Hazardous waste liquid treatment system
By integrating electrocatalytic oxidation, ozone oxidation, hydrolysis acidification, and MBR membrane separation processes, the problem of low efficiency in hazardous waste liquid treatment has been solved, achieving efficient and environmentally friendly waste liquid treatment results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-03-27
AI Technical Summary
In existing technologies, physical methods are ineffective at removing soluble pollutants, chemical methods consume large amounts of reagents and generate secondary pollution, and biological methods have poor tolerance to toxic substances, resulting in low efficiency in the treatment of hazardous waste and wastewater.
An integrated process combining electrocatalytic oxidation, ozone oxidation, hydrolysis acidification, biochemical treatment, and MBR membrane separation is employed. Electrocatalytic oxidation breaks down large organic molecules into smaller molecules, ozone oxidation further degrades organic matter, hydrolysis acidification improves biodegradability, and the MBR membrane achieves solid-liquid separation, ensuring that the effluent meets standards.
It achieves efficient degradation of hazardous waste liquids with complex components, ensuring that the treated water meets discharge standards, enhancing biochemical treatment efficiency, and reducing treatment costs and secondary pollution.
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Figure CN224047186U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model discloses sewage treatment technical field, specifically related to hazardous waste liquid treatment system. BACKGROUND
[0002] Hazardous waste liquid, its component is extremely complex, contains various organic matter, inorganic matter and heavy metal and so on, has the characteristics such as high toxicity, high concentration and difficult degradation.
[0003] In related art, hazardous waste liquid treatment method usually has physical method, chemical method and biological method.
[0004] Among them, the physical method has limited removal effect on the solubility of pollutants, and the adsorbent and other materials may need to be regenerated or replaced after use, increase the processing cost. The chemical method needs to consume a large amount of chemical reagent, and will produce secondary pollution, such as sludge generated in the oxidation process contains high concentration of heavy metals and toxic organic matter. The biological method has poor tolerance to difficult-to-degrade organic matter and high-concentration toxic substances in chemical wastewater. When the wastewater contains high-concentration heavy metals, the activity of microorganisms will be inhibited, resulting in a significant reduction in processing efficiency.
[0005] Therefore, how to provide a hazardous waste liquid treatment system to meet the technical problems of treating hazardous waste liquid with complex components.
[0006] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background technology of the present application, therefore, the above description is not considered as the information of prior art. CONTENT OF THE UTILITY MODEL
[0007] The embodiments of the present disclosure at least provide a hazardous waste liquid treatment system.
[0008] The embodiments of the present disclosure provide a hazardous waste liquid treatment system, comprising:
[0009] The wastewater conditioning tank is used for collecting hazardous waste liquid.
[0010] The electro-catalytic oxidation tank is in communication with the wastewater conditioning tank.
[0011] The coagulation and flocculation tank is in communication with the electro-catalytic oxidation tank.
[0012] The intermediate water tank is in communication with the coagulation and flocculation tank.
[0013] The ozone catalytic oxidation tower is in communication with the intermediate water tank.
[0014] The hydrolysis acidification tank is in communication with the ozone catalytic oxidation tower.
[0015] The anoxic tank is in communication with the hydrolysis acidification tank.
[0016] an aerobic tank in communication with the anoxic tank;
[0017] an MBR membrane tank in communication with the aerobic tank;
[0018] a drain tank in communication with a drain port of the MBR membrane tank.
[0019] In an alternative embodiment, the drain tank is provided with a drain pipe and a backflow pipe;
[0020] The drain tank is in communication with an electro-catalytic oxidation tank, an intermediate water tank and a hydrolytic acidification tank through the backflow pipe.
[0021] In an alternative embodiment, the hazardous waste liquid treatment system further comprises an aeration fan;
[0022] The aeration fan is in communication with an aeration pipe in the hydrolytic acidification tank and the anoxic tank through an aeration air pipe, respectively.
[0023] In an alternative embodiment, the hazardous waste liquid treatment system further comprises a sand filter device;
[0024] The drain port of the MBR membrane tank is in communication with a water inlet port of the drain tank through the sand filter device.
[0025] In an alternative embodiment, the hazardous waste liquid treatment system further comprises an ozone generator;
[0026] The ozone generated by the ozone generator is divided into two paths, one of which is transported to an ozone catalytic oxidation tower, and the other of which is transported to the sand filter device.
[0027] In an alternative embodiment, the hazardous waste liquid treatment system further comprises an MBR cleaning water tank;
[0028] The MBR cleaning water tank is arranged on the top of the MBR membrane tank and is used for cleaning the MBR membrane of the MBR membrane tank.
[0029] In an alternative embodiment, the hazardous waste liquid treatment system further comprises:
[0030] a sludge concentration tank in communication with a sludge discharge port of the coagulation and flocculation tank and a sludge discharge port of the MBR membrane tank.
[0031] In an alternative embodiment, the hazardous waste liquid treatment system further comprises a plate filter press;
[0032] The plate filter press is in communication with the sludge discharge port of the sludge concentration tank;
[0033] A drain port of the plate filter press is in communication with the wastewater conditioning tank.
[0034] In an alternative embodiment, the number of said aerobic tanks is multiple;
[0035] The plurality of said aerobic tanks are arranged in series.
[0036] The hazardous waste liquid treatment system of the utility model realizes the efficient degradation of complex component hazardous waste liquid through the integrated process of electro-catalytic oxidation, ozone oxidation, hydrolysis acidification, biochemical treatment and MBR membrane separation, so that the finally discharged water meets the discharge standard; the macromolecular refractory organic matter is decomposed into small molecules through electro-catalytic oxidation and ozone oxidation, so that the efficiency of subsequent biochemical treatment is enhanced.
[0037] Other features and advantages of the utility model will be set forth in the subsequent description, and partially become obvious from the description, or be understood by implementing the utility model. The purpose and other advantages of the utility model are realized and obtained through the structure specially pointed out in the description and the drawings.
[0038] In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the preferred embodiments are described in detail in the paper, and the drawings are attached. BRIEF DESCRIPTION OF DRAWINGS
[0039] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed in the specific embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and for ordinary skilled in the art, other drawings can be obtained without creative labor according to these drawings.
[0040] Figure 1 The principle schematic diagram of the hazardous waste liquid treatment system provided by the embodiment of the disclosure is shown in the figure.
[0041] Figure 2 The principle schematic diagram of the pressure filtration part of the hazardous waste liquid treatment system provided by the embodiment of the disclosure is shown in the figure.
[0042] In the figure: 100, wastewater conditioning tank; 200, electro-catalytic oxidation tank; 300, coagulation and flocculation tank; 400, intermediate water tank; 500, ozone catalytic oxidation tower; 510, ozone generator; 600, hydrolysis acidification tank; 610, aeration fan; 700, anoxic tank; 800, aerobic tank; 900, MBR membrane tank; 910, drainage tank; 911, drainage pipe; 912, backflow pipe; 913, sand filter device; 920, sludge concentration tank; 930, MBR cleaning water tank; 940, plate filter press. DETAILED DESCRIPTION
[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the utility model will be described clearly and completely in combination with the drawings below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0044] It is found through research that the physical method has poor removal effect on soluble pollutants, and the adsorbent has high regeneration cost; the chemical method has large reagent consumption and is easy to cause secondary pollution, such as a large amount of heavy metals in sludge; the microorganism of the biological method has poor tolerance to toxic substances and low processing efficiency, so that the above methods alone or simply combined cannot meet the processing needs of the hazardous waste liquid.
[0045] Based on the above research, the embodiment of the disclosure provides a hazardous waste liquid treatment system, which arranges multiple treatment processes in a certain order to treat the hazardous waste liquid with complex components.
[0046] The complex components refer to one or more of the following complex components of the hazardous waste liquid: difficult-to-degrade macromolecular organic matter, heavy metal ions, cyanide, etc.
[0047] The defects of the above schemes are the results of the inventors after practice and careful research, so the discovery process of the above problems and the solutions proposed by the disclosure in this paper should be the contribution of the inventors to the disclosure in the process of the disclosure.
[0048] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0049] Some embodiments of the utility model will be described in detail below in combination with the drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.
[0050] Please refer to Figure 1 At least one embodiment provides a hazardous waste liquid treatment system, which comprises the following structure:
[0051] The wastewater conditioning tank 100 is used for collecting the hazardous waste liquid. Specifically, the wastewater conditioning tank 100 is used for water quality adjustment of the hazardous waste liquid.
[0052] In some embodiments, the hazardous waste liquid of different time periods and different sources is collected by the wastewater conditioning tank 100, and then the wastewater of different concentrations and components is fully mixed by cooperating with mechanical stirring to complete water quality adjustment.
[0053] An electro-catalytic oxidation tank 200 is in communication with the wastewater conditioning tank 100. An electro-catalytic assembly electrode plate is arranged in the electro-catalytic oxidation tank 200 to decompose macromolecular organic matters in water into small molecular organic matters, improve the biodegradability of the wastewater, and oxidize cyanide (CN⁻) into cyanate (CNO⁻) with lower toxicity.
[0054] A coagulation and flocculation tank 300 is in communication with the electro-catalytic oxidation tank 200. Specifically, the coagulation and flocculation tank 300 includes a coagulation tank, a flocculation tank, and a sedimentation tank. A coagulant, polyaluminum chloride, is added in the coagulation tank, and a flocculant, polyacrylamide, is added in the flocculation tank.
[0055] The coagulant and the flocculant make heavy metal ions form insoluble hydroxides or complex precipitates.
[0056] An intermediate tank 400 is in communication with the coagulation and flocculation tank 300 to balance the inflow of subsequent tanks.
[0057] An ozone catalytic oxidation tower 500 is in communication with the intermediate tank 400. A catalyst filler is arranged in the ozone catalytic oxidation tower 500 to decompose ozone into •OH with stronger oxidation ability at normal temperature and pressure by using the catalyst, so as to oxidize macromolecular and refractory organic pollutants in water into small molecular organic matters, CO2 and H2O, further improve the biodegradability of the wastewater, and achieve the purpose of degrading pollutants. Meanwhile, cyanide is completely oxidized into harmless CO2 and H2O.
[0058] A hydrolysis acidification tank 600 is in communication with the ozone catalytic oxidation tower 500. Specifically, organic matters are hydrolyzed into small molecular acids to improve the biodegradability of the liquid.
[0059] An anoxic tank 700 is in communication with the hydrolysis acidification tank 600, and an aerobic tank 800 is in communication with the anoxic tank 700, which are respectively used for denitrification and nitrification of the liquid.
[0060] The aerobic tank 800 is in the form of multiple numbers, and the multiple aerobic tanks 800 are arranged in series. The series connection of the multiple aerobic tanks 800 prolongs the nitrification reaction time and improves the ammonia nitrogen removal rate. A biomimetic membrane reactor (MBR) membrane tank 900 is in communication with the aerobic tank 800, and adopts a membrane separation technology to realize efficient solid-liquid separation and guarantee the water quality of the effluent.
[0061] A drainage tank 910 is in communication with a drainage port of the MBR membrane tank 900. The drainage tank 910 is used for storing the drainage water.
[0062] Through the integrated process of electro-catalytic oxidation, ozone oxidation, hydrolytic acidification, biochemical treatment and MBR membrane separation, the complex hazardous waste liquid is efficiently degraded, so that the finally discharged water meets the discharge standard; through electro-catalytic oxidation and ozone oxidation, the large molecular and difficult-to-degrade organic matters are decomposed into small molecules, so that the efficiency of subsequent biochemical treatment is enhanced.
[0063] The discharge standard is formulated according to the first level standard of GB 8978-1996.
[0064] Please continue to refer to Figure 1 In the preferred embodiment, the drain tank 910 is provided with a drain pipe 911 and a backflow pipe 912, and the drain tank 910 is communicated with the electro-catalytic oxidation tank 200, the intermediate water tank 400 and the hydrolytic acidification tank 600 through the backflow pipe 912. Through the analysis of the water quality in the drain tank 910, according to the water quality, the liquid with unqualified water quality is backflowed to the electro-catalytic oxidation tank 200 or the intermediate water tank 400 or the first-stage anoxic tank 700 for reprocessing, so as to ensure that the wastewater meets the discharge standard, and the liquid with qualified water quality is discharged through the drain pipe 911.
[0065] Please continue to refer to Figure 1 The hazardous waste liquid treatment system further comprises an aeration fan 610, and the aeration fan 610 is communicated with the aeration pipes in the hydrolytic acidification tank 600 and the anoxic tank 700 through aeration air pipes. The hydrolytic acidification tank 600 and the anoxic tank 700 are provided with aeration pipes, which can be used as a standby aerobic tank 800, and the treatment direction is switched and selected according to the wastewater quality, so as to solve the problem that the hazardous waste liquid is complex in composition and difficult to treat.
[0066] Please continue to refer to Figure 1 In the preferred embodiment, the hazardous waste liquid treatment system further comprises a sand filter device 913, and the drain port of the MBR membrane tank 900 is communicated with the water inlet of the drain tank 910 through the sand filter device 913.
[0067] The sand filter device 913 further filters out the suspended solids remaining in the liquid, reducing the pollution of the MBR membrane in the subsequent process.
[0068] Please continue to refer to Figure 1 In some embodiments, the hazardous waste liquid treatment system further comprises an ozone generator 510, and the ozone generated by the ozone generator 510 is divided into two paths, one of which is transported to the ozone catalytic oxidation tower 500, and the other of which is transported to the sand filter device 913.
[0069] Please continue to refer to Figure 1The hazardous waste liquid treatment system further comprises an MBR cleaning water tank 930; the MBR cleaning water tank 930 is arranged on the top of the MBR membrane tank 900 and is used for cleaning the MBR membrane of the MBR membrane tank 900.
[0070] Please refer to Figure 2 The hazardous waste liquid treatment system further comprises a sludge concentration tank 920 which is communicated with the sludge discharge port of the coagulation and flocculation tank 300 and the sludge discharge port of the MBR membrane tank 900.
[0071] The hazardous waste liquid treatment system further comprises a plate filter press 940; the plate filter press 940 is communicated with the sludge discharge port of the sludge concentration tank 920; and the water discharge port of the plate filter press 940 is communicated with the wastewater conditioning tank 100.
[0072] In conclusion, the hazardous waste liquid treatment system comprises a wastewater conditioning tank 100 for collecting hazardous waste liquid, an electro-catalytic oxidation tank 200 communicated with the wastewater conditioning tank 100, a coagulation and flocculation tank 300 communicated with the electro-catalytic oxidation tank 200, an intermediate water tank 400 communicated with the coagulation and flocculation tank 300, an ozone catalytic oxidation tower 500 communicated with the intermediate water tank 400, a hydrolysis acidification tank 600 communicated with the ozone catalytic oxidation tower 500, an anoxic tank 700 communicated with the hydrolysis acidification tank 600, an aerobic tank 800 communicated with the anoxic tank 700, an MBR membrane tank 900 communicated with the aerobic tank 800, and a water discharge tank 910 communicated with the water discharge port of the MBR membrane tank 900.
[0073] Based on the above ideal embodiments of the present application, the related personnel can make various changes and modifications without deviating from the technical concept of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims
1. A hazardous waste liquid treatment system, characterized in that, include: Wastewater equalization tank (100) for collecting hazardous waste liquids; An electrocatalytic oxidation tank (200) is connected to the wastewater equalization tank (100); A coagulation and flocculation tank (300) is connected to the electrocatalytic oxidation tank (200); An intermediate water tank (400) is connected to the coagulation and flocculation tank (300); An ozone catalytic oxidation tower (500) is connected to the intermediate water tank (400); A hydrolysis acidification tank (600) is connected to the ozone catalytic oxidation tower (500); An anoxic tank (700) is connected to the hydrolysis acidification tank (600); An aerobic tank (800) is connected to the anoxic tank (700); The MBR membrane tank (900) is connected to the aerobic tank (800); A drain tank (910) is connected to the drain outlet of the MBR membrane tank (900).
2. The hazardous waste and wastewater treatment system as described in claim 1, characterized in that, The drain tank (910) is equipped with a drain pipe (911) and a return pipe (912). The drain tank (910) is connected to the electrocatalytic oxidation tank (200), the intermediate water tank (400) and the hydrolysis acidification tank (600) through the return pipe (912).
3. The hazardous waste and wastewater treatment system as described in claim 1, characterized in that, The hazardous waste liquid treatment system also includes an aeration fan (610). The aeration fan (610) is connected to the aeration pipes in the hydrolysis acidification tank (600) and the anoxic tank (700) through the aeration pipe.
4. The hazardous waste and waste liquid treatment system as described in claim 1, characterized in that, The hazardous waste liquid treatment system also includes a sand filter device (913). The drain outlet of the MBR membrane tank (900) is connected to the inlet of the drain tank (910) through the sand filter device (913).
5. The hazardous waste and waste liquid treatment system as described in claim 4, characterized in that, The hazardous waste liquid treatment system also includes an ozone generator (510). The ozone generated by the ozone generator (510) is divided into two paths: one path is sent to the ozone catalytic oxidation tower (500), and the other path is sent to the sand filter device (913).
6. The hazardous waste and waste liquid treatment system as described in claim 1, characterized in that, The hazardous waste liquid treatment system also includes an MBR cleaning water tank (930). The MBR cleaning water tank (930) is located on the top of the MBR membrane tank (900) and is used to clean the MBR membrane in the MBR membrane tank (900).
7. The hazardous waste and waste liquid treatment system as described in claim 1, characterized in that, The hazardous waste and waste liquid treatment system also includes: The sludge thickening tank (920) is connected to the sludge discharge port of the coagulation and flocculation tank (300) and the sludge discharge port of the MBR membrane tank (900).
8. The hazardous waste and waste liquid treatment system as described in claim 7, characterized in that, The hazardous waste and waste liquid treatment system also includes a plate filter press (940). The plate filter press (940) is connected to the sludge discharge port of the sludge thickening tank (920); The drain outlet of the plate filter press (940) is connected to the wastewater regulating tank (100).
9. The hazardous waste and waste liquid treatment system as described in claim 1, characterized in that, The number of aerobic tanks (800) is multiple; Multiple aerobic tanks (800) are connected in series.