Sewage treatment device
By connecting the side-flow fermentation zone and the second hypoxia zone in the sewage treatment device, combining the side-flow fermentation to strengthen the biological phosphorus removal and short-range denitrification coupled anaerobic ammonia oxidation process, the problem of poor treatment effect of high-phosphorus and high-ammonia nitrogen is solved, and deep treatment with low carbon and low energy consumption is achieved.
Patent Information
- Application Number
- CN202422393272.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-09-30
AI Technical Summary
The existing sewage treatment devices have poor effects on domestic sewage treatment with high phosphorus and high ammonia nitrogen, and require additional carbon sources to be added to increase operating costs, while generating a large amount of residual sludge, resulting in high energy consumption.
By setting up a side-flow fermentation zone and a second hypoxia zone, tandem side-flow fermentation strengthens the biological phosphorus removal process and short-range denitrification coupled anaerobic ammonia oxidation process, using an endogenous carbon source to achieve deep treatment of high-phosphorus and high-ammonia nitrogen wastewater, reducing carbon source injection and reducing energy consumption.
It realizes the deep treatment of domestic sewage with high phosphorus and high ammonia nitrogen, saves carbon source injection, reduces operating costs, reduces the generation of residual sludge, and achieves a low-energy treatment effect.
Smart Images
Figure CN223292369U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of sewage treatment, and in particular relates to a sewage treatment device. Background Art
[0002] Existing sewage treatment processes, due to the relatively low C / P and C / N ratios of the influent, lead to competition for carbon sources among functional microorganisms. For example, phosphate-accumulating bacteria need to use the influent carbon source to synthesize an internal carbon source in the anaerobic stage, and then use the internal carbon source synthesized in the anaerobic stage to fully and excessively absorb phosphorus in the aerobic stage. Denitrifying bacteria also need to use the influent carbon source in the anoxic stage to perform denitrification and denitrification. However, the low influent carbon source prevents the functional microorganisms from fully exerting their functions, making it impossible to achieve deep treatment of domestic sewage with high phosphorus and high ammonia nitrogen content. Adding a carbon source increases operating costs. Furthermore, traditional sewage treatment processes produce a large amount of excess sludge, and sludge treatment also increases operating costs. Utility Model Content
[0003] The details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent.
[0004] The utility model proposes a sewage treatment device, which solves the technical problem that the existing sewage treatment devices have poor treatment effect on high-phosphorus and high-ammonia nitrogen domestic sewage, and has the characteristics of being able to deeply remove high-phosphorus and high-ammonia nitrogen in domestic sewage in a low-carbon and low-energy consumption form.
[0005] The utility model discloses a sewage treatment device, comprising an anaerobic zone, an anoxic zone, an aerobic zone, a sedimentation tank, a side stream fermentation zone, and a second anoxic zone; an inlet of the anoxic zone is connected to an outlet of the anaerobic zone; an inlet of the aerobic zone is connected to an outlet of the anoxic zone, an outlet of the aerobic zone is connected to another inlet of the anoxic zone; an inlet of the sedimentation tank is connected to another outlet of the aerobic zone; an inlet of the side stream fermentation zone is connected to a bottom outlet of the sedimentation tank, and the outlet of the side stream fermentation zone is connected to an inlet of the anaerobic zone; and an inlet of the second anoxic zone is connected to a top outlet of the sedimentation tank.
[0006] In some embodiments, the bottom outlet of the sedimentation tank is connected to an inlet of the anaerobic zone.
[0007] In some embodiments, a water inlet tank is further included, and the water inlet tank is connected to another inlet of the anaerobic zone through a water inlet pipe, and the water inlet pipe is provided with a water inlet pump.
[0008] In some embodiments, a water outlet tank is further included, wherein the water outlet tank inlet is connected to the outlet of the second anoxic zone.
[0009] In some embodiments, the bottom outlet of the sedimentation tank is connected to an inlet of the anaerobic zone through a sludge return pipe, and the inlet and outlet of the side stream fermentation zone are both connected to the sludge return pipe through a side stream sludge return pipe.
[0010] In some embodiments, both the sludge return pipe and the side stream sludge return pipe are provided with a sludge pump.
[0011] In some embodiments, one outlet of the aerobic zone is connected to another inlet of the anoxic zone through a nitrification liquid reflux pipe, and the nitrification liquid reflux pipe, the pipe connecting the sedimentation tank inlet and the other outlet of the aerobic zone, and the pipe connecting the outlet water tank inlet and the outlet of the second anoxic zone are all provided with water pumps.
[0012] In some embodiments, the method further comprises an air pump connected to the aerobic zone for aerating the aerobic zone, and a flow meter is provided on the pipeline connecting the air pump and the aerobic zone.
[0013] In some embodiments, a stirring blade is further included for stirring the sewage in the anoxic zone.
[0014] In some embodiments, fillers and wave makers are provided in the second anoxic zone.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] The utility model provides a sewage treatment device. By setting a side stream fermentation area and a second anoxic area and limiting the connectivity between the areas, a side stream fermentation enhanced biological phosphorus removal process (S2EBPR) and a short-range denitrification coupled anaerobic ammonia oxidation process (PN / A) are connected in series, and the advantages of each are complemented to achieve deep treatment of high-phosphorus and high-ammonia nitrogen domestic sewage, saving the addition of carbon source, flexible operation, energy saving and consumption reduction, and lowering operating costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:
[0018] Figure 1 A schematic structural diagram of a sewage treatment device provided by an embodiment of the present utility model;
[0019] In the above figures: 1. Anaerobic zone; 2. Anoxic zone; 3. Aerobic zone; 4. Sedimentation tank; 5. Side stream fermentation zone; 6. Second anoxic zone; 7. Water inlet tank; 8. Water outlet tank. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0021] The present invention provides a sewage treatment device. Figure 1 Schematic diagram of the structure of the sewage treatment device according to the embodiment of the present utility model. Figure 1 As shown, the device includes at least an anaerobic zone 1, an anoxic zone 2, an aerobic zone 3, a sedimentation tank 4, a sidestream fermentation zone 5, and a second anoxic zone 6. An inlet of the anoxic zone 2 is connected to an outlet of the anaerobic zone 1; an inlet of the aerobic zone 3 is connected to an outlet of the anoxic zone 2, and an outlet of the aerobic zone 3 is connected to another inlet of the anoxic zone 2; an inlet of the sedimentation tank 4 is connected to another outlet of the aerobic zone 3; an inlet of the sidestream fermentation zone 5 is connected to the bottom outlet of the sedimentation tank 4, and an outlet of the sidestream fermentation zone 5 is connected to an inlet of the anaerobic zone 1; and an inlet of the second anoxic zone 6 is connected to a top outlet of the sedimentation tank 4. Furthermore, the bottom outlet of the sedimentation tank 4 is connected to an inlet of the anaerobic zone 1. The sewage treatment device is provided with a side stream fermentation zone 5 and a second anoxic zone 6, and at the same time, by limiting the connectivity between the various zones, connects the side stream fermentation enhanced biological phosphorus removal process (S2EBPR) and the short-range denitrification coupled anaerobic ammonia oxidation process (PN / A) in series, complementing the advantages of each, and realizing deep treatment of high-phosphorus and high-ammonia nitrogen domestic sewage in a low-carbon form, saving the addition of carbon sources, being flexible in operation, and being able to achieve energy conservation and consumption reduction, thereby reducing operating costs, and solving the problem of low efficiency of traditional sewage treatment processes and high energy consumption due to the need for external carbon sources.
[0022] The above-described device achieves deep treatment of high-phosphorus and high-ammonia nitrogen wastewater in a low-carbon manner by combining a sidestream fermentation-enhanced biological phosphorus removal system with anaerobic ammonium oxidation (ANAOM) coupled to an endogenous short-cut denitrification system. The VFAs produced by the sidestream fermentation during the enhanced biological phosphorus removal phase are used by PAOs. This abundant carbon source prevents carbon competition between PAOs and denitrifying bacteria, eliminating the need for additional carbon source addition. The resulting excess sludge is fully utilized, with some returned to the anaerobic zone 1 and some to the sidestream fermentation zone 5, eliminating the need for sludge treatment and reducing energy consumption. The microorganisms in the MBBR in the second anoxic zone 6 do not require additional carbon source additions. Endogenous short-cut denitrification requires a relatively small carbon source, which is sufficient to be met by the influent from the previous stage. Furthermore, the ANAOM-oxidizing microorganisms are autotrophic and do not require additional carbon source additions. Furthermore, the MBBR operation mode eliminates the need for sludge treatment and achieves efficient deep denitrification. The series combination of the S2EBPR process and the PN / A process achieves the efficient treatment of high-phosphorus and high-ammonia nitrogen domestic sewage in a low-carbon form.
[0023] Furthermore, it includes a water inlet tank 7, which is connected to another inlet of the anaerobic zone 1 through an inlet pipe, and a water inlet pump is provided on the inlet pipe. In some embodiments, it also includes a water outlet tank 8, the inlet of which is connected to the outlet of the second anoxic zone 6.
[0024] In some embodiments, the bottom outlet of the sedimentation tank 4 is connected to the inlet of the anaerobic zone 1 through a sludge return pipe, and the inlet and outlet of the sidestream fermentation zone 5 are both connected to the sludge return pipe through the sidestream sludge return pipe. In some embodiments, a sludge return pipe and the sidestream sludge return pipe are both provided with a sludge pump. In some embodiments, an outlet of the aerobic zone 3 is connected to another inlet of the anoxic zone 2 through a nitrification liquid return pipe, and a water pump is provided on the nitrification liquid return pipe, the pipe connecting the inlet of the sedimentation tank 4 and another outlet of the aerobic zone 3, and the pipe connecting the inlet of the water tank 8 and the outlet of the second anoxic zone 6. In some embodiments, an air pump connected to the aerobic zone 3 for aerating the aerobic zone 3 is also included, and a flow meter is provided on the pipe connecting the air pump and the aerobic zone 3. Furthermore, a stirring paddle for stirring the sewage in the anoxic zone 2 is also included. Filling and a wave maker are provided in the second anoxic zone 6.
[0025] The above-mentioned device for achieving deep treatment of high-phosphorus and high-ammonia nitrogen sewage in domestic sewage in a low-carbon form by connecting a sidestream fermentation-enhanced biological phosphorus removal system in series with an anaerobic ammonium oxidation coupled endogenous short-range denitrification system is suitable for the treatment of domestic sewage in current sewage treatment plants, rural sewage treatment base stations, community sewage treatment stations, and other domestic sewage, as well as the upgrading and transformation of equipment. It can deeply treat high-phosphorus and high-ammonia nitrogen domestic sewage. It only needs to add a sidestream fermentation zone 5 and a second anoxic zone 6 on the basis of the existing sewage treatment device. The operation is simple and can effectively save investment. Among them, the S2EBPR device can achieve deep removal of phosphorus in the influent. The sidestream fermentation device provides sufficient carbon source for the mainstream system, allowing the polyphosphate bacteria to fully play the role of phosphorus removal and at the same time remove most of the high ammonia nitrogen in the influent. The residual sludge produced by the mainstream device can enter the sidestream device for anaerobic fermentation to supplement the carbon source of the mainstream device influent. As a new type of biological denitrification process, the PN / A process has a low demand for carbon sources in short-term denitrification. At the same time, the nitrite nitrogen produced by short-term denitrification can serve as an electron acceptor for anaerobic ammonia-oxidizing bacteria, directly converting nitrite nitrogen and ammonia nitrogen in sewage into nitrogen gas. The application of biological fillers allows functional microorganisms to grow as biofilms, avoiding the loss of functional microorganisms and the generation of excess sludge, saving energy. Therefore, the series application of the two devices can effectively achieve deep treatment of high-phosphorus and high-ammonia nitrogen domestic sewage in a low-carbon form. For the renovation and upgrading of current sewage treatment plants, it is only necessary to add a side stream fermentation device and a second anoxic zone 6 on the original basis.
[0026] The working process of the above sewage treatment device is as follows:
[0027] First, the influent enters the anaerobic zone 1 from the inlet tank 7 through the inlet pipe and inlet pump. Simultaneously, the fermentation broth in the sidestream fermentation zone 5 is also discharged into the anaerobic zone 1. During this stage, the phosphate-accumulating bacteria utilize the carbon source in the influent and the fermentation zone to store internal carbon sources and synthesize PHA. The influent and the reflux nitrification liquid then enter the anoxic zone 2 for denitrification. The influent then enters the aerobic zone 3. The phosphate-accumulating bacteria utilize the internal carbon source synthesized in the anaerobic zone 1 to aerobically absorb excess phosphorus, achieving deep phosphorus removal. Simultaneously, the nitrifying microorganisms convert ammonia nitrogen in the influent into nitrite and nitrate nitrogen. The treated influent enters the sedimentation tank 4 via the inlet pump. The remaining sludge is fully utilized. Part of the settled sludge enters the anaerobic zone 1 through the sludge return pipe, while part enters the sidestream fermentation zone 5 through the sidestream sludge return pipe. Hydrolysis and fermentation produce VFAs, which are then used by the phosphate-accumulating bacteria in the anaerobic zone 1. The influent of the second anoxic zone 6 undergoes deep denitrification through short-range denitrification and anaerobic ammonium oxidation by biofilm-forming microorganisms on the MBBR, without generating excess sludge. The treated water is pumped into the outlet tank 8 and subsequently discharged.
[0028] The test objects were sewage treatment plants and rural domestic sewage treatment base stations. The pollutant removal and conversion capabilities of the above-mentioned devices in the influent were investigated. The effluent data showed that COD≤15mg / L, BOD≤5mg / L, NH4 + -N concentration ≤ 0.2 mg / L, TN concentration ≤ 3 mg / L, TP ≤ 0.2 mg / L. At the same time, the entire device does not require additional carbon source, and the discharge of residual sludge is reduced by 60%.
[0029] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0030] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.
Claims
1. A sewage treatment device, characterized in that: include: anaerobic zone; an anoxic zone, wherein an inlet of the anoxic zone is connected to an outlet of the anaerobic zone; an aerobic zone, wherein the aerobic zone inlet is connected to the anoxic zone outlet, and one outlet of the aerobic zone is connected to the other inlet of the anoxic zone; a sedimentation tank, wherein the inlet of the sedimentation tank is connected to the other outlet of the aerobic zone; A side stream fermentation zone, wherein the inlet of the side stream fermentation zone is connected to the bottom outlet of the sedimentation tank, and the outlet of the side stream fermentation zone is connected to an inlet of the anaerobic zone; The second anoxic zone has an inlet connected to the top outlet of the sedimentation tank.
2. The sewage treatment device according to claim 1, characterized in that: The bottom outlet of the sedimentation tank is connected to an inlet of the anaerobic zone.
3. The sewage treatment device according to claim 1, characterized in that: It also includes a water inlet box, which is connected to another inlet of the anaerobic zone through a water inlet pipe, and a water inlet pump is provided on the water inlet pipe.
4. The sewage treatment device according to claim 1, characterized in that: It also includes a water outlet tank, the inlet of which is connected to the outlet of the second anoxic zone.
5. The sewage treatment device according to claim 2, characterized in that: The bottom outlet of the sedimentation tank is connected to an inlet of the anaerobic zone through a sludge return pipe, and the inlet and outlet of the side stream fermentation zone are both connected to the sludge return pipe through a side stream sludge return pipe.
6. The sewage treatment device according to claim 5, characterized in that: The sludge return pipe and the side stream sludge return pipe are both provided with sludge pumps.
7. The sewage treatment device according to claim 4, characterized in that: One outlet of the aerobic zone is connected to the other inlet of the anoxic zone through a nitrification liquid reflux pipe. The nitrification liquid reflux pipe, the pipe connecting the sedimentation tank inlet and the other outlet of the aerobic zone, and the pipe connecting the outlet water tank inlet and the outlet of the second anoxic zone are all equipped with water pumps.
8. The sewage treatment device according to claim 1, characterized in that: The device also includes an air pump connected to the aerobic zone for aerating the aerobic zone, and a flow meter is provided on the pipeline connecting the air pump and the aerobic zone.
9. The sewage treatment device according to claim 1, characterized in that: It also includes a stirring paddle for stirring the sewage in the anoxic zone.
10. The sewage treatment device according to claim 1, characterized in that: Fillers and wave makers are provided in the second anoxic zone.