Internal circulation treatment device for sewage treatment
By combining biological treatment and ozone catalytic treatment in an internal circulation system within the wastewater treatment device, the problem of poor ozone oxidation effect is solved, achieving efficient and environmentally friendly wastewater treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
- Filing Date
- 2025-03-31
- Publication Date
- 2026-04-21
AI Technical Summary
In existing wastewater treatment processes, the oxidation effect of ozone alone is slow and insufficient. Ozone has low solubility and stability in water, resulting in poor treatment effect and limiting its application.
Design an internal circulation treatment device that combines a biological treatment subsystem and an ozone catalytic treatment subsystem. Use a peristaltic pump to achieve the circulation of wastewater between the biological treatment container and the catalytic reaction column. Ozone in the catalytic reaction column decomposes organic matter, and combined with biodegradation treatment, a circulation treatment system is formed.
It improves wastewater treatment efficiency and effluent quality, reduces the generation of waste sludge and solid waste disposal costs, simplifies the treatment process, saves investment and operating costs and carbon dioxide emissions, and achieves green and environmentally friendly wastewater treatment.
Smart Images
Figure CN224147853U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of wastewater treatment technology, and specifically relates to an internal circulation treatment device for wastewater treatment. Background Technology
[0002] Currently, some wastewater treatment processes improve overall treatment efficiency by adding physicochemical methods to replace some biological treatment processes, such as chemical precipitation and advanced oxidation processes. However, excessive addition of chemical reagents in chemical precipitation increases sludge production and operating costs. Advanced oxidation processes can stimulate the reaction system to generate strong oxidizing free radicals, such as hydroxyl radicals, sulfate radicals, and peroxide radicals, further improving pollutant degradation and mineralization efficiency, while also enhancing the biodegradability of wastewater. Among these, ozone oxidation, due to its strong oxidizing power, can degrade complex macromolecular organic matter and has advantages over other advanced oxidation processes, including high degradation efficiency and less sludge accumulation. The utilization rate and dosage of ozone are generally proportional to degradation efficiency and operating costs, so some wastewater treatment processes choose pre- or post-ozone oxidation. However, the oxidation effect of ozone alone is slow and insufficient, and the low solubility and stability of ozone in water limit its application and prevent it from achieving the expected treatment effect. Utility Model Content
[0003] In view of the technical problems existing in the prior art, this utility model provides an internal circulation treatment device for sewage treatment, which solves the technical problems that ozone alone has a slow and insufficient oxidation effect and low solubility and stability in water, which cannot achieve the expected treatment effect and thus limits its application.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] This utility model provides an internal circulation treatment device for sewage treatment, including a biological treatment subsystem, a peristaltic pump and an ozone catalytic treatment subsystem;
[0006] The biological treatment subsystem is used to perform biodegradation treatment on the wastewater to remove nitrogen, phosphorus and biodegradable organic matter from the wastewater; the biological treatment subsystem includes a biological treatment container filled with activated sludge, and the wastewater to be treated is added into the biological treatment container.
[0007] The ozone catalytic treatment subsystem is used to catalytically decompose organic matter in the wastewater to be treated using active oxygen substances; the ozone catalytic treatment subsystem includes a catalytic reaction column, which is vertically arranged inside the biological treatment container;
[0008] The peristaltic pump is used to pump the wastewater in the biological treatment container into the catalytic reaction column; an overflow port is provided on the top side wall of the catalytic reaction column, and the overflow port is used to allow the wastewater in the catalytic reaction column to flow back into the biological treatment container.
[0009] Furthermore, the biological treatment subsystem also includes a biological aeration pump, a biological aeration head, and a hollow membrane module;
[0010] Both the biological aerator and the hollow membrane module are installed inside the biological treatment container and are positioned below the sewage level inside the container. The inlet of the biological aerator is connected to the outlet of the biological aeration pump, and the outlet of the hollow membrane module is connected to the inlet of the peristaltic pump via a first pipe.
[0011] Furthermore, the hollow membrane module is made of polyvinylidene fluoride hollow fiber membrane.
[0012] Furthermore, a water inlet is provided at the bottom of the side wall of the catalytic reaction column, and the water inlet of the catalytic reaction column is connected to the outlet of the peristaltic pump through a second pipe.
[0013] Furthermore, the ozone catalytic treatment subsystem also includes a catalytic aeration head and an ozone generator;
[0014] The catalytic aerator head is disposed inside the catalytic reaction column, and the inlet of the catalytic aerator head is connected to the outlet of the ozone generator; a catalyst is also disposed inside the catalytic reaction column.
[0015] Furthermore, the ozone generator operates synchronously with the peristaltic pump.
[0016] Furthermore, the catalytic reaction column is a hollow cylindrical reactor made of polymethyl methacrylate.
[0017] Furthermore, the biological aerator head is positioned near the bottom of the biological treatment container; the catalytic aerator head is located below the catalyst and near the bottom of the catalytic reaction column.
[0018] Furthermore, it also includes a membrane pressure gauge; the membrane pressure gauge is installed between the outlet end of the hollow membrane module and the inlet of the peristaltic pump, and the membrane pressure gauge is used to monitor the pressure value of the hollow membrane module.
[0019] Furthermore, the overflow outlet is located above the sewage level inside the biological treatment container.
[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0021] This utility model provides an internal circulation treatment device for wastewater treatment. The catalytic reaction column of the ozone catalytic treatment subsystem is placed within the biological treatment container of the biological treatment subsystem. A peristaltic pump and an overflow port on the catalytic reaction column enable wastewater to circulate back between the biological treatment container and the catalytic reaction column, connecting the biological treatment subsystem and the ozone catalytic treatment subsystem to form a circulation treatment system. This achieves synergy between the biological treatment process and the ozone catalytic process, effectively improving wastewater treatment efficiency and effluent quality. It effectively avoids the need for additional biological treatment processes, reduces the generation of waste sludge and solid waste disposal costs, making wastewater treatment more environmentally friendly. The device has a simple structure, simplifies the wastewater treatment process, occupies a small area, and saves on investment and operating costs as well as carbon dioxide emissions. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 The structural block diagram of the internal circulation treatment device for sewage treatment provided by this utility model.
[0024] The components include: 1. biological treatment container; 2. biological aeration pump; 3. biological aeration head; 4. hollow membrane module; 5. membrane pressure gauge; 6. peristaltic pump; 7. catalytic reaction column; 8. catalytic aeration head; 9. ozone generator; 10. overflow port; and 11. catalyst. Detailed Implementation
[0025] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0026] As attached Figure 1 As shown, this utility model provides an internal circulation treatment device for sewage treatment, including a biological treatment subsystem, a membrane pressure gauge 5, a peristaltic pump 6, and an ozone catalytic treatment subsystem.
[0027] The biological treatment subsystem is used to biodegrade the wastewater to remove nitrogen, phosphorus, and biodegradable organic matter. The ozone catalytic treatment subsystem is used to catalytically decompose the organic matter in the wastewater using active oxygen. The peristaltic pump 6 is used to pump the wastewater in the biological treatment container 1 of the biological treatment subsystem to the catalytic reaction column 7 of the ozone catalytic treatment subsystem. The overflow port 10 provided on the catalytic reaction column 7 is used to return the wastewater in the catalytic reaction column 7 to the biological treatment container 1.
[0028] The biological treatment subsystem includes a biological treatment container 1, a biological aeration pump 2, a biological aeration head 3, and a hollow membrane module 4. The biological treatment container 1 is filled with activated sludge. Preferably, the biological treatment container 1 is a polyethylene plastic bucket. The biological aeration pump 2 is located outside the biological treatment container 1, and the biological aeration head 3 and the hollow membrane module 4 are both located inside the biological treatment container 1 and below the sewage level. The inlet of the biological aeration head 3 is connected to the outlet of the biological aeration pump 2, and the outlet of the hollow membrane module 4 is connected to the inlet of the peristaltic pump 6 through a first pipe. Preferably, the biological aeration head 3 is located near the bottom of the biological treatment container 1. The hollow membrane module 4 is made of polyvinylidene fluoride hollow fiber membrane, and the outlet of the hollow membrane module 4 is located at the top of the hollow membrane module 4.
[0029] The membrane pressure gauge 5 is installed on the first pipe and positioned between the outlet end of the hollow membrane module 4 and the inlet of the peristaltic pump 6; wherein, the membrane pressure gauge 5 is used to monitor the pressure value of the hollow membrane module 4.
[0030] The ozone catalytic treatment subsystem includes a catalytic reaction column 7, a catalytic aeration head 8, and an ozone generator 9. The catalytic reaction column 7 is a hollow cylindrical reactor. Preferably, the catalytic reaction column 7 is a hollow cylindrical reactor made of polymethyl methacrylate. The catalytic reaction column 7 is vertically arranged inside the biological treatment container 1. An inlet is provided at the bottom end of the side wall of the catalytic reaction column 7, and an overflow port 10 is provided at the top end of the side wall of the catalytic reaction column 7. The inlet of the catalytic reaction column 7 is connected to the outlet of the peristaltic pump 6 through a second pipe. One side of the overflow port 10 is connected to the inner cavity of the catalytic reaction column 7, and the other end of the overflow port is connected to the interior of the biological treatment container 1. The overflow port 10 is located above the sewage surface in the biological treatment container 1 and below the sewage surface in the catalytic reaction column 7.
[0031] The catalytic aeration head 8 is disposed inside the catalytic reaction column 7 and near the bottom end of the catalytic reaction column 7; the inlet of the catalytic aeration head 8 is connected to the outlet of the ozone generator 9, and the ozone generator 9 operates synchronously with the peristaltic pump 6; a catalyst 11 is also disposed inside the catalytic reaction column 7, and the catalyst 11 is located above the catalytic aeration head 8; wherein, the catalyst 11 is a homogeneous catalyst or a heterogeneous catalyst, and the type of catalyst 11 is determined according to the wastewater to be treated.
[0032] Equipment Dimensional Features Description:
[0033] Taking a wastewater treatment device as an example, the equipment dimensions of the internal circulation treatment device for wastewater treatment are described in detail below:
[0034] The biological treatment container 1 is a polyethylene plastic drum with an effective volume of 50L; the polyvinylidene fluoride hollow fiber membrane has an average pore size of 0.1µm and a total effective area of 0.35m². 2 The diameter of the catalytic reaction column 7 is 10cm, the height is 22cm, and the effective volume is 2500mL.
[0035] Working principle:
[0036] The internal circulation treatment device for sewage treatment described in this utility model operates as follows:
[0037] The wastewater to be treated is added to biological treatment container 1, and biological aeration pump 2 is started to aerate the container, initiating the biodegradation of the wastewater. During aeration, the aerobic aeration time is 3.5 hours, and the anaerobic aeration time is 2.5 hours. Simultaneously, peristaltic pump 6 and ozone generator 9 are started to pump the wastewater from biological treatment container 1 into catalytic reaction column 7, initiating ozone catalytic decomposition. Peristaltic pump 6 and ozone generator 9 operate synchronously, using a 5-minute on / 5-minute off cycle. The ozone intensity generated by ozone generator 9 is 10 g (O3)·h⁻¹. -1 Inside the catalytic reaction column 7, the wastewater that has undergone ozone catalytic decomposition flows back to the biological treatment container 1 through the overflow port 10, thus completing one cycle. When the number of cycles reaches the preset number or the wastewater meets the discharge standard, the water in the biological treatment container 1 is discharged into the preset water storage container to complete the treatment of the wastewater.
[0038] The internal circulation treatment system for wastewater treatment described in this invention involves the wastewater first entering the biological treatment subsystem during operation. Initial biodegradation occurs within the biological treatment container, where aeration is performed by a biological aeration pump at a rate of 3.5 hours for aerobic processes followed by 2.5 hours for anaerobic processes. Subsequently, a hollow membrane module and a peristaltic pump work together to guide the wastewater into the catalytic reaction column through its inlet. The water level within the catalytic reaction column gradually rises as the reaction progresses. Finally, the wastewater flows back into the biological treatment container through the overflow outlet of the catalytic reaction column, completing one cycle. Ozone within the catalytic reaction column is generated by an ozone generator and enters the column through catalytic aeration heads, with ozone aeration and water inflow occurring simultaneously. The catalyst within the catalytic reaction column is selected based on the type of wastewater being treated, using appropriate packing material.
[0039] In this invention, a pressure gauge monitors the pressure value of the hollow membrane module. When the pressure value of the hollow membrane module exceeds 0.03 MPa, the hollow membrane module is cleaned with clean water to remove the filter cake layer adhering to its surface. It should be noted that chemical cleaning of the hollow membrane module is performed during the start-up or end-of-operation phases of the device. The steps for chemical cleaning of the hollow membrane module are as follows:
[0040] First, the filter cake layer on the surface of the hollow membrane module is removed by physical rinsing; backwashing may be performed as needed during physical rinsing. Next, the physically cleaned hollow membrane module is completely immersed in a hydrochloric acid solution with pH=2 for 4 hours, and then rinsed thoroughly with tap water. Afterwards, a 0.5 g·L⁻¹ solution is prepared. -1 Concentration of sodium hydroxide solution and 5 mL·L -1 The membrane module was soaked in a sodium hypochlorite solution mixture for 2 hours, and then rinsed with clean water after soaking.
[0041] In this invention, activated sludge is placed inside a biological treatment container. The outlet end of the hollow membrane module is connected to a membrane pressure gauge and a peristaltic pump. The biological treatment subsystem and the ozone catalytic treatment subsystem are connected through the peristaltic pump and the overflow port. The biological treatment subsystem mainly removes nitrogen and phosphorus from wastewater and removes biodegradable organic matter. The ozone catalytic treatment subsystem generates a large amount of active oxygen (ROS) to convert recalcitrant large-molecule organic matter in wastewater into small-molecule organic matter, or directly mineralizes it into CO2 and H2O, effectively improving the biodegradability and treatment efficiency of wastewater.
[0042] The internal circulation treatment device described in this utility model has a simple structure, simplifies the wastewater treatment process, occupies a small area, and saves on investment and operating costs as well as carbon dioxide emissions. Specifically, the combination of a biological treatment subsystem and an ozone catalytic process improves pollutant treatment efficiency and effluent quality, effectively avoiding the need for additional biological treatment processes, reducing the generation of waste sludge and solid waste disposal costs, and making wastewater treatment more environmentally friendly. The catalyst in the catalytic reaction column can be selected according to the type of wastewater being treated, improving treatment flexibility. Furthermore, the methane and other biogas produced by the biological treatment subsystem in the anaerobic stage not only improve energy recovery and utilization rates but also reduce sludge production.
[0043] The above embodiments are merely one of the implementation methods to achieve the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model.
Claims
1. An internal circulation treatment device for wastewater treatment, characterized in that, It includes a biological treatment subsystem, a peristaltic pump (6), and an ozone catalytic treatment subsystem; The biological treatment subsystem is used to perform biodegradation treatment on the wastewater to remove nitrogen, phosphorus and biodegradable organic matter from the wastewater; the biological treatment subsystem includes a biological treatment container (1), which is filled with activated sludge, and the wastewater to be treated is added into the biological treatment container (1). The ozone catalytic treatment subsystem is used to catalytically decompose organic matter in the wastewater to be treated using active oxygen substances; the ozone catalytic treatment subsystem includes a catalytic reaction column (7), which is vertically arranged inside the biological treatment container (1); The peristaltic pump (6) is used to pump the sewage in the biological treatment container (1) into the catalytic reaction column (7); an overflow port (10) is provided on the top side wall of the catalytic reaction column (7), and the overflow port (10) is used to allow the sewage in the catalytic reaction column (7) to flow back into the biological treatment container (1).
2. The internal-circulation treatment device for sewage treatment according to claim 1, wherein The biological treatment subsystem also includes a biological aeration pump (2), a biological aeration head (3), and a hollow membrane module (4). The biological aeration head (3) and the hollow membrane module (4) are both installed inside the biological treatment container (1) and are both positioned below the sewage surface inside the biological treatment container (1); wherein, the inlet of the biological aeration head (3) is connected to the outlet of the biological aeration pump (2), and the outlet of the hollow membrane module (4) is connected to the inlet of the peristaltic pump (6) through a first pipe.
3. The internal-circulation treatment device for sewage treatment according to claim 2, characterized by The hollow membrane module (4) is made of polyvinylidene fluoride hollow fiber membrane.
4. The internal-circulation treatment device for sewage treatment according to claim 2, characterized by The bottom of the side wall of the catalytic reaction column (7) is provided with a water inlet, and the water inlet of the catalytic reaction column (7) is connected to the outlet of the peristaltic pump (6) through a second pipe.
5. The internal-circulation treatment device for sewage treatment according to claim 2, characterized by The ozone catalytic treatment subsystem also includes a catalytic aeration head (8) and an ozone generator (9). The catalytic aeration head (8) is disposed inside the catalytic reaction column (7), and the inlet of the catalytic aeration head (8) is connected to the outlet of the ozone generator (9); a catalyst (11) is also disposed inside the catalytic reaction column (7).
6. An internal-circulation treatment device for sewage treatment according to claim 5, wherein The ozone generator (9) operates synchronously with the peristaltic pump (6).
7. The internal-circulation treatment device for sewage treatment according to claim 5, wherein The catalytic reaction column (7) is a hollow cylindrical reactor made of polymethyl methacrylate.
8. The internal-circulation treatment device for sewage treatment according to claim 5, characterized by The biological aeration head (3) is located near the bottom of the biological treatment container (1); the catalytic aeration head (8) is located below the catalyst (11) and near the bottom of the catalytic reaction column (7).
9. The internal-circulation treatment device for sewage treatment according to claim 2, characterized by It also includes a membrane pressure gauge (5); the membrane pressure gauge (5) is set between the outlet end of the hollow membrane module (4) and the inlet of the peristaltic pump (6), and the membrane pressure gauge (5) is used to monitor the pressure value of the hollow membrane module (4).
10. The internal-circulation treatment device for sewage treatment according to claim 1, wherein The overflow port (10) is located above the sewage surface inside the biological treatment container (1).