentration of suspended solids in production wastewater before pretreatment, C out Indicates the suspended matter concentration in the production wastewater after pretreatment; when the solid-liquid separation efficiency E is lower than the first preset threshold, increase the sedimentation agent feeding amount of the sedimentation agent feeding mechanism and / or extend the stirring time of the stirring mechanism.

[0076] Furthermore, the sedimentation agent includes polyaluminium chloride and polyacrylamide, which are used to accelerate the sedimentation process of the suspended matter.

[0077] Furthermore, the control device calculates the adsorption capacity Q based on the heavy metal ion concentration detected by the second detection device. The calculation formula of the adsorption capacity Q is as follows:

[0078]

[0079] Wherein, C1 represents the heavy metal ion concentration of the production wastewater entering the multi-stage adsorption section, C2 represents the heavy metal ion concentration of the production wastewater flowing out of the multi-stage adsorption section, V represents the flow rate of the production wastewater, and M represents the total mass of the adsorption material in the multi-stage adsorption section; the adsorption material includes activated carbon, ion exchange resin and magnetic nanomaterial;

[0080] When the calculated adsorption capacity Q is lower than a second preset threshold, the filling amount of the adsorption material is increased.

[0081] Furthermore, the control device calculates the electrochemical reduction efficiency η based on the organic matter concentration detected by the third detection device. The calculation formula of the electrochemical reduction efficiency η is as follows:

[0082]

[0083] Among them, C 进 represents the organic matter concentration of the production wastewater entering the electrochemical reduction section, C 出 represents the organic matter concentration of the production wastewater flowing out of the electrochemical reduction section, F represents the flow rate of the production wastewater, J represents the current intensity passing through the anode and cathode in the electrolytic cell, and T represents the electrolysis time;

[0084] When the calculated electrochemical reduction efficiency η is lower than a third preset threshold, the current intensity and electrolysis time of the electrolytic cell are adjusted.

[0085] Furthermore, the control device calculates the biodegradation rate r based on the nitrogen and phosphorus concentrations detected by the fourth detection device. The calculation formula of the biodegradation rate r is as follows:

[0086] r=kC

[0087] Where r represents the biodegradation rate, k represents the degradation constant, and C represents the nitrogen and phosphorus concentrations in the production wastewater;

[0088] When the calculated biodegradation rate r is lower than a fourth preset threshold, the aeration volume of the second aeration device is increased and / or the thickness of the biofilm is increased.

[0089] Furthermore, the control device calculates the oxidation efficiency ξ based on the concentration of the residual organic matter detected by the fifth detection device. The calculation formula of the oxidation efficiency ξ is as follows:

[0090]

[0091] Among them, C 入水 represents the concentration of residual organic matter in the production wastewater entering the oxidation section, C 排水 represents the concentration of residual organic matter in the production wastewater discharged from the oxidation section, R represents the flow rate of the production wastewater, P represents the power of the ozone generator, and S represents the oxidation treatment time;

[0092] When the calculated oxidation efficiency ξ is lower than a fifth preset threshold, the power of the ozone generator is increased and / or the oxidation treatment time is extended.

[0093] Furthermore, the ozone oxidation tower also includes a third aeration device, which is used to generate bubbles in the ozone oxidation tower to disperse ozone gas into the production wastewater.

[0094] Furthermore, the control device includes:

[0095] a data acquisition module, the data acquisition module being used to acquire detection data of the first detection device, the second detection device, the third detection device, the fourth detection device, and the fifth detection device in real time;

[0096] A data processing module, which is used to analyze and process the collected detection data and generate control instructions;

[0097] An execution module is used to adjust the operating parameters of each work section according to the control instruction.

[0098] Example 3:

[0099] like Figure 2 As shown, the present invention provides a technical solution:

[0100] A method for treating production wastewater, wherein the method divides the treatment of production wastewater into a pretreatment stage, a multi-stage adsorption stage, an electrochemical reduction stage, a biodegradation stage, and a post-treatment stage, and specifically comprises the following steps:

[0101] In the pretreatment stage, suspended solids in the production wastewater are removed through a gravity sedimentation tank and a filter, and the concentration of the suspended solids is detected in real time using a first detection device; a sedimentation agent delivery mechanism is provided on one side of the gravity sedimentation tank, and the sedimentation agent delivery mechanism is used to deliver the sedimentation agent to the gravity sedimentation tank; a stirring mechanism is provided in the gravity sedimentation tank, and the stirring mechanism is used to uniformly mix the production wastewater and the sedimentation agent;

[0102] In the multi-stage adsorption stage, heavy metal ions are removed through a primary adsorption section, a secondary adsorption section, and a tertiary adsorption section; wherein the primary adsorption section is filled with activated carbon, the secondary adsorption section is filled with ion exchange resin, and the tertiary adsorption section is filled with magnetic nanomaterials; a second detection device is used to detect in real time the concentration of heavy metal ions entering and leaving each adsorption section;

[0103] In the electrochemical reduction stage, the reduction reaction of organic matter is promoted by the electrolytic cell and the first aeration device, and the concentration of organic matter is detected in real time by the third detection device;

[0104] In the biodegradation stage, nitrogen and phosphorus are degraded by the biofilm and the second aeration device, and the nitrogen and phosphorus concentrations are detected in real time using the fourth detection device;

[0105] In the post-processing stage, the concentration of residual organic matter is further reduced by an ozone generator, and the concentration of residual organic matter is detected in real time by a fifth detection device;

[0106] receiving, by means of a control device, the suspended solids concentration, heavy metal ion concentration, organic matter concentration, nitrogen and phosphorus concentration, and residual organic matter concentration detected by the first detection device, the second detection device, the third detection device, the fourth detection device, and the fifth detection device, respectively;

[0107] The control device calculates a solid-liquid separation efficiency E based on the received suspended matter concentration, and when the solid-liquid separation efficiency E is lower than a first preset threshold, increases the amount of sedimentation agent delivered by the sedimentation agent delivery mechanism and / or extends the stirring time of the stirring mechanism;

[0108] The control device calculates an adsorption capacity Q based on the received heavy metal ion concentration, and when the calculated adsorption capacity Q is lower than a second preset threshold, increases a filling amount of at least one of activated carbon, ion exchange resin, and magnetic nanomaterial;

[0109] The control device calculates an electrochemical reduction efficiency η based on the received organic matter concentration, and when the calculated electrochemical reduction efficiency η is lower than a third preset threshold, adjusts the current intensity and electrolysis time of the electrolytic cell;

[0110] The control device calculates a biodegradation rate r based on the received nitrogen and phosphorus concentrations, and when the calculated biodegradation rate r is lower than a fourth preset threshold, increases the aeration volume of the second aeration device and / or increases the thickness of the biofilm;

[0111] The control device calculates the oxidation efficiency ξ based on the received concentration of the residual organic matter, and when the calculated oxidation efficiency ξ is lower than a fifth preset threshold, increases the power of the ozone generator and / or extends the oxidation treatment time.

[0112] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A production wastewater treatment system, characterized in that: The production wastewater treatment system includes a pretreatment section, a multi-stage adsorption section, an electrochemical reduction section, a biodegradation section and an oxidation section arranged in sequence, wherein: The pretreatment section includes a gravity sedimentation tank, a filter and a first detection device. The pretreatment section is used to remove suspended matter in the production wastewater. The first detection device is used to detect the concentration of suspended matter in real time. The multi-stage adsorption section includes a primary adsorption section, a secondary adsorption section, a tertiary adsorption section, and a second detection device. The multi-stage adsorption section is used to remove heavy metal ions; wherein the primary adsorption section is filled with activated carbon, the secondary adsorption section is filled with ion exchange resin, and the tertiary adsorption section is filled with magnetic nanomaterials; the second detection device is used to detect the concentration of heavy metal ions entering and leaving each stage of the adsorption section in real time; The electrochemical reduction section includes an electrolytic cell, a first aeration device, and a third detection device. The electrolytic cell is used to promote the reduction reaction of organic matter. The first aeration device is used to provide oxygen. The third detection device is used to detect the concentration of organic matter in real time. The biodegradation section includes a bioreactor and a fourth detection device. The bioreactor includes a biofilm and a second aeration device. The bioreactor is used to degrade nitrogen and phosphorus. The fourth detection device is used to detect nitrogen and phosphorus concentrations in real time. The oxidation section includes an ozone oxidation tower and a fifth detection device, and the oxidation section is used to remove residual organic matter; the ozone oxidation tower includes an ozone generator, and the ozone generator is used to convert oxygen into ozone; the fifth detection device is used to detect the concentration of residual organic matter in real time; The production wastewater treatment system further includes a control device configured to receive detection data from the first detection device, the second detection device, the third detection device, the fourth detection device, and the fifth detection device.

2. The production wastewater treatment system according to claim 1, characterized in that: A sedimentation agent feeding mechanism is provided on one side of the gravity sedimentation tank, and the sedimentation agent feeding mechanism is used to feed the sedimentation agent into the gravity sedimentation tank; a stirring mechanism is provided in the gravity sedimentation tank, and the stirring mechanism is used to uniformly mix the production wastewater and the sedimentation agent; The control device calculates the solid-liquid separation efficiency E based on the suspended matter concentration detected by the first detection device. The calculation formula of the solid-liquid separation efficiency E is as follows: Among them, C in Indicates the concentration of suspended solids in production wastewater before pretreatment, C out Indicates the suspended matter concentration in the production wastewater after pretreatment; when the solid-liquid separation efficiency E is lower than the first preset threshold, increase the sedimentation agent feeding amount of the sedimentation agent feeding mechanism and / or extend the stirring time of the stirring mechanism.

3. The production wastewater treatment system according to claim 2, characterized in that: The sedimentation agent includes polyaluminium chloride and polyacrylamide, and is used to accelerate the sedimentation process of the suspended matter.

4. The production wastewater treatment system according to claim 1, characterized in that: The control device calculates the adsorption capacity Q based on the heavy metal ion concentration detected by the second detection device. The calculation formula of the adsorption capacity Q is as follows: Wherein, C1 represents the heavy metal ion concentration of the production wastewater entering the multi-stage adsorption section, C2 represents the heavy metal ion concentration of the production wastewater flowing out of the multi-stage adsorption section, V represents the flow rate of the production wastewater, and M represents the total mass of the adsorption material in the multi-stage adsorption section; the adsorption material includes activated carbon, ion exchange resin and magnetic nanomaterial; When the calculated adsorption capacity Q is lower than a second preset threshold, the filling amount of the adsorption material is increased.

5. The production wastewater treatment system according to claim 1, characterized in that: The control device calculates the electrochemical reduction efficiency η based on the organic matter concentration detected by the third detection device. The calculation formula of the electrochemical reduction efficiency η is as follows: Among them, C 进 represents the organic matter concentration of the production wastewater entering the electrochemical reduction section, C 出 represents the organic matter concentration of the production wastewater flowing out of the electrochemical reduction section, F represents the flow rate of the production wastewater, J represents the current intensity passing through the anode and cathode in the electrolytic cell, and T represents the electrolysis time; When the calculated electrochemical reduction efficiency η is lower than a third preset threshold, the current intensity and electrolysis time of the electrolytic cell are adjusted.

6. The production wastewater treatment system according to claim 1, characterized in that: The control device calculates the biodegradation rate r based on the nitrogen and phosphorus concentrations detected by the fourth detection device. The calculation formula of the biodegradation rate r is as follows: r=kC Where r represents the biodegradation rate, k represents the degradation constant, and C represents the nitrogen and phosphorus concentrations in the production wastewater; When the calculated biodegradation rate r is lower than a fourth preset threshold, the aeration volume of the second aeration device is increased and / or the thickness of the biofilm is increased.

7. The production wastewater treatment system according to claim 1, characterized in that: The control device calculates the oxidation efficiency ξ based on the concentration of residual organic matter detected by the fifth detection device. The calculation formula of the oxidation efficiency ξ is as follows: Among them, C 入水 represents the concentration of residual organic matter in the production wastewater entering the oxidation section, C 排水 represents the concentration of residual organic matter in the production wastewater discharged from the oxidation section, R represents the flow rate of the production wastewater, P represents the power of the ozone generator, and S represents the oxidation treatment time; When the calculated oxidation efficiency ξ is lower than a fifth preset threshold, the power of the ozone generator is increased and / or the oxidation treatment time is extended.

8. The production wastewater treatment system according to claim 1, characterized in that: The ozone oxidation tower further includes a third aeration device, which is used to generate bubbles in the ozone oxidation tower to disperse ozone gas into the production wastewater.

9. The production wastewater treatment system according to claim 1, characterized in that: The control device comprises: a data acquisition module, the data acquisition module being used to acquire detection data of the first detection device, the second detection device, the third detection device, the fourth detection device, and the fifth detection device in real time; A data processing module, which is used to analyze and process the collected detection data and generate control instructions; An execution module is used to adjust the operating parameters of each work section according to the control instruction.

10. A method for treating production wastewater, characterized in that: The production wastewater treatment method is divided into a pretreatment stage, a multi-stage adsorption stage, an electrochemical reduction stage, a biodegradation stage and a post-treatment stage, and specifically includes the following steps: In the pretreatment stage, suspended solids in the production wastewater are removed through a gravity sedimentation tank and a filter, and the concentration of the suspended solids is detected in real time using a first detection device; a sedimentation agent delivery mechanism is provided on one side of the gravity sedimentation tank, and the sedimentation agent delivery mechanism is used to deliver the sedimentation agent to the gravity sedimentation tank; a stirring mechanism is provided in the gravity sedimentation tank, and the stirring mechanism is used to uniformly mix the production wastewater and the sedimentation agent; In the multi-stage adsorption stage, heavy metal ions are removed through a primary adsorption section, a secondary adsorption section, and a tertiary adsorption section; wherein the primary adsorption section is filled with activated carbon, the secondary adsorption section is filled with ion exchange resin, and the tertiary adsorption section is filled with magnetic nanomaterials; a second detection device is used to detect in real time the concentration of heavy metal ions entering and leaving each adsorption section; In the electrochemical reduction stage, the reduction reaction of organic matter is promoted by the electrolytic cell and the first aeration device, and the concentration of organic matter is detected in real time by the third detection device; In the biodegradation stage, nitrogen and phosphorus are degraded by the biofilm and the second aeration device, and the nitrogen and phosphorus concentrations are detected in real time using the fourth detection device; In the post-processing stage, the concentration of residual organic matter is further reduced by an ozone generator, and the concentration of residual organic matter is detected in real time by a fifth detection device; receiving, by means of a control device, the suspended solids concentration, heavy metal ion concentration, organic matter concentration, nitrogen and phosphorus concentration, and residual organic matter concentration detected by the first detection device, the second detection device, the third detection device, the fourth detection device, and the fifth detection device, respectively; The control device calculates a solid-liquid separation efficiency E based on the received suspended matter concentration, and when the solid-liquid separation efficiency E is lower than a first preset threshold, increases the amount of sedimentation agent delivered by the sedimentation agent delivery mechanism and / or extends the stirring time of the stirring mechanism; The control device calculates an adsorption capacity Q based on the received heavy metal ion concentration, and when the calculated adsorption capacity Q is lower than a second preset threshold, increases a filling amount of at least one of activated carbon, ion exchange resin, and magnetic nanomaterial; The control device calculates an electrochemical reduction efficiency η based on the received organic matter concentration, and when the calculated electrochemical reduction efficiency η is lower than a third preset threshold, adjusts the current intensity and electrolysis time of the electrolytic cell; The control device calculates a biodegradation rate r based on the received nitrogen and phosphorus concentrations, and when the calculated biodegradation rate r is lower than a fourth preset threshold, increases the aeration volume of the second aeration device and / or increases the thickness of the biofilm; The control device calculates the oxidation efficiency ξ based on the received concentration of the residual organic matter, and when the calculated oxidation efficiency ξ is lower than a fifth preset threshold, increases the power of the ozone generator and / or extends the oxidation treatment time.

Images