Sewage treatment and resource utilization integrated device

Abstract

The utility model relates to the technical field of rural sewage treatment and resource utilization, in particular to a sewage treatment and resource utilization integrated device. Comprising an anaerobic filter tank, a membrane aeration treatment tank, a nitrification tank, a sedimentation tank and a clear water disinfection tank which are sequentially communicated through pipelines, a first valve is arranged on the pipeline for communicating the anaerobic filter tank with the membrane aeration treatment tank, and a second valve is arranged on the pipeline for communicating the membrane aeration treatment tank with the nitrification tank; a third valve is arranged on a pipeline for communicating the nitrification tank with the sedimentation tank; and the tail ends of the anaerobic filter tank, the membrane aeration treatment tank and the nitrification tank are respectively provided with a water intake. According to the integrated device provided by the utility model, the resource utilization efficiency of rural domestic sewage can be improved, and rural domestic sewage treatment and resource utilization are fully combined.

Description

Technical Field

[0001] The utility model relates to the technical field of rural sewage treatment and resource utilization, in particular to an integrated device for sewage treatment and resource utilization. Background Art

[0002] Rural domestic sewage treatment is of great significance for improving the quality of rural ecological environment, filling the gaps in rural living environment, and promoting the construction of beautiful villages. Sewage resource utilization refers to the use of sewage as recycled water to replace conventional water sources after it has been harmlessly treated to meet specific water quality standards. It is used for industrial production, municipal miscellaneous uses, ecological water replenishment, and agricultural irrigation, etc. It is of great significance to promote intensive conservation of water resources, energy conservation, and carbon reduction. Rural domestic sewage has the characteristics of high content of organic pollutants. Unlike urban industrial sewage, it almost does not involve the introduction of toxic and harmful substances, so it has good potential for resource utilization. At present, rural domestic sewage treatment still has the problem of low resource utilization efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide an integrated device for sewage treatment and resource utilization, which can improve the resource utilization efficiency of rural domestic sewage and fully combine rural domestic sewage treatment and resource utilization.

[0004] The utility model provides an integrated device for sewage treatment and resource utilization, comprising an anaerobic filter, a membrane aeration treatment tank, a nitrification tank, a sedimentation tank and a clean water disinfection tank which are sequentially connected through pipelines, a first valve is arranged on the pipeline connecting the anaerobic filter and the membrane aeration treatment tank, a second valve is arranged on the pipeline connecting the membrane aeration treatment tank and the nitrification tank, and a third valve is arranged on the pipeline connecting the nitrification tank and the sedimentation tank; and water intakes are arranged at the ends of the anaerobic filter, the membrane aeration treatment tank and the nitrification tank.

[0005] Furthermore, a water intake pipe is provided at the water intake port, and a valve is provided on the water intake pipe.

[0006] Furthermore, a return pipe is provided between the sedimentation tank and the anaerobic filter tank.

[0007] Furthermore, a MABR membrane assembly is provided inside the membrane aeration treatment tank.

[0008] Furthermore, an anaerobic filler is provided in the anaerobic filter.

[0009] Furthermore, the filling rate of the anaerobic filler in the anaerobic filter is not less than 30%.

[0010] Furthermore, a hanging filler is provided in the nitrification tank.

[0011] Furthermore, the filling rate of the hanging filler in the nitrification tank is not less than 50%.

[0012] Furthermore, a water inlet is provided at the front end of the anaerobic filter.

[0013] Furthermore, a water outlet is provided at the end of the clean water disinfection tank.

[0014] In summary, compared with the prior art, the utility model has the following advantages:

[0015] The technical solution provided by the utility model treats sewage through the anaerobic filter, membrane aeration treatment tank, nitrification tank, sedimentation tank and clean water disinfection tank; by controlling the opening and closing of the first valve, the second valve, the third valve and the water intake of the anaerobic filter, the membrane aeration treatment tank and the nitrification tank, the purpose of flexible resource utilization of different nutrient sewage can be achieved, and sewage resource reuse in different scenarios can be adapted. Through the precise reuse mode control of the staged sub-tank body, it can meet the reuse conditions in different scenarios and ensure that the nutrients in the water will not be excessively removed and reduced; it can also reduce the sewage treatment process, save the energy consumption required for sewage treatment, save resources, and achieve the treatment of rural sewage from the two aspects of resource utilization and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the integrated sewage treatment and resource recovery treatment device in the embodiment of the utility model.

[0018] Explanation of the reference numerals: 1- anaerobic filter; 2- membrane aeration treatment tank; 3- nitrification tank; 4- sedimentation tank; 5- clean water disinfection tank; 6- first valve; 7- second valve; 8- third valve; 9- reflux pipe; 10- water intake; 11- water inlet; 12- water outlet. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] Example

[0023] An integrated device for sewage treatment and resource utilization, such as Figure 1 As shown, it includes an anaerobic filter 1, a membrane aeration treatment tank 2, a nitrification tank 3, a sedimentation tank 4, and a clean water disinfection tank 5 which are sequentially connected through pipelines. A first valve 6 is installed on the pipeline connecting the anaerobic filter 1 and the membrane aeration treatment tank 2, a second valve 7 is installed on the pipeline connecting the membrane aeration treatment tank 2 and the nitrification tank 3, and a third valve 8 is installed on the pipeline connecting the nitrification tank 3 and the sedimentation tank 4; water intakes 10 are provided at the ends of the anaerobic filter 1, the membrane aeration treatment tank 2 and the nitrification tank 3, and a water intake pipe with a valve is installed at the water intake 10.

[0024] The front end of the anaerobic filter 1 is provided with a water inlet 11, which is the entrance for rural domestic sewage to flow into the device; the end of the clean water disinfection tank 5 is provided with a water outlet 12, which is the outlet for the treated water to flow out of the device. Pipes are installed at the water inlet 11 and the water outlet 12.

[0025] A return pipe 9 is provided between the sedimentation tank 4 and the anaerobic filter 1. A return pump is installed on the return pipe 9. The inlet of the return pipe 9 is located in the sedimentation tank 4, and the outlet of the return pipe 9 is located in the anaerobic filter 1. A part of the sludge in the sedimentation tank 4 is returned to the anaerobic filter 1 through the return pipe 9 to continue to participate in the anaerobic treatment and maintain the concentration of active sludge in the system, thereby ensuring the high efficiency of the anaerobic treatment process. The other part is discharged from the device in the form of residual sludge.

[0026] The anaerobic filter 1 is filled with anaerobic fillers, with a filling rate of not less than 30%, and uses anaerobic bacteria to remove organic matter in wastewater. Conventional biological fillers in the art, such as elastic solid fillers, can be used.

[0027] A MABR membrane assembly is placed in the membrane aeration treatment tank 2, and fillers are hung beside the MABR membrane assembly (suspended fillers are set to increase biomass and enhance denitrification). The MABR process is used to aerate the sewage. The MABR process has a unique aerobic-anoxic biofilm layered structure, which can couple autotrophic nitrifying bacteria and heterotrophic denitrifying bacteria at different levels of the biofilm to achieve simultaneous nitrification and denitrification, and remove COD and ammonia nitrogen in the sewage.

[0028] The nitrification tank 3 is filled with suspended fillers, and the filling rate of the suspended fillers is not less than 50%. The suspended fillers in this embodiment can be the suspended fillers conventionally used in the art. The suspended fillers are added to the nitrification tank 3 to provide a substrate for microorganisms (such as nitrifying bacteria) to attach and grow, forming a composite system in which biofilm and activated sludge coexist, and achieving the purpose of increasing biomass and shortening sludge age without increasing the tank capacity.

[0029] The clean water disinfection tank 5 can be carried out by using a chlorine disinfection process, an ozone disinfection process or an ultraviolet disinfection process to kill pathogens, degrade organic matter and oxidize remaining pollutants.

[0030] The integrated device provided by the utility model controls the opening and closing of three water intakes 10, the first valve 6, the second valve 7, the third valve 8 and the device outlet 12 to control the direction of water flow, and can flexibly use water from different pools and different treatment stages (i.e., containing different amounts of nutrients), adapt to the use of water resources in various scenarios, and meet the needs of different scenarios. The valves on the water intake pipe and the first valve, the second valve, and the third valve can be connected to the controller, and each valve can be controlled by the controller to more accurately use water from different pools.

[0031] The method of using the integrated sewage treatment and resource utilization device provided by the utility model is as follows: rural domestic sewage is introduced into the anaerobic filter 1 through the water inlet 11, and anaerobic microorganisms are used to degrade organic matter into simpler organic compounds; the sewage after anaerobic treatment enters the membrane aeration treatment tank 2 through a pipeline for nitrification and denitrification treatment to remove COD, ammonia nitrogen, total nitrogen and total phosphorus; then enters the nitrification tank 3 for deep nitrification treatment to further remove COD and reduce the ammonia nitrogen content; then enters the sedimentation tank 4 to remove suspended matter in the water, and finally enters the clean water disinfection tank 5 for disinfection treatment to complete the sewage treatment.

[0032] The effluent of the anaerobic filter 1 can meet the irrigation needs. When the water of the anaerobic filter 1 is reused, the opening of the first valve 6 is reduced to reduce the flow rate into the subsequent tanks, the water intake 10 on the anaerobic filter 1 is opened, and the water intakes 10 on the membrane aeration treatment tank 2 and the nitrification tank 3 are closed.

[0033] The effluent of the membrane aeration treatment tank 2 removes COD, ammonia nitrogen, total nitrogen and total phosphorus based on simultaneous nitrification and denitrification, and the effluent can meet the water use standard required by Landmark Level 1 B. When reusing the water of the membrane aeration treatment tank 2, reduce the opening of the second valve 7 to reduce the flow rate into the subsequent tanks, open the water intake 10 on the membrane aeration treatment tank 2, and close the water intake 10 on the anaerobic filter 1 and the nitrification tank 3.

[0034] The effluent COD and ammonia nitrogen content of the nitrification tank 3 are lower and can be used for water with higher standards. When the water of the nitrification tank 3 is reused, the opening of the third valve 8 is reduced to reduce the flow rate into the subsequent tanks, the water intake 10 on the nitrification tank 3 is opened, and the water intake 10 on the anaerobic filter 1 and the membrane aeration treatment tank 2 are closed.

[0035] The water discharged from the outlet 12 at the end of the clean water disinfection tank 5 can meet the water use standard required by Landmark Level A. When the reuse device discharges water, all water intakes 10 are closed, and the first valve 6, the second valve 7 and the third valve 8 are opened normally.

[0036] The utility model provides an integrated sewage treatment and resource utilization device, which realizes resource utilization while treating rural sewage. At the same time, through the precise control of water flow, water in unused pools can be taken for use in time to avoid water flowing to the next pool, thus avoiding the loss of organic nutrients in the water due to continued treatment. Through the precise control of water flow, the water can be discharged early, shortening the treatment process, reducing the power consumption and drug consumption of the entire treatment process, and saving energy.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An integrated device for sewage treatment and resource utilization, characterized in that: The invention comprises an anaerobic filter (1), a membrane aeration treatment tank (2), a nitrification tank (3), a sedimentation tank (4), and a clean water disinfection tank (5) which are sequentially connected through pipelines. A first valve (6) is provided on the pipeline connecting the anaerobic filter (1) and the membrane aeration treatment tank (2), a second valve (7) is provided on the pipeline connecting the membrane aeration treatment tank (2) and the nitrification tank (3), and a third valve (8) is provided on the pipeline connecting the nitrification tank (3) and the sedimentation tank (4); and water intakes (10) are provided at the ends of the anaerobic filter (1), the membrane aeration treatment tank (2), and the nitrification tank (3).

2. The device according to claim 1, characterized in that A water intake pipe is provided at the water intake port (10), and a valve is provided on the water intake pipe.

3. The device according to claim 1, characterized in that A return pipe (9) is provided between the sedimentation tank (4) and the anaerobic filter tank (1).

4. The device according to claim 1, characterized in that A MABR membrane module is arranged inside the membrane aeration treatment tank (2).

5. The device according to claim 1, characterized in that The anaerobic filter (1) is provided with anaerobic fillers.

6. The device according to claim 5, characterized in that The filling rate of the anaerobic filler in the anaerobic filter (1) is not less than 30%.

7. The device according to claim 1, characterized in that The nitrification tank (3) is provided with a suspended filler.

8. The device according to claim 7, characterized in that The filling rate of the suspended filler in the nitrification tank (3) is not less than 50%.

9. The device according to claim 1, characterized in that The front end of the anaerobic filter (1) is provided with a water inlet (11).

10. The device according to claim 1, characterized in that A water outlet (12) is provided at the end of the clean water disinfection tank (5).

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